well, this is a question i've been pondering over for quite some time how does the new athlon 64 fx-55 outperform the P4 EE in so many aspects. i mean, the P4 EE has 2 MB L2 cache while the athlon64 has only 1 MB L2 cache. both are 64-bit. the p4 is faster even in fsb speeds (having an 800 mhz fsb compared to the 400 of amd). how?????? is the question. is it the motherboard or what?