Is my RAM configured correctly?

[DEL 707]

I'm deperatly trying to solve a crashing problem, which i've been experiencing on and off since I've built this machine.
All the hardware's passed every test I've thrown at it. I'm grasping at straws but I'm hoping that it's a configuration problem.
While playing some games, the whole system will just freeze, sometimes with some graphics corruption and a really nasty electrical/static sound through the speakers. Normally takes 15-30min, sometimes longer, happens more regually in WoW and FEAR, has never happened in HL2, Prey, X3, sometimes happens in CoH and BF2.

I'm using a NF4 SLI-DR EXPERT (Socket 939) PCI-Express Motherboard with
G.Skill 2GB DDR HZ PC4000 (2x1GB) CAS3 Dual Channel Kit memory, i used CPU-Z and it gave me this info on my memory.

Channels # single
Frequency 157.9Mhz
FSBRAM CPU/14

Is it possible I have my RAM set up incorrectly.

 

[DEL 707]

I've run memtest about 5 times, but I'll give that prime95 a bash.
What sort of settings should I be using for my RAM?

 

[DEL 707]

It's just passed it's prime95 test.
Machine is still crashing though, I just restarted it so I could run in dual core in windows and my bios screen had corrupted graphics
Another restart sorted it, but I wish I could figure out what the problem is.