“Today’s processor tested is on fact the new Athlon 64 4000+ (K8 ClawHammer) 90nm processor, it was released roughly three months ago and still is a rather difficult to find/buy product. Not only availability is an issue, also it’s price as at this very moment you still need to chip in 500-600 euros for this CPU. Undoubtedly you are already aware that the new 4000+ has been released for Socket 939 platforms only. Funnily enough when you look at the Athlon 64 3800+ and compare it with the 4000+ you’ll immediately notice that both processors run at the same frequency… 2400 MHz. Weird but true, why is the 4000+ faster then you might ask. Simple, internal CPU changes, namely the Level 2 cache was increased from 512 to a big 1MB L2 cache giving it an edge.”
Check out the review at Guru 3D.