I've got a mother board here that needs a new processor, the socket says mPGA 478B on it, but I was wondering what/if there is a difference between a socket 478B and socket 478 processor. Also will a regular 478 work in a 478B socket?

Better late than never?

Socket 478 (mPGA478B) and many other chipset/processor questions answered here:

Socket 478 (mPGA478B) (http://tinyurl.com/5mu2bw)

Must of them will with a little work I have some 2.4 2.6 2.2 2.0 if you like ill send you one to try

Teo emanuel