Here is the XP-120, the XP-90 is the same thing just 90mm instead of 120mm
XP-120
And for maximum cooling you mount a fan on top like this one
Panaflow 120mm Ultra Quiet
Or a 90mm fan if you use the XP-90
The easiest and most basic way to overclock is by increasing your HTT setting in bios. It is set at 200mhz (stock). CPU mhz is calculated by multipling HTT by the CPU multi.
For a 3200+ it is HTT 200 x 10 mult = 2000mhz (stock). So if you increase HTT to 210, you have overclocked the CPU to 2100mhz 210 x 10
When you raise HTT you are also overclock the ram. Ram is calculated as HTT 200 x 2 = 400DDR, so HTT 210 x 2 = 420DDR. Depending on your ram it may or may not overclock well. If you ram is not good O/C ram, you can use a "Memory divider" also know as "Memory Ratios". These settings allow you to run memory at a % of the HTT speed. Memory dividers are usually labeled as a portion of 200mhz, like 166,133,100.
For example if you use HTT 241 with the 166 divider, ramspeed would be calculated 241/200*166=200mhz x 2 = DDR400. This allows you to overclock your CPU even if you don't have good overclocking Ram.
As you increase HTT, at some point your system will become unstable. At this point you must increase your CPU volts. Increasing volts increases heat so watch your temperatures as you increase the volts. Use a program like "Prime95" to test your system stability. Once you think you have your maximum stable overclock, run Prime95 overnight, if it gets errors, back off your overclock and try again. Once it passes Prime95 overnight, then its a stable O/C and you can use the settings without fear of your system becoming unstable.
Have fun
