ThinkSecret says: "Individuals attending Apple's Worldwide Developer Conference have submitted Xbench benchmark results from Apple's Pentium 4-based Power Mac systems. The benchmarks do not reflect native performance of the 3.6GHz systems, however, but rather provide an indication of how PowerPC-compiled applications will run under Rosetta on Intel-based systems."
Overall, the Intel Mac are scoring between 65 and 70 with Xbench, a far cry from the 200+ scores higher-end G5 systems reach. The CPU test is landing in the high teens compared with scores of 100 to 200 for G5 systems, but that appears to be primarily due to lackluster FPU scores. According to a recent Macworld story, Rosetta does not support AltiVec instructions, which substanties the results. The GCD Loop score for the Intel Mac, part of the CPU test, is a respectable 110, compared to dual-2.5GHz G5 Macs that score about 140.
The Intel Mac performed substantially less well than the dual-2.5GHz G5 at Thread test, scoring an 82 compared to 225. In the Computation Thread test the Intel Mac scored a respectable 110 compared to 155 in the G5, but the G5 blew the doors of the Intel Mac in the Lock Contention test, scoring a 420 to the Intel Mac's 66.
And so on....
