bartolo5
Jun 18, 04:08 AM
This is easily the most factually complete and correct post in this thread. Kudos!
Why did/do we even have dual/tri-band GSM phones or HSPA phones that don't do AWS - especially now in 2010? Is it antenna design? Is it the extra analog front ends needed? Is it just product market segmentation?
Yes, for every band supported in the phone there needs to be an analog amplifier between the antenna and the RF modem. There are also antenna issues. Antennas have to be designed to be tuned to the specific bands, so if you have a pentaband antenna things can get quite tricky. I am an EE although my antenna design skills are quite rusty, it would seem that 850/900 and 1800/1900 should be easy to implement given that a) grouped together they are closed enough bands, and b) they lie in two groups of frequencies that are multiple exactly by 2, giving you an antenna that has to be exactly half of the wavelength and making it easier to design an antenna with a form that resonates on both frequencies. If you throw 2100Mhz things get complicated and if if you add 1700 even more so.
Whatever it is, the frequency bands supported by the phone are not trivial to implement and they are a technical challenge. That's why many times you get different versions of the same phone for different markets with different supported bands. If it was easy to just one phone for all they would do it.
Why did/do we even have dual/tri-band GSM phones or HSPA phones that don't do AWS - especially now in 2010? Is it antenna design? Is it the extra analog front ends needed? Is it just product market segmentation?
Yes, for every band supported in the phone there needs to be an analog amplifier between the antenna and the RF modem. There are also antenna issues. Antennas have to be designed to be tuned to the specific bands, so if you have a pentaband antenna things can get quite tricky. I am an EE although my antenna design skills are quite rusty, it would seem that 850/900 and 1800/1900 should be easy to implement given that a) grouped together they are closed enough bands, and b) they lie in two groups of frequencies that are multiple exactly by 2, giving you an antenna that has to be exactly half of the wavelength and making it easier to design an antenna with a form that resonates on both frequencies. If you throw 2100Mhz things get complicated and if if you add 1700 even more so.
Whatever it is, the frequency bands supported by the phone are not trivial to implement and they are a technical challenge. That's why many times you get different versions of the same phone for different markets with different supported bands. If it was easy to just one phone for all they would do it.
Eraserhead
Apr 7, 08:14 AM
The Mac Guides are a great resource for the website, however I think the categories of articles on the site aren't particularly great which makes finding information difficult.
I'd like to try and improve it, but part of the problem is the front page, which I can't edit and there should be a consensus on something that major.
There a some categories that contain very little good content, for example the "Companies" category. There are some which are fairly meaningless like the "Guides" category. And there are some which seem a little wishy-washy like the "Digital Lifestyle" category, what should go in there? I think the following categories on the front page would be good.
Main Categories
Mac Hardware - Apples Mac hardware and related articles such as the ones for RAM and upgrades. Subcategories for laptops, desktops, and possibly individual models.
Mac Software - Any software available for Mac OS X. Subcategories for Mac OS X, individual software titles and Programming.
iTunes - Anything related to iTunes for Mac or Windows.
iPod/Apple TV - Anything iPod or AppleTV (which is essentially an iPod that doesn't move :p) related.
iPhone/iPod Touch - Anything iPhone, or iPod Touch related. Subcategories for jailbreaking and individual software titles.
Gaming - The gaming articles are very popular (http://guides.macrumors.com/Special:Popularpages), and that Mac isn't always the best platform for gaming, so I think it should have its own category, including articles for connecting your console to your Mac. With subsections for iPod Game titles, Mac Game titles.
Networking and Internet - Internet Related Articles. Subcategory for Software titles.
People and Organisations - Any articles for companies and analysts and Apple CEO's.
Special Categories
MacRumors.com - Same as now.
Forum Posts - Same as now, but this should be a special category.
Uncategorised - Anything that doesn't fit in the above categories. Could possibly be renamed "Miscellaneous" or something.
Finally a link to the Help:Contents article from the front page would be useful.
Any thoughts? Anything major I've missed?
I'd like to try and improve it, but part of the problem is the front page, which I can't edit and there should be a consensus on something that major.
There a some categories that contain very little good content, for example the "Companies" category. There are some which are fairly meaningless like the "Guides" category. And there are some which seem a little wishy-washy like the "Digital Lifestyle" category, what should go in there? I think the following categories on the front page would be good.
Main Categories
Mac Hardware - Apples Mac hardware and related articles such as the ones for RAM and upgrades. Subcategories for laptops, desktops, and possibly individual models.
Mac Software - Any software available for Mac OS X. Subcategories for Mac OS X, individual software titles and Programming.
iTunes - Anything related to iTunes for Mac or Windows.
iPod/Apple TV - Anything iPod or AppleTV (which is essentially an iPod that doesn't move :p) related.
iPhone/iPod Touch - Anything iPhone, or iPod Touch related. Subcategories for jailbreaking and individual software titles.
Gaming - The gaming articles are very popular (http://guides.macrumors.com/Special:Popularpages), and that Mac isn't always the best platform for gaming, so I think it should have its own category, including articles for connecting your console to your Mac. With subsections for iPod Game titles, Mac Game titles.
Networking and Internet - Internet Related Articles. Subcategory for Software titles.
People and Organisations - Any articles for companies and analysts and Apple CEO's.
Special Categories
MacRumors.com - Same as now.
Forum Posts - Same as now, but this should be a special category.
Uncategorised - Anything that doesn't fit in the above categories. Could possibly be renamed "Miscellaneous" or something.
Finally a link to the Help:Contents article from the front page would be useful.
Any thoughts? Anything major I've missed?
javaGuru
Aug 19, 10:35 AM
I dont know what kind of CRAZY KILLER friends you all have on facebook. I only have relatives and close friends I see and talk to on a normal occasion.
IF YOU DONT REALLY KNOW SOMEONE DONT ADD THEM AS A FRIEND DUH.
and only share the info you want with the people you want.. its not that hard really.
Honda CR-V Facelift
IF YOU DONT REALLY KNOW SOMEONE DONT ADD THEM AS A FRIEND DUH.
and only share the info you want with the people you want.. its not that hard really.
dejo
Apr 6, 06:20 PM
Selling outside the Marketplace
All threads offering items for sale or trade, asking to buy items, or asking for pricing advice on items to be sold must be posted in the Marketplace forum, which is accessible only to qualified members and subject to additional rules; see the Marketplace Rules for details. Members not eligible for the Marketplace forum may not start threads elsewhere for such purposes.
from http://guides.macrumors.com/Help:Forum_Rules#Minor_Problems
more...
Year 2011. Model: Honda CR-V
2011 Honda Cr-v In Bloomfield
more...
2011 Honda CR V Front Three
All threads offering items for sale or trade, asking to buy items, or asking for pricing advice on items to be sold must be posted in the Marketplace forum, which is accessible only to qualified members and subject to additional rules; see the Marketplace Rules for details. Members not eligible for the Marketplace forum may not start threads elsewhere for such purposes.
from http://guides.macrumors.com/Help:Forum_Rules#Minor_Problems
more...
Mac-Addict
Oct 24, 05:47 PM
going to get there at about 1730; coming to london from uni by train, lectures finish at 4ish, just want to get a tshirt; already ordered lepoard online.
doubt there's going to be a massive queue, and its closed between 4 and 6pm, so 5:30 sounds like a sensible time to me.
how about meet by the computer with macrumors up on the screen?? preferably on the dual 30" ones.
That is actually a good idea make sure people can see the screen :P Somewhere near the top of the stairs.
doubt there's going to be a massive queue, and its closed between 4 and 6pm, so 5:30 sounds like a sensible time to me.
how about meet by the computer with macrumors up on the screen?? preferably on the dual 30" ones.
That is actually a good idea make sure people can see the screen :P Somewhere near the top of the stairs.
thisisahughes
Apr 1, 03:17 PM
I was excited for this app. when I heard about it. The evening it was released it kept crashing. I gave up on it then; and the intro is a little much too. I'm deleting it. Thanks for letting me down again TWC.
more...
iDutchman
Apr 14, 10:15 AM
Yesterday a record broken here in the Netherlands, � 1.747 a Liter.
2010 Honda CR-V (EX-L with
more...
Base models of the 2011 Honda
Year 2011. Model: Honda CR-V
more...
2011 Honda CR-V
HONDA CITY 1.3 A 2011 MODEL
more...
The 2011 Honda CR-V is a
Share2011 CR-V Special
more...
Year 2011. Model: Honda CR-V
Automotive Cars | Honda CR-V
more...
2011 honda cr v
2011 Honda Cr-v Ex-l Sport
2011 Honda Cr-v Ex-l 4wd
fixyourthinking
Oct 26, 03:05 PM
Only edits lossless not compressed files.
It doesn't edit AACs or MP3s.
It doesn't edit AACs or MP3s.
more...
lepidoptera
Nov 21, 06:23 PM
...I mean isn't this just cold fusion?
Why are these guys in Utah though?
I think their being in Utah is entirely appropriate for cold fusion, don't you? ;)
Why are these guys in Utah though?
I think their being in Utah is entirely appropriate for cold fusion, don't you? ;)
WestonHarvey1
Apr 6, 09:40 PM
What's wrong with a keyboard or touch typing? I guess I don't see where you're going with this, as typing on a touch screen for long pieces of work or long periods of time is far less efficient. I see where the touch interface has its uses, but in some places it's just far less practical.
You *can* touch type on an iPad, though. I type long emails on it without looking at the screen. I wonder if people just assume you can't, so they don't try.
You *can* touch type on an iPad, though. I type long emails on it without looking at the screen. I wonder if people just assume you can't, so they don't try.
more...
alent1234
Mar 25, 09:48 AM
Recipe and shopping list Palm / Windows Mobile apps like Pocket Cook date from 2000. That one in particular won awards for years.
What you mean is, it wasn't until iOS that the mass public else took notice. Millions of us were surfing the web and using apps on PDAs, smartphones and tablets long before that.
i remember they had add ons back then to get cell data, but it was expensive. did they have OTA contact and calendar sync?
What you mean is, it wasn't until iOS that the mass public else took notice. Millions of us were surfing the web and using apps on PDAs, smartphones and tablets long before that.
i remember they had add ons back then to get cell data, but it was expensive. did they have OTA contact and calendar sync?
tvguru
Sep 25, 11:18 AM
See the previous posts. A number of Fuji cameras that were not supported now are.
Alright, I didn't read it that way the first time, but went back over them and see how I should have read it that way. :o
Alright, I didn't read it that way the first time, but went back over them and see how I should have read it that way. :o
more...
MisterMe
Sep 20, 09:28 AM
Originally posted by ColdZero
Oh yea, nice and fast :rolleyes:. A Dual 1.25Ghz G4 vs a single 2.8ghz P4, uhhh isn't that a little unfair. Where is the dual 2.4ghz P4 vs dual 1.25ghz G4 comparison?
You are absolutely correct. We should only compare dual-processor Apple computers to other dual-processor computers. Please list your benchmarks for a dual-processor Dell, HP/Compaq, or Gateway personal computer.
Oh yea, nice and fast :rolleyes:. A Dual 1.25Ghz G4 vs a single 2.8ghz P4, uhhh isn't that a little unfair. Where is the dual 2.4ghz P4 vs dual 1.25ghz G4 comparison?
You are absolutely correct. We should only compare dual-processor Apple computers to other dual-processor computers. Please list your benchmarks for a dual-processor Dell, HP/Compaq, or Gateway personal computer.
Popeye206
Mar 25, 08:44 AM
Before all you Apple fannies disagree with this; just remember Apple is trying to sue everyone else too.
It's all ridiculous.
Disagree. It's not ridiculous. Valid patent protection is great. That's the whole point of a patent to protect your invention. Any company with a valid invention and patent should pursue any and all infringements.
However, there are many high-tech patents that are BS or weak. Plus, I think patent holders should have to make claims of infringement in a reasonable amount of time after a potential infringement. Sitting back and waiting for products to be wildly successful before pursuing a case is nothing but settlement bloat. Finally, there is patent trolling which should be illegal as it's just lawyers looking to cash in on settlements and costs consumers. Patent trolling is like ambulance chasers. Lowest form of greed.
It's all ridiculous.
Disagree. It's not ridiculous. Valid patent protection is great. That's the whole point of a patent to protect your invention. Any company with a valid invention and patent should pursue any and all infringements.
However, there are many high-tech patents that are BS or weak. Plus, I think patent holders should have to make claims of infringement in a reasonable amount of time after a potential infringement. Sitting back and waiting for products to be wildly successful before pursuing a case is nothing but settlement bloat. Finally, there is patent trolling which should be illegal as it's just lawyers looking to cash in on settlements and costs consumers. Patent trolling is like ambulance chasers. Lowest form of greed.
more...
KnightWRX
Apr 26, 04:33 AM
USB sticks are too expensive and take too much time to duplicate "en masse". DVDs are very cheaper and take few seconds to duplicate if even that since they are being pressed (not burned in the case of mass duplication). USB sticks are also more expensive.
It doesn't make sense to go to a USB only distribution model, at least from a cost basis. As for Mac App Store... meh... why not do downloads outside of the Mac App Store, I don't want to use that POS. I've been installing OSes from HTTP and FTP since the mid-90s, no need for a "Mac App Store" to do it. What happens if I don't have a 10.6 or 10.7 installation going and just want to wipe the computer ? Linux has been doing network installs from nothing. Upon purchase, just provide a USB thumb-drive image I can put on any 1 GB thumb-drive to boot into the installer where I put in my purchase code or something. No need for the "Mac App Store".
It doesn't make sense to go to a USB only distribution model, at least from a cost basis. As for Mac App Store... meh... why not do downloads outside of the Mac App Store, I don't want to use that POS. I've been installing OSes from HTTP and FTP since the mid-90s, no need for a "Mac App Store" to do it. What happens if I don't have a 10.6 or 10.7 installation going and just want to wipe the computer ? Linux has been doing network installs from nothing. Upon purchase, just provide a USB thumb-drive image I can put on any 1 GB thumb-drive to boot into the installer where I put in my purchase code or something. No need for the "Mac App Store".
blondepianist
Mar 23, 02:09 PM
...it worked reliably from my Mac Mini (2010) to my iPad 2 without saying "you are not authorized to play this video" every other time, I would care.
I'm assuming you're using AirView or the like? If so, realize that it's a third-party hack - of course it doesn't work.
I'm assuming you're using AirView or the like? If so, realize that it's a third-party hack - of course it doesn't work.
more...
Xian Zhu Xuande
Apr 5, 10:27 AM
Well, this is confusing.
Last year Macrumors posters told me in no uncertain terms that CR is always wrong.
So how am I supposed to take this news?
To mean that CR has some degree of sanity?
Same thought. Why cant people just (I know this sounds crazy) listen to CR when they make factually based reviews (i.e., iPhone 4 antenna design CAN lead to dropped calls). I hate this blind bias some folks have on here.
I think some folks here have a legitimate gripe with CR. Of course there are plenty who don't even bother to think it through, hating them simply because they attacked an Apple product, but on that note they gave heavy weight to the antenna issue, did not do similar testing on other similar products (including those which clearly had similar issues), and continued to highlight the issue. It looks very much like a publicity grab.
I'm not losing a moment of sleep over it, and I actually do use CR from time to time (though sometimes they've recommended trash to me), but it isn't right to give them a night of sweet loving just because they highlighted the iPad when it doesn't yet have real competition.
Last year Macrumors posters told me in no uncertain terms that CR is always wrong.
So how am I supposed to take this news?
To mean that CR has some degree of sanity?
Same thought. Why cant people just (I know this sounds crazy) listen to CR when they make factually based reviews (i.e., iPhone 4 antenna design CAN lead to dropped calls). I hate this blind bias some folks have on here.
I think some folks here have a legitimate gripe with CR. Of course there are plenty who don't even bother to think it through, hating them simply because they attacked an Apple product, but on that note they gave heavy weight to the antenna issue, did not do similar testing on other similar products (including those which clearly had similar issues), and continued to highlight the issue. It looks very much like a publicity grab.
I'm not losing a moment of sleep over it, and I actually do use CR from time to time (though sometimes they've recommended trash to me), but it isn't right to give them a night of sweet loving just because they highlighted the iPad when it doesn't yet have real competition.
Winni
Mar 18, 03:45 PM
In response to all the "Recommend Me a Camera/Lens/Editor etc" threads, I offer this. Comments or additions?
Never Show Your Work To Anyone
I somehow agree, at least as long as those others have nothing to show that they did that you clearly find impressive. The comments of others rarely help you improve your own work.
Read Only "Expert Photographer" Blogs, Articles, and Books
That certainly is better than reading Macrumors or other non-photographer blogs when photography is what you're interested in.
Leave Your Camera On Auto...:eek:...
Actually, you should buy a camera that does not even have an "auto" switch. I strongly recommend something like an old (analog!) Pentax K-1000 as the first camera. There was a time when photography schools did not accept cameras with automatic features. With K-1000, you have to do EVERYTHING manually - and that is the best way to actually learn how to take photos.
Buy A New and More Expensive Camera Because It'll Make Better Pictures
Better gear does not make anyone a better photographer. HOWEVER, it can drastically improve the TECHNICAL aspects/results. If you want to make large posters of your pictures, then there are natural limits to what you can do with, let's say, a 6 MP camera.
Spend Too Much Time Mastering Photoshop
Photoshop is a tool for graphics designers and the print business. For almost all photography needs, Aperture or Lightroom provide as much features as one will probably ever need. But none of those digital toys make you a better photographer.
Mine is this: Fixate on one style of photography or subject.
I agree. And you probably shouldn't start with taking photos of models/people -- it's demanding and can easily become frustrating. Try mastering your camera and training your eye(!) first. Get a feel for what a photo will look like before you even begin processing/developing it. There's usually a big difference between what you see and what your camera sees; try to get your tool in sync with your eye and imagination. It requires a lot of practice, so shoot a lot. The beauty of digital photography is that you can shoot as much as like without depleting your bank account - analog photography was more expensive to learn.
Never Show Your Work To Anyone
I somehow agree, at least as long as those others have nothing to show that they did that you clearly find impressive. The comments of others rarely help you improve your own work.
Read Only "Expert Photographer" Blogs, Articles, and Books
That certainly is better than reading Macrumors or other non-photographer blogs when photography is what you're interested in.
Leave Your Camera On Auto...:eek:...
Actually, you should buy a camera that does not even have an "auto" switch. I strongly recommend something like an old (analog!) Pentax K-1000 as the first camera. There was a time when photography schools did not accept cameras with automatic features. With K-1000, you have to do EVERYTHING manually - and that is the best way to actually learn how to take photos.
Buy A New and More Expensive Camera Because It'll Make Better Pictures
Better gear does not make anyone a better photographer. HOWEVER, it can drastically improve the TECHNICAL aspects/results. If you want to make large posters of your pictures, then there are natural limits to what you can do with, let's say, a 6 MP camera.
Spend Too Much Time Mastering Photoshop
Photoshop is a tool for graphics designers and the print business. For almost all photography needs, Aperture or Lightroom provide as much features as one will probably ever need. But none of those digital toys make you a better photographer.
Mine is this: Fixate on one style of photography or subject.
I agree. And you probably shouldn't start with taking photos of models/people -- it's demanding and can easily become frustrating. Try mastering your camera and training your eye(!) first. Get a feel for what a photo will look like before you even begin processing/developing it. There's usually a big difference between what you see and what your camera sees; try to get your tool in sync with your eye and imagination. It requires a lot of practice, so shoot a lot. The beauty of digital photography is that you can shoot as much as like without depleting your bank account - analog photography was more expensive to learn.
wilburpan
Sep 21, 09:43 PM
Originally posted by cr2sh
Fine, lets just assume that a 800mhz imac and a 1.8gigahertz dell are similar in performance, equiptment and cost... this thread is about speed.....
[snip]
the g4 cannot beat the p4 in performance....
Granted www.cpuscorecard.com doesn't really clarify what benchmarks they use, but in their estimation, a dual 1.25GHz Mac beats a 2.4 Ghz P4 by a hair, and is just a little behind a 2.8 GHz P4. Likewise, a 800MHz G4 is very comparable to a 1.8 Ghz P4. The important thing that I see in this ranking is that in perusing the rest of this website, the people who came up with these ratings do not look to be particularly Mac friendly.
Based on this, I would have to disagree with your assertion that "the g4 cannot beat the p4 in performance", unless your only criteria for performance is sheer GHz speed. It seems to me that at the high end, the two chips are at least competitive, and in the middle of the pack, I would say that Macs are a better buy.
Fine, lets just assume that a 800mhz imac and a 1.8gigahertz dell are similar in performance, equiptment and cost... this thread is about speed.....
[snip]
the g4 cannot beat the p4 in performance....
Granted www.cpuscorecard.com doesn't really clarify what benchmarks they use, but in their estimation, a dual 1.25GHz Mac beats a 2.4 Ghz P4 by a hair, and is just a little behind a 2.8 GHz P4. Likewise, a 800MHz G4 is very comparable to a 1.8 Ghz P4. The important thing that I see in this ranking is that in perusing the rest of this website, the people who came up with these ratings do not look to be particularly Mac friendly.
Based on this, I would have to disagree with your assertion that "the g4 cannot beat the p4 in performance", unless your only criteria for performance is sheer GHz speed. It seems to me that at the high end, the two chips are at least competitive, and in the middle of the pack, I would say that Macs are a better buy.
MacRumors
Sep 1, 01:10 AM
http://www.macrumors.com/images/macrumorsthreadlogo.gif (http://www.macrumors.com)
According to reports, Apple has already provided an update to their Mac OS X 10.5 Leopard Preview that was distributed to developers at WWDC 2006. The update provides few details on the improvements provided:
This Software Update delivers improved reliability and compatibility for Mac OS X Leopard Developer Preview and is recommended for all users.
The 46.4MB release is simply entitled "Leopard Developer Preview Update 1.0" and updates Build 9A241 to Build 9A241e.
Apple demonstrated (http://www.apple.com/macosx/leopard/) Mac OS X 10.5 Leopard at WWDC, revealing some of the features that are expected. Mac OS X 10.5 is not expected to be released until Spring of 2007.
According to reports, Apple has already provided an update to their Mac OS X 10.5 Leopard Preview that was distributed to developers at WWDC 2006. The update provides few details on the improvements provided:
This Software Update delivers improved reliability and compatibility for Mac OS X Leopard Developer Preview and is recommended for all users.
The 46.4MB release is simply entitled "Leopard Developer Preview Update 1.0" and updates Build 9A241 to Build 9A241e.
Apple demonstrated (http://www.apple.com/macosx/leopard/) Mac OS X 10.5 Leopard at WWDC, revealing some of the features that are expected. Mac OS X 10.5 is not expected to be released until Spring of 2007.
chrissnv
Mar 26, 03:36 PM
It looks like they are right outside of an Apple store!
Actually this is not the Apple Store. The Apple Store is further down University Avenue opposite a Borders (at least for now). The Rumor is that they are thinking about moving to another location on that street.
Actually this is not the Apple Store. The Apple Store is further down University Avenue opposite a Borders (at least for now). The Rumor is that they are thinking about moving to another location on that street.
F123D
Mar 24, 03:30 PM
Glad I browse these forums at work. Just called my local Verizon and they're holding their last 16GB wifi for me. :D
I can't even get someone on craigslist to sell me their used one for this price!!
I can't even get someone on craigslist to sell me their used one for this price!!
Henri Gaudier
Jan 28, 03:43 AM
Interesting to hear you say that -- I use the Oyster RFID card for public transport here in London, and it's incredibly efficient. Compared to paper tickets, it's faster to use, faster to pay for, and much more durable.
Would be great to have this built into my iPhone...
EDIT: http://en.wikipedia.org/wiki/Oyster_card#Usage_statistics to see just how massively popular RFID technology is here. Only 4% of Tube users use cash, the rest use RFID for their journeys!
If there's one nation running towards a surveillance state it's the UK. Even the Information Commissioner agrees. What's worse is the UK Home Office has successfully proselytised this to the Dwarf Commander In Chief Sarko who has promised to spend literally billions to emulate the UK here in France.
Would be great to have this built into my iPhone...
EDIT: http://en.wikipedia.org/wiki/Oyster_card#Usage_statistics to see just how massively popular RFID technology is here. Only 4% of Tube users use cash, the rest use RFID for their journeys!
If there's one nation running towards a surveillance state it's the UK. Even the Information Commissioner agrees. What's worse is the UK Home Office has successfully proselytised this to the Dwarf Commander In Chief Sarko who has promised to spend literally billions to emulate the UK here in France.
Hellhammer
Apr 20, 02:10 PM
Why do you guys assume Nvidia cannot make graphic cards for Sandy Bridge? Have you seen Dell's Alienware laptop line? They have the new processors and also are using Nvidia graphics card.
NVidia can make graphics cards but they cannot make chipsets. The 320M is the chipset as well. There are only two chips in the logic board, the CPU and 320M. With a discrete GPU, there would have to be three chips; CPU, PCH and GPU. Since space is very limited in MBA, there is simple no space for all three chips.
NVidia can make graphics cards but they cannot make chipsets. The 320M is the chipset as well. There are only two chips in the logic board, the CPU and 320M. With a discrete GPU, there would have to be three chips; CPU, PCH and GPU. Since space is very limited in MBA, there is simple no space for all three chips.
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