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New 5850 clocks.

Discussion in 'AMD / ATI' started by TheMailMan78, Mar 22, 2010.

  1. TheMailMan78

    TheMailMan78 Big Member

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  2. DirectorC

    DirectorC New Member

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    Confused about the 400MHz default clock.
     
  3. TheMailMan78

    TheMailMan78 Big Member

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    Bug Im sure. Anyway Im getting 54c at idle
     
  4. DirectorC

    DirectorC New Member

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    If you can get through several rounds of your favorite game on all high without crashing then it should be safe :)
     
    Soylent Joe says thanks.
  5. exodusprime1337

    exodusprime1337

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    i would say it's safe.. i would move the fan speed up a bit, i run mine at 1.29v at 1050Mhz on the core of my 5870 and i idle in the low 40's and load at about 68-70 with the fan on 65%
     
  6. jasper1605

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    I've got my toxic running at 920/1320 w/ F@H on 1.088 volts so you should be fine. I'd do what prime said though and up the fan speed a bit just to keep things a little cooler :)
     
  7. DirectorC

    DirectorC New Member

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    I can't stop raving about Afterburner's custom fan profile. It does an OC good.
     
  8. jasper1605

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    it is real nice. Too bad fan control is the only thing that works w/ the toxic cards. All the clocking I have to use AMD gpu clock tool lol
     
  9. MatTheCat New Member

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    I find that when you use a linear fan profile, you get stuttering in 3d applications as the fan jumps around to suit different speeds.

    In order to avoid this, I need to set the fan at a uniform speed. With my Afterburner overlcok (HD5850) of 1.6volt, 900MHZ on GPU, and 1135MHz on Mem, I find that a fan speed of 65% keeps my GPU at around 60 C, under load.

    The annoying thing is however that I don't know how to assign the fan speed to a profile, which means I got change it manually every time I choose to game (or sit with wind tunnel in room the whole time).
     
  10. digibucc

    digibucc

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    my trip X is 940/1200/1.125 on high overclock

    my normal overclock is 899/1180/1.125

    both are cool and stable, I have to assume 900/1200 is as well :)
     
  11. DiMeLo

    DiMeLo

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    I run a 5850 930/1200 stock volts fan on auto and the card never breaks 62c.
     
  12. erocker

    erocker Super Moderator Staff Member

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  13. jasper1605

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    I think you can tone down your voltage a little bit with those clocks. Most cards should be able to pull that on stock voltages or maybe a very tiny bump :)
     
  14. MatTheCat New Member

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    From my experience you are way beyond the point of 'purposeful returns' in terms of the performance that you will get. I copied your clock, but as I was working up towards it, I noticed strong diminishing returns and much higher temps occur around the 950MHz on the GPU mark.

    On Heaven (Maxed out 0FSAA 4AA DX11 Tesselation Enabled):
    @ (stock) 1.087v, 725/800 = 33.9/853 points
    @ 1.137v, 900/1135 = 39.4FPS/993 points

    So a very worthwhile overclock here with the GPU sitting at 69C under load (fan speeds set to AUTO)

    @ 1.16v, 950/1200 = 40.7FPS/1025 points

    The above overclock however sends the GPU temp way up to 80C under load (fan speeds set to AUTO). Although I could have altered the fan speeds in order to safely maintain this clock and indeed clock it even higher, it seems to me that the end product (i.e. actual increase in performance) just is not worth all the extra strain being put on the equipment.
     

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