My 2GB of GSkill PC4000 is faulty, so until I get a replacement Im using my old 1GB Patriot PC3200 XBL.
Its got a new lease of life. Its never done more than 250MHz~ before with 4 other CPUs in 3 other motherboards.
But now its happy to do 300MHz! DDR600 rocks
3DMark 2001 score -
http://service.futuremark.com/compare?2k1=896178136345!!!
No GFX card overclock and theres definitely room in the CPU and RAM yet