Conclusion: Not Meant For The High End
On the downside, the automatic fan-speed adjustment through the temperature sensors still needs some work.The processor in our testing system, an Athlon64 3400+, ran at a high temperature when tasks with a high CPU-load were run. Sadly, the Ultracool II did not seem to consider this a reason to increase the fan speed by an appreciable degree. In light of the device's price, which comes in at around $40 (€40), we would have like to see ability to manually adjust certain threshold temperatures and, of course, set a minimum rpm for the fans. After all, it's better to be on the safe side.
Nonetheless, the Ultracool II should work without problems in any system safely below the 3 GHz barrier. On the AMD side of things, that means Athlons below 2 GHz (max. 2800+). Of course, a sensible placement of the sensors is of the highest importance, in any case. And if you don't like the aluminum look, the Ultracool II is also available in a version with black varnish.
