Here to chat about hardware and cooling

[rahrahrah]

Hi,

Hoping to be able to post in the Hardware > mining forum at some point. I've a dual 7990 system and am having trouble with cooling and stability despite trying many various cgminer settings and having an open case.

It's really frustrating as every day lost counts!

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[toroidmonster24]

Care to explain which 7990s, and what your Motherboard slot setup is? Do you have 2 free slots between your PCIEs?

Also it might not hurt to put a custom cooler on the first 7990 as that one will get significantly hotter. I did not mine with 7 series, but I did do it with the 5 series back on a slower board with only 1 free slot in between. The lower card could tolerate far more OC and there was an easy 10C if not more difference.

[2RoyalSox]

The 7990 gets such great hashrate because of what it is. Not one, but two GPUs running on the same card. Meaning twice the heat coming off of them, as well as additional fan noise, and the possibility for one core being less stable than the other.

Are you dropping the voltage at all? This can make a huge impact on heat (undervolting can make it much cooler).