You'll have to give some more input on what you are really looking for. Currently, your post is not making a whole lotta sense.
Is this PCV 520 the same as PCV-RS520? (That's what I got from Googling this). If so, then it's a Pentium 4 processor (probably socket 478), in which case, you'll have to replace the motherboard if you are to install a new CPU.