"In 2008, Thermaltake released the V1 CPU Cooler which had great features and aesthetics which made it an interesting cooler. Now, Thermaltake has released a revised cooler and named it the V1 AX. The main difference between these coolers is the material. The V1 AX is made of aluminum fins and a copper base while the V1 is made entirely of copper."

Thermaltake V1 AX CPU Cooler Review @ Tweaknews