Mark: I've noticed this as well. It doesn't seem to be optimized to use that many threads. CB certainly does! One of my 3970s is hitting high 18k with close to 4.2GHz sustained across all 32 cores. That one has 256GB DDR4-3200MHz CL16 (8x32). Amazing kit for the price. Not long ago 256GB was a lot for a hard drive.