<< P4 basically suck at integer, and is great at floating point. That's prolly why you see some say P4 is faster ... some say P4 is slower. And that's why intel's marketing it for the 'internet experience'. >>
That's backwards my friend. The P4's ALU is "double-pumped" or "DDR" or whatever tag word you want to use..anywyas the Arithmetic and Logic Unit runs at twice the speed of the rest of CPU. It's integer performance should kick some a$$...(RC5 cracker supreme?)
The FPU has been kicked up to 20 stages from 10 or 12 (in Athlon and P3 can't remember off hand which is which though), that means each clock cycle does less work...they have to up the speed quite a bit to get any decent FPU performance.
That's why you see P3/K7 1Ghz slamming the P4 around in FPU...
iSSE2 looks promising when stuff gets fully optimized for it, but x87 FPU power seems to be a weak line in P4...
Anyhow this is all theory...theory means crap.
I could tell you oh wow my athlon has 3 integer pipes compared to your P3's 2, I also have a fully pipelined separate FMUL unit, where as the P3's FMUL uses some of the FADD circuitry. I have 128k L1 cache compared to your p3's 32k. Makes the Athlon look pretty impressive no? When it comes right down to it, the chips perform very similarily, and I bought my athlon based on price and performance/dollar. I don't give a crap about the theory.
Wait and see how the beast performs. It may be quite a powerhouse, it may quite suck (either way I doubt it will be a good value for the power it offers...but we'll see..)