引用:
Originally posted by petitdragon
謝謝Reich兄的指教. 您所謂的P4全系列應是指FSB 533及800版的吧, 但無論是那一版本姑且不論其記憶體頻寬都優於AMD AthlonXP系列, 更重要的是兩者都支援SSE2. 大家應該都注意到AthlonXP只支援到SSE (即使它有3DNow!, 但Prime95仍採用較快的SSE).
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謝謝petitdragon大的回應，不過連FSB 400的P4也能打敗FSB400的Athlon XP喔？！
以下是天昏地暗大的測試：
AMD Athlon(tm) XP
CPU speed: 2104.68 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE
L1 cache size: 64 KB
L2 cache size: 256 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 32
L2 TLBS: 256
Prime95 version 23.7, RdtscTiming=1
Best time for 384K FFT length: 27.001 ms.
Best time for 448K FFT length: 30.911 ms.
Best time for 512K FFT length: 33.238 ms.
Best time for 640K FFT length: 44.717 ms.
Best time for 768K FFT length: 53.248 ms.
Best time for 896K FFT length: 64.365 ms.
Best time for 1024K FFT length: 71.097 ms.
Best time for 1280K FFT length: 93.003 ms.
Best time for 1536K FFT length: 112.272 ms.
Best time for 1792K FFT length: 137.010 ms.
Best time for 2048K FFT length: 157.624 ms.
以下是blackmeat兄的測試：
Intel(R) Pentium(R) 4 CPU 1.80GHz
CPU speed: 1817.91 MHz
CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE, SSE2
L1 cache size: 8 KB
L2 cache size: 512 KB
L1 cache line size: 64 bytes
L2 cache line size: 128 bytes
TLBS: 64
Prime95 version 23.7, RdtscTiming=1
Best time for 384K FFT length: 22.903 ms.
Best time for 448K FFT length: 27.195 ms.
Best time for 512K FFT length: 30.901 ms.
Best time for 640K FFT length: 37.076 ms.
Best time for 768K FFT length: 45.439 ms.
Best time for 896K FFT length: 54.980 ms.
Best time for 1024K FFT length: 59.383 ms.
Best time for 1280K FFT length: 80.692 ms.
Best time for 1536K FFT length: 108.931 ms.
Best time for 1792K FFT length: 133.692 ms.
Best time for 2048K FFT length: 146.539 ms.
這樣誇張的差距，弟覺得應該不止SSE2這一點有影響？但不是很了解就是了，希望您能抽空解答，謝謝。
