Test system
Hardware
Motherboard	Asus P5WD2 Premium, BIOS 0606
Processor	Intel 660, 3.6GHz (Prescott, 0442)
Memory	Mushkin High Performance PC4200 DDR2
Video card	nVidia GeForce 6600GT
Power supply	OCZ PowerStream 520W
Software
Operating system	Windows XP (SP2)
Drivers	Intel Chipset Driver 7.2.1.100
Monitoring program	Asus AI Booster SysTool
Test program	SuperPi 1.1e

We have chosen to run these tests on a motherboard from Asus, the P5WD2 Premium. This board is known among Intel-overclockers as the best on the market when it comes to overclocking. The two most interesting reasons worth mentioning: The first is that the mainboard is based on the Intel 955X-chipset; this chipset can reach the high FSB-frequencies that we require. The second reason is that Asus finally have started using a 4-phase power regulator, which is a great advantage when using the voltage consuming Prescott CPUs.

We will, as in the previous article, mainly concentrate on how much the CPU can be overclocked using different types of cooling-devices. To test the stability of the CPU we will be using the software SuperPi and even if the CPU doesn’t have to be very stabile to run a 1M calculation, it takes a lot more to run a 32M calculation.

The test will begin by looking into how the most common heatsink performs, Intel’s own.