The proper heat sinks showed up and I strapped a couple of those micro fans from the stock AMD CPU heat sinks on them. Running 24 NFS tasks now and getting 55 - 59C readings on CPU 0 cores and 61 - 65C readings on CPU 1, I assume a 6C difference in the 2 CPUs is normal enough, temps seem quite good overall.
Do you typically run one task per thread? Or do you leave a thread or two free for overhead? Looking in TOP my load average is 25.06 where 24 would be 100%.