GeForce 4 Cooling Project: Frosty's GF4TEC Active Heatsink
After a few weeks of spare time in the work room Frosty's GF4TEC Active Heatsink has been finished, and tested on a live MSI GF4 Ti4600. We'll get to the temperature and overclocking results in just a second, but first lets look at what went into making our custom thermoelectric cooled heatsink.
The FrostyTech GF4TEC Active Heatsink employs a few ideas which have been rolling around in the back of my mind for some time now. After reviewing so many different makes and models of heatsinks for processors there are are a few things that begin to stand out.
The first and foremost is a technique we've devised called Angled Fan Orientation. We first applied Angled Fan Orientation about two years ago to improve the cooling performance of pin-based heatsink we were testing at the time. It can be used on just about any type of heatsink given the right prerequisites are there however. As the name suggests, Angled Fan Orientation (AFO for short) essentially means angling the fan to the heatsink so that the exhaust air hits it in a certain way. I won't go into the specifics in this article, but basically what you will see in the following images is an adaptation of that technique. We did some tests a long time ago of AFO vs. standard impingement fan orientations and the difference could be as much as 6 degrees Celsius.
In any case, the FrostyTech GF4TEC is built from an Alpha P125 heatsink, a thermoelectric cooler (from the venerable Swiftech MC1000), a 38mm thick high-speed 7000RPM Delta fan and a copper base plate. On there own these parts were taking up storage room in the FrostyTech Labs, but together they will be combined to be one hell of a nVidia GeForce 4 Ti4600 GPU active cooler. This heatsink is going to do more than cool off the GeForce 4 GPU, it is going to cool it below ambient temperatures! All this in the name of cooling, we must be crazy :)
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