Random BSOD At Brand New PC?

I bought and assembled a new computer for a friend of mine, tested it, everything seemed fine, until they proved not to be. I've tested all components (proccessor, GPU, RAM, HDD) with all the tests I know for painstakingly long periods, with no errors whatsoever, but neverthelese computer keeps rebooting with BSODs at *random* intervals (independent of use).

is that it *might* be an incompatibility issue between the ram modules and the motherboard. Here I attach the SF tool results and an speccy image of the system.