Beowulf Home

Graph Information

Processors tested:

AMD Athlon (64K+64K L1 & 256K L2 full speed cache)
Intel PIII (16K+16K L1 & 256K L2 full speed cache)

Benchmarks of AMD Athlon (900 MHz) for large array sizes: 150 MFlops
Benchmarks of Intel PIII (800 MHz) for large array sizes: 190 MFlops

Benchmarks of 733 MHz and 800 MHz Intel PIII CPUs (using an Intel 815E motherboard) show that there is roughly a 33 MFlops increase in performance associated with a 66 MHz increase in CPU clock speed (for large array sizes), or equivalently 0.5 MFlops/MHz. We assume that this holds as well for the AMD Athlons (without doing the explicit benchmarks).

speed(MHz)Cost($) MHz/$ MFlops MFlops/$
700 216 3.24 140* 0.648*
750 247 3.04 165* 0.668*
800 281 2.85 190 0.676
850 372 2.28 215* 0.578*

speed(MHz)Cost($)MHz/$MFlopsMFlops/$
700 144 4.86 50* 0.347*
750 164 4.57 75* 0.457*
800 187 4.28 100* 0.535*
850 220 3.86 125* 0.568*
900 279 3.23 150 0.538
950 381 2.49 175* 0.459*
1000 460 2.17 200* 0.435*

*= Extrapolated from measured data using the 0.5 MFlops/MHz "rule".


Beowulf Home