There's a nice app for instant feedback on changes, unfortunately it does not work with cards after GTX 295. http://cuda-z.sourceforge.net/
So the only reason we increase the core clock now is because it's hard linked to the shaders? On the old cards they were not linked, right? I actually have an old 8800 GT from one of our buddies in the old Dell rig, and I should try this on it!
What's a good "safe" max temp for these older GPUs to handle?
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Exactly. This was my first big blow when holding the 570 in my hands and I realized shader and GPU now are linked, just as on ATI... For crunchers it just was perfect before. 'Just' been missing a project with return.
I really forgot the temps I had, sorry. But they should not get really hot with POEM. If they do nevertheless, I would not OC them as this would indicate they are using more juice compared to big new cards.