There are three different versions of the Athlon XP 2600+. You can identify them by their OPN(Ordering Part Number):
OPN: 'AXDA2600DKV3C' - Model 8, 133MHz(DDR266) FSB, 256KB L2-cache - clocked at 2.13GHz OPN: 'AXDA2600DKV3D' - Model 8, 166MHz(DDR333) FSB, 256KB L2-cache - clocked at 2.08GHz OPN: 'AXDA2600DKV4D' - Model 10, 166MHz(DDR333) FSB, 512KB L2-cache - clocked at 1.92GHz
Due to the different FSB-speeds and L2-cache sizes, these models have different clockspeeds so they will all perform about equal on average.
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