PowerVR Series 6 now official

Discussion in 'Mobile Graphics Architectures and IP' started by roninja, Sep 10, 2010.

  1. Lazy8s

    Veteran

    Joined:
    Oct 3, 2002
    Messages:
    3,100
    Likes Received:
    18
    The integration of ray tracing with the PowerVR rasterization pipeline, both hardware and software, should be a focus of Imgtec at this year's GDC.

    A mention at MWC 2014:

    http://youtu.be/QTuf3ed0Jo4
     
  2. Lazy8s

    Veteran

    Joined:
    Oct 3, 2002
    Messages:
    3,100
    Likes Received:
    18
    The GX6650 has been getting attention as a competitor to Tegra's Kepler, but it's not likely to be its contemporary. The 6630 should be a closer match in terms of end product availability, and it should still bring with it quite a few of the 6650's competitive attributes like the six count of clusters and the "power gearing" and "triple compression" technologies (albeit in earlier, um, incarnations).

    It won't have some of the significant architectural Series 6XT upgrades like the extra FP16 capacity and, perhaps of even greater impact, what I presume would be the rebalanced throughput characteristics of the XT refresh like potentially more triangle set-up, texture filtering, z units, etc. Hopefully, some of that was upgraded on the 6630 from earlier cores like the 64xx anyway, though.
     
  3. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    Allwinner A80 results are on/off lately so in case they don't stick this time for whoever might be interested:


    http://www.glbenchmark.com/device.jsp?benchmark=gfx30&os=Android&api=gl&D=Allwinner%20A80-EVB

    http://www.glbenchmark.com/device.jsp?benchmark=gfx27&D=Allwinner+A80-EVB&testgroup=overall

    Also first Mediatek MT6595 have appeared:

    http://www.glbenchmark.com/device.j...id&api=gl&D=MediaTek+MT6595&testgroup=overall

    I'd expect frequencies between the two to be comparable (MT6595 GPU is at 600MHz) and the difference in performance being mostly due to A80= G6230 vs. MT6595= G6200.

    On a sidenote I'm still wondering WTF happened with the MT8135 tablet SoC; considering how much the MT6595 has advanced it might be an idea to use that one for tablets instead if that's even possible. As it stands if the 8135 doesn't get a higher GPU frequency it's going to pose pretty poor against the A80.
     
  4. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
  5. Lazy8s

    Veteran

    Joined:
    Oct 3, 2002
    Messages:
    3,100
    Likes Received:
    18
    Comparing that UltraOcta A80 to Apple's A7 highlights just how limited these early Rogue cores become in the GfxBench 2.7 test.

    Despite the Apple A7's GPU having double the clusters, the higher clock rate of the UltraOcta's G6230 pushes it to the higher frame rate for that particular GLES 2.0 workload. GLES 3.0 is obviously a different story.
     
  6. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    The 6430 in the A7 is clocked around 450MHz, while the 6230 in the A80 at least at 600MHz if not more.

    Rys confirmed that Manhattan is quite ALU bound. It would be a disaster if future games wouldn't be, otherwise all ULP GPU vendors would had placed their bets wrong.
     
  7. tangey

    Veteran

    Joined:
    Jul 28, 2006
    Messages:
    1,406
    Likes Received:
    149
    Location:
    0x5FF6BC
    #507 tangey, Apr 16, 2014
    Last edited by a moderator: Apr 16, 2014
  8. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    Those alpha blended fill rate tests in gfxbench3.0 don't help to estimate frequencies. The A80 gets roughly the same fillrate result; 4 vs 8 TMUs so assuming the A7 GPU is clocked around 450MHz it's either 900MHz for the A80 6230 (highly unlikely) or they're just cheating.

    Fill-rate offscreen
    iPadAir = 2929 MTexels/s (8 TMUs)
    A80 = 2917 MTexels/s (4 TMUs)

    Alpha blending offscreen
    iPadAir = 6185 MB/s
    A80 = 4354 MB/s

    The alpha blending results could suggest a 600MHz frequency for the latter (vs. 450MHz on the A7), but the fillrate results sound like a dead end for now.
     
  9. Helmore

    Regular

    Joined:
    Apr 5, 2010
    Messages:
    466
    Likes Received:
    0
    What about differences in efficiency and bottlenecks between the PowerVR 6230 and 6430?
     
  10. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    I haven't the slightest idea how bandwidth looks like on A7 and even more so for A80 to have another important factor to think of.

    The Manhattan test in GFXbench3.0 is quite ALU bound.

    Apple A7 GPU G6430@450MHz (?)
    4 * 64 * 0.45GHz = 115.2 GFLOPs FP32 ---> 13.2 fps (peak)

    Rogue Han GPU G6230 = 11.4 fps

    11.4 / 13.2 * 115.2 = ~100 GFLOPs FP32 / 128 ALU lanes = 0.78GHz = 780MHz

    Now I believe that kind of frequency in an ultra thin tablet with an A80 when I see it. If any manufacturer can achieve it with a reasonable battery size and battery life in an ultra thin tablet all hail to Allwinner. In any other case "boo" as I'd react for any other player who tries to win impressions in benchmarks with unrealistic conditions.
     
  11. Lazy8s

    Veteran

    Joined:
    Oct 3, 2002
    Messages:
    3,100
    Likes Received:
    18
    The limiting factor in the T-Rex test has been covered here before, so the Allwinner A80 advantage over the Apple A7 makes sense there.

    The improving Manhattan results for the A80 suggest some combination of perhaps, as mentioned, higher and higher frequency testing of the platform, possibly a different limiting factor for that test starting to take over at the higher frame rates, and/or, more optimistically, a good hardware and software implementation for the A80 platform in regard to drivers, available bandwidth, etc.
     
  12. tangey

    Veteran

    Joined:
    Jul 28, 2006
    Messages:
    1,406
    Likes Received:
    149
    Location:
    0x5FF6BC
    I'm assuming those recent A80 Glbenchmarks were achieved using this board:-

    http://www.cnx-software.com/2014/04...-systems-products-to-become-available-in-may/

    Skip to around 5:45.

    "This is a board designed to show the maximum performance of A80"
    Fan on top of the chip.

    The video is a nice overview of Allwinner's products. Personally, I find that video blogger's accent/interview technique very irritating.

    "is this secret".." is this special"
     
  13. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    The best part is when he asks if they use the board to cheat, cause it has a fan. If they are using frequencies that cannot be sustained without active cooling then the GPU is not "similaah" to Apple's GPU :razz:
     
  14. jlippo

    Veteran Regular

    Joined:
    Oct 7, 2004
    Messages:
    1,276
    Likes Received:
    358
    Location:
    Finland
  15. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    Somewhat OT but I albeit I'm all for changes and progress I can't say I'm all too crazy about the new IMG homesite layout.

    A ducklin is sexy by itself; it doesn't need to accessorize:

    [​IMG]
     
  16. Pottsey

    Newcomer

    Joined:
    May 26, 2002
    Messages:
    65
    Likes Received:
    2
    Location:
    Nottingham UK
    The new website is terrible at high resolutions. What is it with so many website recently being designed like this? 50% of my page is empty with harsh white. At 4k resolutions it looks like around 75% of the page would be empty white.

    It my mind it doesn’t look good for a graphics company that’s about tomorrows technology to have a new website that doesn’t factor in tomorrow or todays resolutions. Its like a website designed for 5 years ago.
     
  17. Lazy8s

    Veteran

    Joined:
    Oct 3, 2002
    Messages:
    3,100
    Likes Received:
    18
    The layout fits pretty well on my phone's display, recognition of the prevalence of mobile browsing usage these days.
     
  18. Ailuros

    Ailuros Epsilon plus three
    Legend Subscriber

    Joined:
    Feb 7, 2002
    Messages:
    9,408
    Likes Received:
    172
    Location:
    Chania
    Then they obviously need something that fits them all and no it's not rocket science either to either scale content on a webpage according to resolution or just have a mobile and desktop variant of each page.
     
  19. wco81

    Legend

    Joined:
    Mar 20, 2004
    Messages:
    6,163
    Likes Received:
    250
    Location:
    West Coast
    Any reason to believe that with Nvidia and now AMD, IMG will fall behind in mobile GPU performance?
     
  20. Grall

    Grall Invisible Member
    Legend

    Joined:
    Apr 14, 2002
    Messages:
    10,801
    Likes Received:
    2,170
    Location:
    La-la land
    I don't think so. IMG is the only player in town with TBDR, which is ideal for mobile. That'll give them a clear edge methinks.
     
Loading...

Share This Page

  • About Us

    Beyond3D has been around for over a decade and prides itself on being the best place on the web for in-depth, technically-driven discussion and analysis of 3D graphics hardware. If you love pixels and transistors, you've come to the right place!

    Beyond3D is proudly published by GPU Tools Ltd.
Loading...