I recommend buying memory that has a higher speed than PC3200 (DDR400) if you are overclocking beyond an FSB speed of 200Mhz... this allows you to safely overclock your memory because you aren't really... in fact it is underclocked... if you buy something like PC3700 (DDR462.5).
This allows you to overclock your original FSB speed of 200MHz to 231MHz without going over what is recommended for your memory.
[size=0.5]Full Aluminium ThermalTake Case
AMD Athlon XP 3200+ *400 FSB* Barton (2.2GHz)
ThermalTake Volcano 11+ Xaser Edition Air Cooling
1024MB Corsair TwinX XMS 3200 (Dual Channel 2x512) 2-3-2-6
256Mb XFX 7800 GS EXTREME
2x WD Raptors (10krpm 8MB Cache) 36.7GB using RAID -0
Video Logic SonicXplosion 5.1 Soundcard[/size]