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Title: O/Cing lowers Mhash Post by: staraptor on June 21, 2011, 05:04:04 PM Anyone else had this? At around ~880 clock, the cards I have been using are pushing around 350Mhash. When I bump the clock rate up higher, say 900+, the mhash rate goes down (sometimes by nearly half).
Title: Re: O/Cing lowers Mhash Post by: zargon on June 21, 2011, 05:04:52 PM Anyone else had this? At around ~880 clock, the cards I have been using are pushing around 350Mhash. When I bump the clock rate up higher, say 900+, the mhash rate goes down (sometimes by nearly half). are they being throttled down due to heat? Title: Re: O/Cing lowers Mhash Post by: staraptor on June 21, 2011, 05:49:01 PM doubt it - it's simply a matter of when I increase the clocks, the Mhash drops o.O heat was at 74c
Title: Re: O/Cing lowers Mhash Post by: c0m47053 on June 21, 2011, 05:59:01 PM Perhaps the card is just unstable at that clock. Does Furmark (http://www.ozone3d.net/benchmarks/fur/) or similar run without artefacts?
Title: Re: O/Cing lowers Mhash Post by: MBH on June 21, 2011, 06:04:29 PM Which card are you using?
Some cards' firmware throttles the processing to reduce emitted heat, as already mentioned. |