
Well various scores I got in 3Dmark2001SE using a £45 XP1700+ TbredB were...
9500PRO @ 350/310:
2.20ghz 400FSB (XP3000+?) 14258
2.08ghz 333FSB (XP2600+) . 12677
1.67ghz 266FSB (XP2000+) . 11209 (9500 'only' @ 303/303)
4200 stock @ 250/444:
1.67ghz 266FSB (XP2000+) 9878
950mhz 200FSB (Duron950) 5321 (KT133 & PC133)

Still I still think it's more useful to be using
3Dmark03 on the higher end cards but be warned that CPU and FSB speeds play little part...
1.67ghz 266FSB (XP2000+) 4010 (9500PRO 350/310)

All TbredB (inc XP1700+) should be capable of 2.1ghz with normal voltages and since they're unlocked it should be easy so long as your mobo, RAM or HSF don't become limiting. Try o/c'ing the gfx card and ideally upgrade your CPU ... but gfx card brings by far the biggest improvement when gaming.