Originally Posted by
GoldenTiger
I think my PSU (Corsair HX 520w) is not strong enough for my rig :(... when I overclock much past 720ish my computer has the screen go black a time or two, or just locks while on the desktop, even though Rivatuner shows the temperatures as 50ish for my SLI pair. I have upgraded air cooling (Thermaltake ND1's). Also having it lock if I go into 3D when overclocked, though I can run the Crysis GPU bench over and over without issue at its 675/1950 "KO" speeds. Another thing that's making me think it's the PSU is that ATItool can heat the cards up to about 66, but it locks sometimes after 5-6 minutes, sometimes after 1-2, even when the temps aren't as high as it's gone before without locking.
My system is:
Q6600 @ 3.15, 1.53v
2x eVGA 8800GT KO 512MB in SLI
2 hard drives
eVGA 680i NF68-A1 SLI motherboard
4x1GB RAM sticks
7 120mm case fans, plus two 80ish-mm fans that the aftermarket coolers use
Optical drive
X-fi sound card
Not sure if it's just a really bad set of cards for overclocking, or if it's just too little power from my Corsair HX 520w PSU :(... any thoughts? It seemed iffy in the beginning, now I'm thinking it actually isn't enough.