The Apple iPad Review (2012)
by Vivek Gowri & Anand Lal Shimpi on March 28, 2012 3:14 PM ESTThe Impact of Larger Memory
Apple doubled memory capacity on the new iPad to 1GB, marking the first time in recent history that Apple's flagship product offers a similar amount of memory to the current crop of high-end Android devices. Apple's iOS can do a relatively good job with limited system memory as it will conservatively unload applications from memory in the event that it needs to free up more space. iOS does not support paging to flash, making DRAM size a hard limit for developers looking to really push the platform.
Apple has always been conservative on DRAM sizing because it's a great way of reducing the BOM (Bill of Materials) cost. If Apple can make up for having less DRAM by being more aggressive in software (read: kicking apps out of memory), it's a tradeoff that makes sense. It's really Apple's foray into gaming that has added pressure to increase memory sizes.
With the move to the Retina Display, the amount of memory needed to store a single frame increases by 4x—from 3MB to 12MB. Assuming two buffered frames you're looking at 24MB of RAM just to smoothly display what you're seeing on the screen.
The bigger problem isn't the frame buffer, but rather all of the other data you need (e.g. level data, textures, etc...). The higher the screen resolution, the more important it is to have higher quality assets in your game. Texture compression can go a long way, but at some point there's simply more data to deal with as game complexity increases. It's not just about the increase in resolution either. As GPU horsepower increases, so will the complexity of what game developers try to build.
While the frame buffer size increased thanks to the Retina Display, total system memory increased by a much larger amount. With 1GB of memory, game developers are now less constrained.
A more immediate benefit is apps and web pages will remain resident in memory longer as you open open up and switch to other apps. For example, on the iPad 2 if I open four tabs in Safari (AT, Engadget, Reddit, and Tech Report), open iPhoto, run Infinity Blade 2 and GTA 3, switching between the latter two will always require a full game reload (as in you see the intro and everything before you pick up where you left off). On the new iPad, with the same setup, I can switch between Infinity Blade 2 and GTA 3 and automatically resume where I last left off thanks to the extra DRAM. You can still create a scenario where even 1GB isn't enough, it's just that the limit is now higher than it was on the iPad 2.
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jjj - Wednesday, March 28, 2012 - link
Testing battery life only in web browsing ? Maybve that would be ok for a 100$ device.As it is the battery tests are prety poor,you do video playback when every SoC out there has a dedicated decode unit and that test is only representative for vid playback.Here the most important test should have been battery life when both GPU and CPU are loaded and not including that seems like an intentional omission to avoid makiing the device look bad.There are a lot of other things to say about the review,too many but one thing has to be said.
This is a plan B or plan C device.The screen is the selling point,is what had to go in,they didn't had 28/32nm in time and had to go for a heavier,thicker,hotter device with a huge chip (CPU speed is limited most likely by heat not so much power consumption,ofc both are directly related).Apple had to make way too many compromises to fit in the screen,no way this was plan A.
tipoo - Thursday, March 29, 2012 - link
I would have liked a gaming battery life test as well.PeteH - Thursday, March 29, 2012 - link
Beyond even that, I'd like to see a worst-case battery life (i.e. gaming, max brightness, LTE up, etc).Also, it'd be really interesting to see how brightness impacts battery life. Maybe the web browsing test at 20%, 40%, 60%, 80%, and 100% brightness. Of course that would probably delay the review by several days, so it might not be worth it.
Anand Lal Shimpi - Thursday, March 29, 2012 - link
We did a max brightness test, however a gaming test would be appropriate as well. I will see if I can't run some of that in the background while I work on things for next week :)Take care,
Anand
SimpleLance - Wednesday, March 28, 2012 - link
The biggest drain for the battery comes from the display. So, if the iPad will be used for hotspot only (with display turned off), you will get a lot of hours from it because it has such a huge battery.But then, using the the iPad just for a hotspot would be a waste of that gorgeous display.
Very nice review of a very nice product.
thrawn3 - Wednesday, March 28, 2012 - link
Am I the only one that feels the max brightness is more important in day to day use of a highly portable device than DPI and color accuracy?I absolutely would love to have all of these three be excellent but I think for a tablet or small laptop Max Brightness and DPI are higher priority than color accuracy. This is exactly what the ASUS Transformer Infinity is supposed to be but I would prefer it on a real laptop.
I care about color accuracy too but I am perfectly fine with needing a desktop monitor and trading brightness there since it is in a stable environment until we hit the technological level that will allow all these elements to be combined. Maybe quantum dot display technology in the future?
One thing I have to give all these new displays is that they FINALLY have gotten the wide viewing angles thing right and I will be so happy to get this into the rest of the market.
seapeople - Tuesday, April 3, 2012 - link
Would you really prefer a bright 1366x768 TN panel with 200 contrast ratio on a 15" laptop over a less bright IPS Ipad screen with much better resolution, DPI, color accuracy, and viewing angle?vision33r - Wednesday, March 28, 2012 - link
The screen is really gorgeous when you shoot raw with any DSLR and view it in iPhoto.ol1bit - Wednesday, March 28, 2012 - link
I just bought a Asus Transformer Prime, and your review was spot on with what I decided. I can not live with IOS and using Android for 3 years.Just the simple stuff was my decision:
1. Freedom of Android, file transfers, etc. No Itunes requirement.
2. MicroSD
3. Kewl keyboard
4. Live Wallpaper.
5. A real desktop, separate from my applications.
6. 32GB versus 16GB
7. Gorilla Glass (yes, true. My original droid lived in my pocket 2 years no scratches, my HTC Rezound scratches the first 2 weeks).
8. Asus (love their MBs)
9. Nivida (love their GPUs)
What I will miss:
1. Ipad 3 Display.
darkcrayon - Thursday, March 29, 2012 - link
1. iTunes is no longer ever needed for an iOS device. I consider the option of a first party desktop sync solution to be an advantage now that it's not a requirement.7. It seems likely the new iPad uses Gorilla Glass or Gorilla Glass 2...
9. Odd that you'd love nVidia's GPUs when they've been pretty much the bottom of the performance barrel for ARM device graphics, even excluding Apple's SoCs (which have lately been using the fastest GPUs in the industry by far).