Computing for P4 speed...

[Nats]

I've had an athlon system for the past two years, and haven't
been in touch w/ systems from intel. I know that computing for
the CPU speed is a product of the FSB & multiplier. What about
in the case of the P4? Is it the actual bus frequency or the
theoretical speed (fsb * data rate). A newbie question for sure.
But any help would be appreciated.

 

[CraigRT]

p4 is the same... p4 1.8 = 18 x 100 = 1800

the p4's FSB is 400 and 533 stock, that is 100 times 4 and 133 times 4.

it's "quad pumped" unlike the athlon's DDR FSB.

QDR = P4
DDR = Athlon

does this help you?

 

[89celica]

Just for your info, you can't go by MHZ to assess a procesors performance. AMD and Intel chips are built different from each other now. The P4 has a VLI (very long instruction) Pipeline that allows it to have a high MHZ number, but the AMD with it's short instruction pipeline can compute more instructions per clock cycle. The AMD also has a strong FPU (ALU) now. Biggest factors are what do you need the chip to do and how much do you want to spend.....

 

[Nats]

Thanx. It answered question. Just weird to think that intel is
always giving the fsb's effective speed. Talk about marketing.

 

[DivideBYZero]

Originally posted by: Nats
Thanx. It answered question. Just weird to think that intel is
always giving the fsb's effective speed. Talk about marketing.

Bear in mind thatyou have asynchronous operation of the FSB to the RAM clock in the case of DDR RAM.

E.G. your mem runs at 266Mhz, your FSB at 533Mhz and your core at 2.66Ghz. This I do not see the point of, as running an FSB faster than the Mem can fill it seems wierd. Anyone want to enlighten me?

 

[dajeepster]

hmm... maybe it's because your FSB doesn't run just the memory... there are applications being run in the processor that don't need the ram to run... those really small annoying programs that you wish would just go away so that you can get a higher fps for those rt games so that you don't get shot in the back when the person was in front of you a second ago....
... but I'm probably completely off the mark on what you were asking....

your performance isn't based on Ram alone... yeah...yeah... that's what I was trying to say

 

[Nats]

Honestly can there be any applications besides benchmarking
utilities that can utilize the bandwidth provided by the p4's bus?