Could my CPU overclocking be limited by my 20-pin PSU?

[bupkus]

PSU:
TTGI model TT-450SS
+3.3V 0.3A-32A
+5V 1.0A-42A
+12V 1.0A-27A
+3.3V & +5V = 223W
Total Power = 450W

3000+ A64(Venice) @ 2.3 GHz @1.485V(default)
Gigabyte X800 [400/(2x498MHz)]
Windows XP w/ SR-2
Zalman CNPS7000-Cu
Epox 9NPA+Ultra
PNY PC2700 512*2