Along with this week’s teaser of the forthcoming Radeon RX 470 and RX 460 at E3, AMD also held a short press briefing about Polaris. The bulk of AMD’s presentation is going to be familiar to our readers who keep close tabs on AMD’s market strategy (in a word, VR), but this latest presentation also brought to light a few more details on the company’s two Polaris GPUs that I want to quickly touch upon.

First and foremost, AMD’s presentation included a slide with pictures of the two chips, and confirmation on their full configurations. The larger Polaris 10 is a 36 CU (2304 SP) chip, meaning that the forthcoming Radeon RX 480 video card is using a fully enabled chip. Meanwhile the smaller Polaris 11 (note that these pictures aren’t necessarily to scale) packs 16 CUs (1024 SPs). This puts it a bit below Pitcairn (20 CUs) before factoring in GCN 4’s higher efficiency. Meanwhile as is common for these lower-power GPUs, AMD’s slide also confirms that it features a 128-bit memory bus.

AMD is expecting Polaris 11 to offer over 2 TFLOPs of performance. Assuming a very liberal range of 2.0 to 2.5 TFLOPs for possible shipping products, this would put clockspeeds of a high-end Polaris 11 part at between 975MHz and 1220MHz, which is similar to our projections for RX 480/Polaris 10. Note that AMD has not yet announced any specific product using Polaris 11, however as we now know that RX 470 is a Polaris 10 based card, it’s safe to assume that RX 460 is Polaris 11, and the over-2 TFLOPs projection is for that card.

Second, briefly mentioned in AMD’s press release on Monday was the low z-height of at least Polaris 11, and it pops up in this slide deck again. There was some confusion whether z-height referred to the laptop or the chip, but the slide makes it clear that this is about the chip. So it will be interesting to see how thin Polaris 11 is, how that compares to other chips, and just what manufacturers can in turn do with it.



View All Comments

  • Flunk - Wednesday, June 15, 2016 - link

    No TVs support 10-bit content and TV shows are filmed at 30fps and movies at 24fps. HTPC is HTPC. Reply
  • hojnikb - Wednesday, June 15, 2016 - link

    It's more of an issue of encoding. Lots of content is encoded with 10 bit HEVC (better efficiency). Reply
  • npz - Wednesday, June 15, 2016 - link

    4K tvs support 10bit. Ultra hd blurays are 10bit. Netflix uses 10bit hevc.

    Finally 10bit is useful even on 8bit displays. It offers better compression efficiency and quality preventing banding in high contrast gradient areas. You don't even a 10bit source for this to be apparent. That's why all the fansubbers and rippers for anime use 10bit for h.264.
  • bloodinmyveins - Wednesday, June 15, 2016 - link

    @npz True. Thank you.

    I love AMD's new route, they should push for it. If they release proper Vega 4K/60FPS@MAXCFG, I will throw my money at them.
  • Michael Bay - Thursday, June 16, 2016 - link

    Puhleaze, fansubber scum will use whatever is hip at the moment. Reply
  • Alexvrb - Thursday, June 16, 2016 - link

    Hip or not, 10-bit *IS* more efficient for encoding certain content, especially anime. Lower bitrate, same quality, or better quality at the same bitrate. Or even a little of both. Even on an 8-bit display. This is the case across multiple modern codecs.

    Anyway a single-slot 460 and a relatively low-end processor can often provide better results than a $200+ chip with an iGPU.
  • Nintendo Maniac 64 - Saturday, June 18, 2016 - link

    Consider that modern lossy audio codecs are actually 32bit floating point even though nobody would ever use a lossy format to preserve native 32bit floating point audio. Reply
  • nathanddrews - Wednesday, June 15, 2016 - link

    ... except all HDR TVs, where 10-bit input is mandatory. You know that UHD Blu-ray, 4K Netflix, 4K Amazon, etc. are all 10-bit, right? No 10-bit, no HDR either. As for frame rates, Netflix and Amazon are testing 60fps content. YouTube already has 4K60 content. NHL and NFL streams at 60fps... That's before any pr0n and home content (not implying the two are connected, LOL). Reply
  • npz - Wednesday, June 15, 2016 - link

    Also youtube supports 60fps. Makes a huge difference. Other homemade sources can easily be 60fps too like game footage or action cam. Even cell phones support 60fps now Reply
  • Eden-K121D - Wednesday, June 15, 2016 - link

    Vizio P series does Reply

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