之前亂翻舊文看到的
http://www.anandtech.com/cpuchipset...aspx?i=2330&p=5
關掉sse hl2效能差不多
SSE/SSE2 Impact on Performance
Just for kicks we turned off the Athlon 64's SSE/SSE2 instruction set support to see if that impacted performance in any way:
at_canals_08 at_coast_05
SSE/SSE2 Enabled 116.12 140.43
SSE/SSE2 Disabled 117.64 140.43
Despite minor variations in performance, it doesn't look like SSE/SSE2 is doing much for the Athlon 64 under Half Life 2. We just had to fulfill our curiosities.

不過SSE/SSE2 128位元暫存器可放比x87多筆的資料應該會更快呀?


有一些軟體也有人用/arch:SSE /arch:SSE2重新編譯
firefox
http://pryan.org/firefox/jayfromtaiwan/blog/