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Old 2020-05-31, 20:36   #280
Prime95
P90 years forever!
 
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Aug 2002
Yeehaw, FL

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Quote:
Originally Posted by ewmayer View Post
Update on the power usage - I had been ... mclk = 1200 .... Dialed card 1 down to 1150 as well, that cut 20W off the usage, with the stated 1%-ish timing hit.
Was this savings measured at the wall or using rocm-smi?

I'm try to replicate with less success. Rocm-smi shows 3% power reduction (from ~170 to ~165) with an unknown speed penalty (still measuring).

Perhaps the 20W savings you see are 5W from the Radeon plus 15W from the PSU being more efficient.

BTW, for anyone else thinking of replicating your setup a platinum power supply will likely pay for itself in a reasonable time frame.

Edit: Runs 1.7% slower

Last fiddled with by Prime95 on 2020-05-31 at 23:05 Reason: added timing
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