[Asus P5k-SE] NB Volatge + Link Width

[tofuartist]

Heys,
I am looking to increase my Northbridge voltage but I cannot find the option in my BIOS. I have an ASUS P5k-SE. BIOS version 0401.

Another thing, my GFX Card [8800GT] is running at the link width of x2, not x16. I have read people have plugged their GFX Card into the wrong PCI-e x16 slot but I only have one. So I am trying to increase my NB voltage.

I have also tried increasing PCI-e frequency but it doesn't help.

System Specs:
E6600 @ 3.2ghz
ASUS P5k-SE
Antec TP3 430w
Gainward 8800GT

Don't tell me my PSU is too low unless you are 99.9% sure. Because it has worked for these few months w/o dying.

Any help?