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Title: Identical 1080ti rigs, different performance Post by: david987 on January 25, 2018, 12:51:31 AM They all have the same: Hardware, OS (Win 10), BIOS version and settings, nvidia drivers, risers, miner & arguments.
The only difference I found between them is that in the low performing one, GPU-Z shows 3.3GB under 'Memory usage (dedicated)' vs 480MB on the high performance ones. Virtual Memory is set to 35gb on all. There's a 5-10% difference in performance, doesn't matter which algo or miner is used. Not sure where else to look. Title: Re: Identical 1080ti rigs, different performance Post by: treespace on January 25, 2018, 03:05:48 AM If it's between just two 1080ti's 5-10% could be within the natural variance between particularly good/bad chips.
Another factor could be as simple as temperature. Depending where you put the rigs one might have better cooling (i.e. on a cold window sill vs in a closet.) Title: Re: Identical 1080ti rigs, different performance Post by: david987 on January 25, 2018, 03:16:41 AM It's 6x1080ti rigs, they're all the same cards. Swapped some of them out to confirm it's not the cards.
Funnily enough the rig with lower performance runs around 5-6 degrees cooler per card (better airflow) Another difference I found is that the memory commit size is 22.4GB/38GB, vs 5GB in the other rigs. |