Overclocking blue screen, of death

Hello, as the subject suggests I have had some problems with blue screens.
Specs:
Case: Antec 900
MB: Asus P5K Deluxe
CPU: Q6600
RAM: Mushkin 8500 2gb
GPU: ATI 1950 PRO
Sound: Creative SB Audigy
PSU: Corsair 620W
2 Harddrives, Maxtor's, 60gb and 80gb both IDE

The first problem I was having seamed to be with the ram. The mushkin forums helped me get that straight. (needed to adjust timings and voltage)
I have been using the pc for a few days since then with no problems. Then the other day I was just copying files to a USB drive while watching a video online and I got a blue screen. Said it was a hardware problem.
Its been suggested that because I was running at a FSB of 350x9 that I should up the voltage on the Northbridge.

What do you guys think? I'm just looking for some more ideas before I make any changes since I'm away from the pc for a few days.

If you need more info let me know.
Cheers.

 

If it happens when overclocked, it means your system isn't stable. Clock back or check cooling.