VR-Zone has reviewed the latest phase change cooling unit from Asetek, the VapoChill PE S478 Titanium which is sleek in appearance and performs great. As the processors get hotter and overclockers get more extreme, a product like this will definitely satisfy this group of consumers who are constantly trying to maximize performance out of their current systems. With this VapoChill PE S478 Titanium cooling unit, they were able to overclock a cheap P4 1.8AGhz to over 3.5Ghz which is an impressive 95% improvement in clock speed!