GPU advice - Temperature and fan speed

[LupoLover]

Would anyone like to share their thourghts on GPU fan speeds and Temps?

I have a gtx 275 folding 24/7. I run fan at 80 percent to keep load temp at 70C. What temp should I allow it to sit at? Should I worry about burning fan out? What max fan speed for 24/7 use?

I have a case with 3 x 120mm fans so think thats ok (all the mounts I have).

If I have to underclock to keep in acceptable levels what should I underclock? Memory, shader or core?

 

[Biffa]

You can underclock memory and core, shader is all thats important for folding.

I wouldn't worry too much about burning the fan out. 70 sounds about right and you can always get a third party solution if you need to or if you just want quieter/cooler than stock