This is the Thermalright SLK-900A... it is one of the biggest, toughest, and potentially quietest heatsinks in Thermalright's lineup.... what, did I say "quiet?" Well the truth of the matter is that dropping a 38x92x92mm fan on the SLK-900A spinning away at 6000RPM really offers no real challenge. I could put that same high speed Delta fan on the cardboard box the SLK-900A comes in and it would probably keep an AthlonXP at room temperature too! (Warning: cardboard will not keep your AthlonXP from instantly overheating and destroying itself :-)

The SLK-900A ships without a fan, but that flexibility allows you to determine just how loud and annoying the heatsink will be, and since the computer industry is gravitating towards quieter heatsinks we chose a stock 25x80x80mm fan for this review. The Thermalright SLK-900A arrives in a rather inconspicuous small cardboard box with a pile of wire clips that allow it to be paired with the following fan sizes; 92x92x38mm, 92x92x25mm, 80x80x38mm, 80x80x25mm, 75x75x15mm, 70x70x25mm, 70x70x15mm, and 65x65x15mm.

I'd recommend choosing the largest and quietest fan you can, but if you're only looking for overclocking results than shoot for the 92x92x38mm variant, and don't forget the earplugs. Seriously. For this review, we'll be testing the SLK-900A with an 80x80x25mm Zalman PS92252H fan which is better known for its low noise characteristics.