Introduction & Closer Look
Not all CPU coolers are designed to be big, megalithic towers capable of cooling Chernobyl; some are meant for smaller systems such as the one on test today. The be quiet! Pure Rock Slim itself has a small, but efficient design with an all-aluminium fin layout and black/silver colour scheme. The Pure Rock Slim is the smallest and cheapest cooler in the packed be quiet! CPU cooler range, but that doesn’t necessarily mean anything negative. In fact, the Pure Rock Slim was released to cater for those systems that have limited cooler space and doesn’t need anything ‘over the top’. The Pure Rock Slim comes in at a very reasonable £19.99 which puts it in the sub £20 price point; is the be quiet! Pure Rock Slim the best cooler under £20? Let’s find out…
Here we have the box…small, black and very informative!
Inside the box, we have a pair of clips for holding the fan on the heat sink as well as an AMD supported mounting mechanism. There is also a silence optimised 92mm PWM fan which features 7 blades. The Pure Rock Slim supports the following socket types:
Intel – 1150/1151/1155/1156
AMD – AM2/AM2+/AM3/AM3+/FM1/FM2/FM2+
Looking at the main tower, the Dark Rock Slim features 33 aluminium constructed fins with a small footprint. The cooler itself is 56.2 x 97 x 124.8mm in dimensions so this should easily fit in everything but the most hard-core of small HTPCs. This makes the Dark Rock Slim one of the agilest coolers on the market, but also one of the best value options based on the specifications.
On the base of the cooler, a thin layer of thermal paste has been pre-applied so unlike me, be careful not to get your fingers mucky! The Dark Rock Slim features 3 x 6mm copper heat pipes emanating from the copper base all the way through the fin array to provide an optimal cooling solution; it’s not direct contact, but for a cooler of this size and with a maximum TDP of 120w, it shouldn’t make much, if any difference at all.
To install onto an Intel LGA socketed motherboard, it follows the same click and push principle as the regular Intel stock heatsink does. Simply line the plastic clips up with the mounting holes and push through until you hear a click; the click signifies it’s in place, but make sure you listen out for a click on each mounting clip!
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As you can see from the above results, the be quiet! Pure Rock Slim is on par, Cooler Master Hyper 212 LED in most of the thermal testing, only being beaten at 4.5GHz (1.38v) by a single degree. This is fantastic performance for a small sized cooler, especially given the £10 price difference…which you could save and purchase a tube of high-quality thermal compound to replace the stock paste with.