Xigmatek HDT-S1283 & SD964 "heatpipe direct-touch" CPU coolers

Cooling
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HDT-S1283 FAN & INSTALLATION



The fan only draws 1.56W at 12V. A cursory Google search of the model number associated it with a variant of Arctic Cooling's AF12025PWM fan. However Arctic Cooling's fans use fluid dynamic bearings, not rifle bearings.



The included fan isolators are designed with a slit to fit through one of the heatsink's fins, and are barrel-shaped at the ends so they will fit in a long groove running down each side of the heatsink.



The method by which the fan isolators are attached is quite sound — fairly easy to use and stable.



The K8/AM2 mounting clip

For AMD systems, a simple tension clip is provided to attach the heatsink to the stock mounting mechanism. The clip can only be used in one orientation. On most AM2 socket motherboards in a typical ATX case, the fan will end up blowing toward the power supply rather than toward the rear exhaust.


The LGA775 mounting frame.

For use on a LGA775 platform, the dreaded standard Intel push-pin mechanism is implemented via a pair of mounting arms which screw onto the base plate. Normally we don't like to see push-pins on large heatsinks like the Scythe Ninja, but in this case, the heatsink's low weight makes it more acceptable.


Heatsink mounted on our test platform with our reference Nexus fan.

Though the user manual recommends attaching the isolators to the fan first and then slipping the fan on horizontally, we found this method to be very difficult. We recommend placing the isolators on the heatsink first, and pulling them through the holes on the fan using pliers (twirling them around the pliers helps as there is not a lot of room to work with). Note, if you place the fan on first, it overhangs two of the push-pins. It may be difficult to get enough leverage to engage them properly.

Getting the pins to lock on to the motherboard was a bit awkward on the fan side, as push-pins are partially obscured by the fan, but no tools were required. It's definitely easier to mount the heatsink with the motherboard not installed in a case. Once the heatsink was secured, the bowing of the board around the CPU socket made it clear that there's quite a bit of tension applied between the base and the CPU. Inadequate pressure is not likely to be a problem here unless you mount the pins improperly.



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