Hey mate!
You just made my day I think...
I have experienced your problem very often within the last few days. I just sent back my Aquaero from Aqua Computer, as I suspected it to be the bad player. But if I am wrong and my Aquaero is all right, I know where to search next.
I myself am using the fallowing system:
Q6600
P5KC 0701
8800 GTS
Enermax Liberty 500W / Amacrox Calmer 460W (the problem occurs with both of them, so I do not think it has to do with the power supply)
2x 1GB MDT PC2-6400U CL 5-5-5-15
Club 3D-Theatron DTS sound card
Do you see any parallels except for the P5KC? My computer is water cooled, yours by air. I am using a Quad Core, you a Single Core. Which graphics driver versions do you have installed? Did your problem consist from beginning on, or did the computer once boot perfectly?
This week I am getting news about my Aquaero, then I know much more about the problem - well not that much more, but I can at least say that it is not due to my Aquaero, which is actually better than nothing...