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Author Topic: HD6850 Memory clock  (Read 1588 times)
tekwarrior
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June 12, 2011, 10:31:08 AM
 #1

I got a new HD6850 by Sapphire and tried to OC the GPU while lowering the the memory clock, as was suggested by a thread in the Mining forum.

I tried both MSI Afterburner and Trixx and still I can't really lower the memory clock of my graphics card. Both tools allow me to set a lower clockrate but the memory clock seems to be stuck at 1000 MHz anyway (at least that's what the graphs are showing; temperature and current aren't dropping either).

Does anyone have a similar experience or is it just impossible to lower the memory clock on this card?
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SimBesh
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June 12, 2011, 10:45:24 AM
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same problem here, don't worry too much about lowering the memory, only really helps save heat
950 mhz on the core = ~248 MHashs
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June 12, 2011, 10:52:29 AM
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i wouldnt agree, i got a MSI R6870 Twin frozr and it runs very cool. right now its at 34C with 1000 gpu and memory clocks. 297mhash/s.

lowering the memory will also allow more electricity to get to the gpu, and the fans spin less and take less wattage so more power for the gpu.

the lowest i can take my card is 10mhz on the memory. according to amdoverdrivectrl in linuxcoin.

tekwarrior
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June 12, 2011, 10:57:47 AM
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Oh I don't care too much about increasing the MHashes/s but reducing the temperature would probably be good as it's at the 91°C right now. At least I'm not the only one with this problem.
tekwarrior
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June 15, 2011, 11:49:13 PM
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I finally managed to lower the memory clock on my card using ATI Tray Tool!  Smiley

Also I tweaked air flow a bit and I am down to 72°C now with 1028/425 Mhz on stock voltage with stock cooler, also getting about 270MHashes/sec. Seems running fine too for about 30 minutes now, will see if it stays this way.
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