Sorry long post, but this seems to be a strange issue!
I have the following:
Asus Maximus Formula SE (BIOS 0907)
Q6600 G0
4GB Dominator PC2-8500 (4 x 1GB)
Nvidia 8800 GTX
Enermax Galaxy 1000w PSU
2 x WD Raptor 74GB RAID 0
Hitachi Deskstar 7K1000 1TB
2 x Barracuda 7200.11 Raid 1
Vista Ultimate 64Bit
Dell 2407WFP HC
I have the system overclocked at 400 x 9 (3.6Ghz) and the Vcore voltage set to Auto. Any manual voltage I set caused the boot to fail. On auto the voltage is set to 1.39v
The Ram runs at 1066MHz has a voltage set of 2.17v
I am using BIOS 0907 as it is the later bios do not allow me to overclock using auto.
My Voltages are:
CPU: 1.39v
North Bridge: 1.65v
South Bridge: 1.09v
DIMM: 2.16v
The issue I have is that the PC randomly reboots but mostly I notice it when (in order of likelihood)
1 – Playing games
2 – Web browsing with Firefox and using MWP (never crashes with IE but not used IE with WMP)
2 – Streaming video from the PC
The PC does randomly reboot at other times when I am away from the PC too - maybe a couple of times a week
When the PC reboots the CPU temps seem okay – around 60 max, and the GPU and NB temps are okay although the Northbridge idles at 57/58C which is a bit warm.
I have rebuilt the machine and it reboots exactly as before. I am thinking there is an issue with the Motherboard, Memory, or Graphics Card.
I am thinking of switching to 2 x 2GB sticks of memory as that seems like the easiest fix, after that I would consider changing the mobo probably to the Asus Rampage Formula and finally the gfx card.
Have any of you got any suggestions / theories on this?