Post
Topic
Board Mining (Altcoins)
Re: PhoenixMiner 5.5c: fastest Ethereum/Ethash miner with lowest devfee (Win/Linux)
by
apocalypse_milk
on 10/03/2021, 16:06:46 UTC
Hi, hoping for some help with 1 of my 3090's I use for mining. Using v5.5c.
The problem I'm having is as soon as it hits around 60c temp, the performance drastically goes down. For some reason the card stops pulling the usual ~350 watts and only draws ~270 watts after 60c ish temperature is hit. I have a 2nd 3090 which pulls much higher, has no monitors plugged into it and draws around 400 watts. That card will happily go up to 66-67c temps and remains at the 400 watts draw. I'm really scratching my head with the first 3090. It hurts watching it's hshrate go from 120mh to 90mh just because the temp climbs from 56c to 60c lol. Meanwhile the 2nd card doesn't seem to care about temperature and will chug away doing 122mh with 400 watts.
If you need any extra information such as logs, OC settings etc then please let me know and I can provide them.

Your card is being thermally throttled due to the extremely high memory junction temperatures reaching 110 C. The GPU core will remain core during mining as it is not primarily in use. Check GPU-Z or HWMonitor or HWInfo64, you will see the thermal throttle and the high memory junction temperatures.