Undervolting 6990

[mdawg]

I have a 6990 and it i as a biatch to keep cool.  I have underclocked the core and lowered the intensity a lot just to keep this thing from frying.  What is safe and what is common practice for undervolting this card.  Thanks.

[1714886554]

1714886554

[Isokivi]

I have a 6990 and it i as a biatch to keep cool.  I have underclocked the core and lowered the intensity a lot just to keep this thing from frying.  What is safe and what is common practice for undervolting this card.  Thanks.

If I remember correctly the only way to do this is to hack the bios. I had one years ago, luckily it had the dual bios switch, because I never got the bios I chopped together to work. The post that lead me to try is still somewhere on these forums, wish the search function was better. The search term "6990 bios" seems to bring up some relevant posts, gl.

[infinitybo]

@Mdawg You need to be safe with the "underclocking" because once below the speed limit anything can happen.

[mdawg]

Thanks for the advice about the underclocking.  It has been hashing at 100mhz underclocked on the core for the last week and I was under the impression underclocking was no big deal and undervolting was something I needed to know what I was doing and not just start guessing.