Re: EVGA GTX 570 overclocking issues.
Then again, a 3 year old 620watt power supply is probably not quite cutting it when you factor in the overclocking. I mean by the time you factor in your nice CPU overclock, you are just drawing too much when you overclock the card. Its not that you dont have enough overall juice because you are likely drawing in the low to mid 400 watt range, but just too much from a specific rail. I run a similar setup to what you have but with an 850 and I have no power issues at all.
Mobo ASUS Rampage III Extreme | CPU Intel i7980X @ 4Ghz | Mem 6GB Corsair XMS3 DDR3 | Vid EVGA GTX570SC 875/1750/4300 | WD VelociRaptor 300GB,WD Raptor 150GB, WD Caviar Black 640GB SATAII HD, Seagate 160GB 7200RPM SATA HD |Liteon SATA DVDRW | Logitech Z-680 speakers|Dell 20" 2005FPW LCD | O/S Windows 7 Ultimate 64bit :: Dell XPS Gen2, 2Ghz PentiumM, 2GB Ram, go7800GTX at 430/1200, 100GB HD, WinXP Pro SP3