AMD: R9xx Speculation

Discussion in 'Architecture and Products' started by Lukfi, Oct 5, 2009.

  1. keritto

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    How hard is to read the whole section? :roll: (and avoid to prejudicially misquote)
     
  2. Shtal

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    Since ATI dies after HD5870, AMD makes new rulers with CaymanXT - making GPU up to 300W DTP.
     
  3. GZ007

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    The 6870 has 65% more shader troughput than 6850 and ends 15% faster in vantage :roll:
    Overclocking the 6850 to 900 MHz could be more than enough to reach that (and for a lot cheaper).
     
    #3243 GZ007, Oct 16, 2010
    Last edited by a moderator: Oct 16, 2010
  4. SimBy

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    If those Vantage and 3D mark 06 numbers are legit it's actually more like 40%. Remains to be seen how it does in games.
     
  5. Jawed

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    That site shows no evidence of having official information of any kind, merely some pictures of cards. I think the specifications are pure speculation.

    Additionally the Futuremark numbers appear to be a scam. Compare the numbers to those linked way back here:

    http://forum.beyond3d.com/showpost.php?p=1480635&postcount=2847

    3 of the 4 scores are identical, with only HD6870 Vantage P being different: old = 16270 and new = 17083.
     
  6. AnarchX

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    It seems to turn out that was only a 800SPs @ 650MHz evaluation or developer sample.
    According to Fuad and the pictures of XFX HD 6800 boxes, final HD 6850 clocks 775MHz and has 960SPs.
    This allows a boost of ~34% over this sample card.
     
  7. jimbo75

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    How can there be a total lack of solid information < 1 week before release?

    Have they put a 6-series block in the old drivers and are going to release the working ones with a steam update? :p
     
  8. DarthShader

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    65%? I calculate only 42%, did I miss something?

    Anyhow, this would show vantage isn't compute bound. 42% in shader output and only 5% in memory gives 15% faster vantage. I wonder why didn't they specify the mem clock at 1200mhz, like cypress. Maybe because it would end up faster? :wink:
     
  9. AnarchX

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    If HD 6870 and HD 6850 have both 960SPs and only the clocks differs, there could be differences on other parts.

    ROPs: HD 6870 32, HD 6850 24 (needs changes in architecture)

    Tessellation: HD 6870 4 triangles every 5 clocks, HD 6850 3 triangles every 5 clocks http://forum.beyond3d.com/showpost.php?p=1482643&postcount=3210
     
  10. Jawed

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    Link? I don't know of any pictures that have legible specifications.
     
  11. AnarchX

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    http://vga.zol.com.cn/199/1999722.html

    But only clock rates are "confirmed" by these: 775M and 900M.
     
  12. Mize

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    I'm sorry, but I find myself totally uninterested in Barts (although I realize it's the money maker). Aren't there ANY good leaks on Cayman??
     
  13. Kaotik

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    Assuming the numbers are right, Barts is...
    ...40% improvement on perf/mm^2 compared to Cypress...
    ...12% improvement on perf/mm^2 compared to Juniper...
    ...15.6% improvement on perf/watt compared to Cypress...
    ...8% improvement on perf/watt compared to Juniper...
    ...in 3DMark Vantage

    (Edit: assuming 155W TDP for Barts, which may be over or under that in reality)
     
  14. Mianca

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    Based on the Vantage scores, Barts XT delivers ~32,3% better performance than [strike]Cayman[/strike] Cypress XT per mm² and clock.

    If Barts Pro has indeed 960SPs, wouldn't that render The_Mask's idea of 1120SPs for Barts XT rather probable after all? (though I still don't like his Cayman/Antilles specs).
     
    #3254 Mianca, Oct 16, 2010
    Last edited by a moderator: Oct 16, 2010
  15. ferro

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    It's odd that their table on page 1 says 725MHz, whereas the sticker on their box shot indicates 775MHz. I wonder if the rest of the table on page 1 is correct...
     
  16. Kaotik

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    Check your math, per mm^2 the vantage score is just slightly over 40% better than Cypress XT's. (I'm assuming your Cayman XT there is a typo meaning Cypress since there's no Cayman XT to be seen)
     
  17. Jawed

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    Thanks.

    Yet another nail in that coffin.
     
  18. Mindfury

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    #3258 Mindfury, Oct 16, 2010
    Last edited by a moderator: Oct 16, 2010
  19. trinibwoy

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    Are those numbers from the same part of the game? If you look at reviews BFBC2 numbers are all over the place depending on what the reviewer tested.
     
  20. Harison

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    Since those numbers are barely better than 5770, I very much doubt them. Of course there could many reasons for such score, like diff. scene, drivers, etc., but still IMO Barts will perform better from the get go.
     
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