AMD / ATI Radeon HD5800 -review thread

Discussion in '3D Hardware, Software & Output Devices' started by Kaotik, Sep 22, 2009.

  1. swaaye

    swaaye Entirely Suboptimal
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    4890 has GDDR5. My 4670 uses GDDR3. It runs 150/300 or so when idle and running just one output. Turn on another monitor and it runs 150/1000 instead.

    They didn't mess with GDDR5 clocks when idling with the 4xxx series.

    I also have a 3850 and it doesn't change RAM clocks at all. I tried messing with that once by reprogramming the BIOS clocks and discovered that when the RAM clock changed, the second output will flicker/flash.
     
  2. homerdog

    homerdog donator of the year
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  3. Dave Baumann

    Dave Baumann Gamerscore Wh...
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    This has always been the case with PowerPlay. To change memory speeds you do it within a VBLANK of the panel, but to do that with two panels is difficult as the panels can be timed differently and hence you'll see flickering on at least one when the speed changes.

    I'm not sure where you are getting that it consumes more than RV790 (with dual panel) in this case - the memory PHY's are actually more efficient.
     
  4. Tchock

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    Trini aren't those 2 sentences you quoted separate? I read out quite a different idea :grin:

    And I wonder how it would eventually fare with drivers. A 10% boost = 1.65X 4890, 20% boost = 1.8x 4890... ey?
     
  5. trinibwoy

    trinibwoy Meh
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    Which two sentences? He made two different points so I addressed them separately :)
     
  6. Silent_Buddha

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    Wouldn't it have at least been possible to keep the GPU speed at 150 however? Rather than raising it to 400?

    Regards,
    SB
     
  7. Broken Hope

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  8. WaltC

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    But if GT300 is a huge monster of a chip that yields very low and costs 40% more as a result then I think ATi's margins will be safe for awhile...;)

    Btw, your progression of Voodoo 1 > Voodoo 2 > Voodoo 2 SLI > Voodoo 3 3000 > Voodoo 5 5500 > GeForce 3 Ti200 > GeForce 4 Ti4400 > Radeon 9700 Pro > Radeon 9800 Pro > Radeon X800 XT > GeForce 6800 GT > Radeon X1800 XT > Radeon X1900 XT > Radeon X1950 XTX > GeForce 8800 GTX > Radeon HD 4870 > GeForce GTX 285...is pretty much identical to mine if you eliminate the GeForce 6800 & up cards and substitute 2x 4850 for your HD 4870...;) Been a long road, eh? Kind of makes me all wistful and nostalgic. I'll probably spring for a 5850, though--eventually.
     
  9. thatdude90210

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  10. Richard

    Richard Mord's imaginary friend
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    Carmack doesn't like tessellation: last time he talked about this he mentioned how he thinks current mesh complexity is too low for worthwhile tesselation.
     
  11. trinibwoy

    trinibwoy Meh
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    HD 5870 CF review - http://www.guru3d.com/article/radeon-hd-5870-crossfirex-test-review/

    Yaaay, Carmack agrees with me :lol: Sxotty, yeah it is noticeable but like I said it doesn't make sense to make an awesome round air filter when the rest of the detail in the model is simulated with flat textured polygons.
     
  12. Tchock

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    AFAIK aren't most devs still using archaic polygon modelling?

    The CG world has switched to NURBS and Sub-D surfaces quite some time ago and has never looked back :lol:
     
  13. Arty

    Arty KEPLER
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    This post is purely IMO.

    I can compare the 5800 launch reaction to the launch reaction of the Geforce 7800 series in regards to the performance. The only differentiator back then was that there was no X2 product present in the previous generation.

    However 5800 series added a whole lot of features that the 7800 was missing, so I'd put this one above that but lower than G80 & R300.
     
  14. gongo

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    The CFX review shows how much of a monster 5870 is..just some resistance to jump in. Maybe ATI need a big game to push their GPU launch next time...also anyone noticed monitors upgrades have slowed down, it was 1920x1200 2 years ago and still 1920x1200 today...for the upper echelon, most are just happy with 1680x1050 22" monitor, another resistance to upgrading the latest and greatest.
     
  15. Sobek

    Sobek Locally Operating
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    I love that even a highly clocked i7 965 can be a bottleneck on these cards. I'm running a single 4870 at the moment, and I was planning to nab another one shortly as the prices plummet (and we know they will - further!), but hot damn I think I might just get a 5870 and throw the 4870 into my gaming / media PC.

    Now if I can just get my hands on another 24" FW900...
     
  16. ants

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    Does Eyefinity work on Windows XP or is it only a Vista/7 thing?

    I'm thinking of grabbing two Dell 2408WFP monitors to go with my 2405, anybody have any strong feelings about the 2408 (I hear something about input lag but not sure if it's an issue or fixed in current revisions)?

    Thanks
     
  17. wishiknew

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    Eyefinity is no go on XP I think.

    hardforum is the place to go for display opinions. Don't think they talk about the 2408 much anymore. Ejected my 2405 for a same size tn panel last year. Thinking of going back up to a U2410(there is a special game mode that bypass electronics and further cuts down input lag)
     
  18. Psycho

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    Haven't seen This Batman AA benchmark w. high physx from the Driverheaven review mentioned yet. With the higher combined load the pure gpu based solutions fall behind, but as they mention the cpu load is obviously lower, as it's better capable of recording fraps video.

    At least it gives more me respect for the physx cpu fallback implementation - it looks like it's not always single threaded and super slow anymore.

    :runaway::runaway::runaway::runaway:

    But maybe it will be fixed in the next patch ;)
     
    #218 Psycho, Sep 26, 2009
    Last edited by a moderator: Sep 26, 2009
  19. Cuthalu

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    Has there been any word about whether the 5850's cooling solution is going to differ from 5870?
     
  20. Kaotik

    Kaotik Drunk Member
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    Seems to be same basic design on everything from 5850 to 5870X2, obviously fan speeds will differ somewhat, and the heatsinks will be different sized
     
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