BAD HARDWARE WEEK

See the benchies themself here. BEING still revision B2 Phenom 9900 is performance comparable to Intel QX6800 at 2,66 Ghz. In B3 revision, Phenom 9950 should be comparable to QX at 3,2 Ghz and at the approximately same TDP.
Bad hardware thing at Phenom 9900? At 1,3+V applied, TDP is 140W .
Thus, no chance for anything faster, before, you guess Phenom serie 10 000 in 45nm, the next year.
Bottom message: Never try to use at Intel processors program chunks size of 256KB (or larger). You will get a sudden drop of performance of 100%. That is why new Intel multicore is performed miserable in supercomputing applications.