Re: your 8800 GTX overclocks?
Getting max benchmarks in, say, 3dmark2006 I can go as high as 675/1070 and get a very high rating but stable in games? Nope. After 10-30mins it'll either freeze the game forcing me to warm-reboot OR blue-screen then force reboot itself.
For max stability I probably would stay lower than 650/1014.
As mentioned, is it worth an extra 2-3 frames/sec between 640/1014 and 675/1070 sacrifing system crashing? Nope.
Conroe E6700 @ 3.66Ghz (1.53V) Idle: 30c|Full Orthos Load: 53c || Thermalright A-120 Xtreme + AS5 Paste || OCZ 2gb PC8500 DC EL REAPER RAM || Asus P5W DH Mobo (2004 Bios) Idle: 37c|Full Load: 43c || EVGA 8800GTX ACS3 Cooling Edition (640/1040) Idle: 40c|Full Load: 67c || 2x10k Rpm WD SATA2 Raptor HDDs || Thermaltake Armour Full Tower w/side 250mm Mobo Case Fan || Thermaltake 850W PSU || WinXPSP2 || Forceware 169.17 || 3dmark2006 Score: 12,664 || SuperPi 2M Time: 34.5sec