Amd optimized cpuminer. probably works on Intel? but code had been targeted for amd with caches at least as bit as the old Opterons.

Must be built with CFLAGS="-msse2", tested on 64bit linux. "jh_sse2_opt32.h" has not been edited for 32bit builds and is currently broken.

4Ghz bulldozer is running 107/Khs per core. Total 428/Khs
2.4Ghz Opteron is running 78/Khs per core. Total 312/Khs.
2.8Ghz Semepron 145 is running 112/Khz per core.

Will be working on replacing sse2 with newer avx, should greatly improve the "JH" has sections along with "Groestl". Those two lost the SHA3 partially  based on speed. Skien, BMW, and Blake already run screeming fast.

http://stonefoz.myfastmail.com/cpuminer-quark.zip