Don't try to push the core so hard. It's the shaders that count. If you want to get into volt modding, get in touch with P_O_S_PC. My 8800GTS runs at 670/1890. 100% stable, and that's what counts for me.
GPU2
Ah, yes. I've spent so much time with Fermi's I forget that in the 8800 the core and shaders aren't linked. I'll reduce core and increase shaders.
Also, my 2600K BSODed after about 8 hours of folding @ 4.8Ghz. I decreased it to 4.7, and its been folding good for over 24hrs now.
I also started folding on my 470 on that rig. So, the drop in 100Mhz combined with the overhead of a GPU client increased my TPF on a 2684 from 35:30 to 36:56. I'm not too bothered as I'm getting over 40K from that rig right now.
Also, for a bit this past month I was a little financially tight, but things have worked themselves out. So, it seems I might be able to put my tax returns toward another bigadv rig.
Also, I no longer feel the need to sell my 470 for cash. However, I'm thinking that I might still sell it and pick up two 460s instead. That'll be a good 6-8k PPD more and shouldn't be more than 20-40 bucks cash on my end.