CPUMINER-OPT-3.3
I tried the Windows binary. On my E5640. I'm pretty sure it has AES_NI, but the software doesn't like it. Says "rebuild with -march=native"
Then I tried the other two binaries, they won't even start at all, just crashes.
In my E5-2650 doesn't work, Says "rebuild with -march=native".
But in my other rigs (I5-3550 , i7 2600) see an speed increment of 10 to 20 percent

It does work.
I know it's confusing but that message is just a tip, not an error so the miner will continue
to start mining. The message should be ignored for first generation AES enabled CPUs.