[RC5] Why does Pentium 3 process faster than Pentium 4?
andy at edespot.com
Wed Dec 11 00:26:24 EST 2002
+++ Jim Reisert AD1C [dnet] [Tue, Dec 10, 2002 at 08:51:03PM -0500]:
> I have three machines running the RC5-72 client. They are idle during the
> day, so 99% of computes go to the project (no screen savers or any
> background tasks running). Here are the keyrates for the three
> machines. The rate of the P4 is the same as the rate of the faster P3, but
> is running at 1.7 GHz instead of 0.9 GHz. What gives?
Well, contrary to what Intel would have you believe, clockspeed isn't the
most important factor in determining a chips speed. A lesser clocked
Athlon, or G4 can perform admirably against faster clocked P4's. A lot of
this has to do with the depth of the chips pipe-line, and the number of
instructions executed per clock (IPC).
The P4 is also a slightly different architecture than the PIII. Some
things have changed that effect dnet on it.
There is some good info on CPU's is here:
// Andrew MacKenzie | http://www.edespot.com
// Your system which soared
// So freely on gliding wings
// now hangs, frozen and blue
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