1600 H/s:

4x Opteron 6344 (48 physical cores @ 2.6ghz static)
64G ram (12x4GB ddr3-
14.04, built from wolf's git source

inside KVM with cpu-passthrough (couldn't get it to run on 12.04 which is host's bare metal OS, could potentially be faster)
sysctl -w vm.nr_hugepages=144

pool reporting > 2kh, miner at 1600-1650kh/s.

http://i.imgur.com/qdQkiBi.png

Could probably get better performance by a) running it on baremetal, b) using numactl and a better task scheduler.