92.1 (Opteron 2220 SE) to 65.0 (QX6700). The slowest socket F Opteron (2210) pair is 10% faster than the fastest Kentsfield, 71.4 versus 65.0 even though they have less than 68% of the clock.
I call a Kentsfield QX6700 getting beaten by a mere pair of Opteron 2210s as getting trampled. A $1300 CPU getting trounced by 2 2210s, MB and 4x1GB Reg DDR2 PC2-3200 DIMMs costing less than $1200. That FSB rears its ugly head again.