Where did you find that? I'm assuming you mean 533 (as that's what PC4200 isaccording to your motherboard specs the ram modules are 433mhz (pc2-4200)
Where did you find that? I'm assuming you mean 533 (as that's what PC4200 is) but still, Athlon 64 X2s will take any speed up to DDR2-800 http://www.amd.com/us-en/assets/con...s/Athlon_64_Unbuffered_DDR2_DIMM_06_10_08.pdf
Ah. I googled his system as well and HP would only say that it had 1GB of RAM installed.googled the model of his computer and that is the spec of his ram module already in use-
Why not? The interface for all DDR2 is the same and the memory controller is on the CPU which, as I linked before, is more than happy to run DDR2-667 or DDR2-800. Also, 667 is not the size, that would be 1GB (or possibly DDR2, depending on how you interpret size). Any DDR2 stick will fit in the socket.The 667's will not work in your machine like the others had said. I would not put them in. In less you have money for possible new motherboard if you mess this one up by putting in wrong size. Here is the size that you need "1GB DDR2-533 (PC2-4200)"