OCZ DDR2 PC2-5400 Gold GX XTC 1 GB @ Overclockers Online

Snip: As for my experience and recommendation, I have to say this is fine RAM for someone doing some overclocking. Why? Well, out of the package you’re guaranteed a nice frequency to work your frontside bus up to as you keep the memory frequency at a 1:1 with your processor and the latency as low as you can without the system becoming unreliable.

Full review @ Overclockers Online