For fun I even tried a 16core/32GB Linux, and it's hash rate is only 7.96353365. It's actually worse than my 8core/16GB instance running just over 8 hashespermin. CPU's are maxed out and memory usage is about 30%; it's running and connected to the network. Found 0 blocks in the past 10 hours.
Something seems wrong with the linux miner or there is some crucial config setting missing. Some guy on bitcointalk.org said he was getting 60 HPM on a 16core/32GB instance. That's 6x my rate!
My conf contains just the RPC user and password and addnode=xxx with one of the IP addresses. Any tips?