That'd make it an FSB333 Thoroughbred-B. (The FSB reads as 166.xMHz because that's what it is, but the effective FSB is 333MHz, because the XP's bus is double data rate. Same with P4s-- FSB533 P4s have a physical FSB speed of 133MHz, but they have quad-pumped FSBs.) The 2600+ Barton and 2600+ Thoroughbred-B perform equally well overall (the Barton is clocked lower).
DEC Pentium X2 5200+ w/ HyperCache (Ezra core)
Asus M7NCD-MAX3 (OPTi Vendetta 82C760)
6x Generic 32MB PC2700 RDRAM (50ns SIMMs)
2x nVidia Millennium X1800 Duo (SLI mode)
12x (daisy-chained) Quantum Medalist 180GXP (w/ separate SCSI-1 adapter)
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