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Title: 7950 powerdraw Post by: kqpahv on April 23, 2013, 10:20:51 AM Hi everyone !
Was wondering if fellow miners who are using 7950's could share their powerdraw. I am currently mining litecoins with 3x7950 with a seasonic x 1050W gold plus PSU and I am drawing 800watts from the wall for 1800Mhash. I saw a topic where user Tacotime stated hes only drawing 625w for 1800Mhash on a equivalent rig. My cards are running 1085mhz -gpu / 1600Mhz - memory with Vcore 1125. Title: Re: 7950 powerdraw Post by: Chrisoldinho on April 23, 2013, 11:41:40 AM Try lowering the vcore if your card allows, I have 2 7950's producing 1100 khash/s at 925/1350 running 0.975mv (down from 1125mv using MSI afterburner), power draw at the wall is 415w, and this is with the highly inefficient FX-8350 as my processor. When running 1125mv I was around 500w IIRC, I have also lowered the memory voltage down to 1500 from 1600, stability seems the same and knocks a little bit more off the consumption.
There are many other benefits with this approach:- Reduced wear = Increased life expectancy Lower temps = Lower fan speeds HTH Title: Re: 7950 powerdraw Post by: kqpahv on April 23, 2013, 06:27:09 PM Thanks for your answer.
Well at the moment its still profitable to use an extra 185w for the 100+ mhash. At least with my electricity price 15cents per Kwh. Unfortunately I am not able to hit 550 khash per card with those clocks aswell. Only getting around 520-530khash. I think I figured out why he's power draw is so low. Seems he is keeping the rig at 3c ambient so all the fans can go really slow. |