SoCs and Graphics

Intel isn’t talking about implementations of Silvermont today other than to say that it will show up in smartphones (Merrifield), tablets (Baytrail), automotive (unannounced), communications infrastructure products (Rangeley) and microservers (Avoton). Baytrail, the tablet implementation of Silvermont, will be available by the end of this year running both Windows 8 (8.1/Blue?) and Android. Silvermont based Merrifield phones will show up early in 2014.

What we know about Baytrail is that it will be a quad-core implementation of Silvermont paired with Intel’s own Gen 7 graphics. Although we don’t know clock speeds, we do know that Baytrail’s GPU core will feature 4 EUs - 1/4 the number used in Ivy Bridge’s Gen7 implementation (Intel HD 4000). Ultimately we can’t know how fast the GPU will be until we know clock speeds, but I wouldn’t be too surprised to see something at or around where the iPad 4’s GPU is today. Given Intel’s recent announcements around Iris and Iris Pro, it’s clear that the mobile team hasn’t yet had the graphics wakeup call that the Core team just got - but I suspect the Atom group will get there sooner rather than later. Intel’s eDRAM approach to scaling Haswell graphics (and CPU) performance has huge implications in mobile. I wouldn’t expect eDRAM enabled mobile SoCs based on Silvermont, but I wouldn’t be too surprised to see something at 14nm.

Penryn-Class Performance

When Atom first came out, I put its CPU performance in perspective by comparing it to older Pentium M based notebooks. It turned out that a 1.6GHz Atom performed similarly to a 1.2GHz Pentium M. So how does Silvermont stack up in PC notebook terms?

On single threaded performance, you should expect a 2.4GHz Silvermont to perform like a 1.2GHz Penryn. To put it in perspective of actual systems, we’re talking about around the level of performance of an 11-inch Core 2 Duo MacBook Air from 2010. Keep in mind, I’m talking about single threaded performance here. In heavily threaded applications, a quad-core Silvermont should be able to bat even further up the Penryn line. Intel is able to do all of this with only a 2-wide machine (lower IPC, but much higher frequency thanks to 22nm).

There’s no doubt in my mind that a Baytrail Android tablet will deliver amazing performance, the real unknown is whether or not a Baytrail Windows 8 detachable/convertible will be fast enough to deliver a good enough legacy Windows experience. I suspect it’ll take Airmont before we really get there by my standards, but it’ll be close this round for sure.

What’ll really be interesting to see is how Silvermont fares in smartphones. Max clock speeds should be lower than what’s possible in a tablet, but not by all that much thanks to good power management. When viewed in that light, I don’t know that there’s a more exciting mobile architecture announced at this point. The ability to deliver 2010 11-inch MacBook Air performance in a phone is insane.

The Silvermont Module and Caches Tablet Expectations & Performance
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  • samda - Monday, May 13, 2013 - link

    I signed up here just to post this and show just how objective Anand really is.
    "It will be insane if Silvermont reaches the 2010 MacBook Air "
    Well what a load of biased ignorance.

    Mr. Anand, you might want to read this and learn a bit:

    http://browser.primatelabs.com/geekbench2/1946978

    http://browser.primatelabs.com/geekbench2/1947269

    Galaxy S4 ALREADY being there, heck even beating it easily!

    Can you imagine what will a 2Ghz Octa do?
    With this kind of memory? http://m.androidauthority.com/samsung-lpddr3-ram-2...

    How about Snapdragon 800?

    But yeah, it seems someone is being too busy sucking on Intel and living in the past!
    Reply
  • etre - Monday, May 13, 2013 - link

    Still Intel is not really trying on this market. They moved up from a 2008 design to a 2010 design on a last year process. And it took them 5 years to do that.
    They should have offered Haswell kind of tech, with the improvements on memory, this summer, at a killer price.

    Why should I support Intel by buying an Asus Phonepad, on a promise that they will bring something sometime, instead of going for a sure bet with the new Nexus 7 and quad core Krait.
    Reply
  • CodyCostaRica - Monday, May 20, 2013 - link

    Anand,

    Thanks so much for this article. I would be highly interested in knowing how Intel's current and future chip road maps stack up against the competitors' current and future offerings in the mobile space (Qualcomm, NVIDIA, Samsung, Apple).

    For example, how does Silvermont compare to the Apple A6X, currently used in the latest iPad?

    Keep up the good work!
    Reply

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