The 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.

A Word on Packaging & Looking Forward GPU Performance
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  • sciwizam - Wednesday, March 28, 2012 - link

    Did the test suite change from your review of the Galaxy Tab 10.1 LTE? Reply
  • Anand Lal Shimpi - Wednesday, March 28, 2012 - link

    It did indeed, let me see if I can't run the updated suite on the Galaxy Tab 10.1 LTE though...

    Take care,
    Anand
    Reply
  • jadawgis732 - Wednesday, March 28, 2012 - link

    Hey Anand, I always wanted to say how much I admire your reviews, and how unbiased and untouched by corporate dollars they are. Keep up the great work! Also, it's very nice to see you responding to replies in the comments! Reply
  • Anand Lal Shimpi - Thursday, March 29, 2012 - link

    Thank you for the kind words and for reading the site :)

    Take care,
    Anand
    Reply
  • medi01 - Thursday, March 29, 2012 - link

    Samsung Galaxy Tab randomly dissapearing from charts where it would look favourably indeed leaves "unbiased" impression. (For instance color gamut is on par with "ipad 3" and way above ipad2) Reply
  • Anand Lal Shimpi - Friday, March 30, 2012 - link

    I promise it's not that sinister :) I simply opted to compare to the best of the best out there today as far as Android tablets are concerned: the ASUS Transformer Prime.

    I understand the desire for more results so I'll be working on them in the background over the weekend.

    Take care,
    Anand
    Reply
  • xytc - Wednesday, March 28, 2012 - link

    I've heard that Apple's strong marketing campaign penetrates pussies, so if you have an Apple product you're nothing but a pussy. LMFAO Reply
  • PeteH - Wednesday, March 28, 2012 - link

    Really? Reply
  • MobiusStrip - Thursday, March 29, 2012 - link

    "LMFAO"?

    Wow, low humor threshold.
    Reply
  • Wardawg - Thursday, April 05, 2012 - link

    Well most people adept in technology or use tech in their buisness use apple products: djs programmers, and others, and frankly I see more iPhones being used than androids. So apparently most of the world is pussies by your definition. Please do research before you bash a company's products Reply

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