New System instability

[Voltage]

Hi,

Ive recently built:-

Q9550
4 gig Corsair
Asus Rampage
ATI 4870x2

all at stock

every few hours when gaming it will just freeze up....my cpu temps are fine (40oC full load) and my mobo temp is stuck at 56oC.

my gfx card is running at 72oC full load at the time of the crash too.

im a bit puzzled as to what it is....im thinking i might have a memory problem.

any ideas?

 

[Voltage]

ok ill give it a try....im thinking if i do have a problem its either with my memory or my gfx.