You don't think there's a problem with my CPU then? This is the first time i've run my memory at its specified speed of 1600mhz in XMP mode so that could of easily caused the blue screen...
"little odd with the dust and old BIOS though."
It's fine dust on the back of the motherboard, I noticed it when I was fitting the backplate... the rest of the motherboard is spotless and even had the protective plastic on the chipset heat sinks.
"update the BIOS"
I'm probably going to update it tomorrow because it's getting late.