4 ms·

It's not a small performance hit. The card is throttling a lot and ramping up the fans up to 1000RPM more than usual because cooling fails completely. There wer

by onli 4y ago

It's not a small performance hit. The card is throttling a lot and ramping up the fans up to 1000RPM more than usual because cooling fails completely. There were report about cards failing while testing this (e.g. in the der8auer video), but ofc it's not possible to be sure that the card broke because of this. It's possible though. This is not an expected failure mode the engineers would have been okay with even if it did not kill cards. No one would be okay with the heatpipe drying up like this.

formerly_proven 4y ago
The card der8auer had which failed was very clearly a VRM failure.
- onli 4y ago
  That's not very re-assuring when the cooler is not working as expected. VRM gets killed by heat (I don't actually think it's likely that this is what happens here, but I do think AMD is making a mistake by letting customers run into this issue and by giving me reason to speculate like this).
  - tgtweak 4y ago
    I mean no VRM or vmem is meant to run at 110C sustained. The 3090 design had an issue with vram cooking leading to 105+ temps and the gpu would throttle when it got there. Many people that didn't mitigate that problem (with extra cooking) experienced memory failure. The main problem was vram temps aren't recorded so it looked like the GPU temps were fine. Source: everyone who mined Ethereum on a 3090.
    - runnerup 4y ago
      > everyone who mined Ethereum on a 3090. Most 3090's used for ethereum mining used reduced power load and temperatures. https://www.reddit.com/r/EtherMining/comments/q2v061/comment/hfnslen/?utm_source=reddit&utm_medium=web2x&context=3 https://www.reddit.com/r/EtherMining/comments/q2v061/comment... e.g. this guy: > That’s pretty terrible efficiency. I can get 120 with only 290W. For me the extra 4MH/s does not pay for 60W. Some individual enthusiasts were trying to get every last "megahash" for benchmarking bragging rights, but anyone who had a bunch of 3090's would minimize power consumption because the marginal profit on the last 50+ watts was negative, which had the nice side effect of lowering temperatures.
      - code_biologist 4y ago
        +1. I mined on a few 3060s (and heated my house) last winter. All with cores underclocked, memory overclocked, all at ~60C temperature wise, each consuming about 120W.
      - tgtweak 4y ago
        3090 on ethereum (even after undervolting/underclocking gpu and bumping vram frequency) was hitting 100+C on VRAM. You went from 95MH/s to 120MH/s by doing this. Throttling happened at 110C so you wouldn't notice it on hashrate unless you had really poor cooling. It was causing premature failure on vram even in the first months of use at these temperatures. If you put some extra heat syncs on the card and got vmem down to ~90C you had no issues. Almost all miners were doing this. If you didn't cut back the gpu voltage/clock it would increase vram temps to 100+ even at stock vmem frequency. GPU core temps dropped by 25-30C when underclocking/undervolting and power would also go down by 60-80W.

by onli 4y ago

formerly_proven 4y ago

The card der8auer had which failed was very clearly a VRM failure.

onli 4y ago
That's not very re-assuring when the cooler is not working as expected. VRM gets killed by heat (I don't actually think it's likely that this is what happens here, but I do think AMD is making a mistake by letting customers run into this issue and by giving me reason to speculate like this).
- tgtweak 4y ago
  I mean no VRM or vmem is meant to run at 110C sustained. The 3090 design had an issue with vram cooking leading to 105+ temps and the gpu would throttle when it got there. Many people that didn't mitigate that problem (with extra cooking) experienced memory failure. The main problem was vram temps aren't recorded so it looked like the GPU temps were fine. Source: everyone who mined Ethereum on a 3090.
  - runnerup 4y ago
    > everyone who mined Ethereum on a 3090. Most 3090's used for ethereum mining used reduced power load and temperatures. https://www.reddit.com/r/EtherMining/comments/q2v061/comment/hfnslen/?utm_source=reddit&utm_medium=web2x&context=3 https://www.reddit.com/r/EtherMining/comments/q2v061/comment... e.g. this guy: > That’s pretty terrible efficiency. I can get 120 with only 290W. For me the extra 4MH/s does not pay for 60W. Some individual enthusiasts were trying to get every last "megahash" for benchmarking bragging rights, but anyone who had a bunch of 3090's would minimize power consumption because the marginal profit on the last 50+ watts was negative, which had the nice side effect of lowering temperatures.
    - code_biologist 4y ago
      +1. I mined on a few 3060s (and heated my house) last winter. All with cores underclocked, memory overclocked, all at ~60C temperature wise, each consuming about 120W.
    - tgtweak 4y ago
      3090 on ethereum (even after undervolting/underclocking gpu and bumping vram frequency) was hitting 100+C on VRAM. You went from 95MH/s to 120MH/s by doing this. Throttling happened at 110C so you wouldn't notice it on hashrate unless you had really poor cooling. It was causing premature failure on vram even in the first months of use at these temperatures. If you put some extra heat syncs on the card and got vmem down to ~90C you had no issues. Almost all miners were doing this. If you didn't cut back the gpu voltage/clock it would increase vram temps to 100+ even at stock vmem frequency. GPU core temps dropped by 25-30C when underclocking/undervolting and power would also go down by 60-80W.