Their latest addition to the Volcano series is the Extreme Volcano 12. This HSF features support for AMD Athlon XP up to 3400+, an all copper heat sink, and a variety of operation modes. In this review, I will be comparing the Extreme Volcano 12's performance to a stock HSF that AMD ships with Athlon XPs. Considering that it is all copper and much larger than the stock HSF, I expect the Extreme Volcano 12 to outperform the stock HSF by near two digit margins.