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Thermalright SLK-800U Heatsink Moving to the bottom of the heatsink we'll do a quick check of the base. As you can see, it's quite shiny but not as nice as the SLK-700 that we reviewed a couple of days ago. But there is no need to lap the sink as I didn't see or feel any nicks or scores on the base.
Installation We'll go through the installation step by step and show you how to mount the sink onto an AMD and a P4 using the included hardware. We'll tackle the AMD side first because it's much more involved. The first thing you need to do is remove the motherboard from the case (oh crap). There are two sets of four screws and one set of brass standoffs included with the sink. You'll need the brass standoffs and the long screws with the springs attached to them. You will also need to use the back plate.
There are two sets of washers with the hardware, one set of metal and one of plastic. I recommend using the plastic ones. Using the brass standoffs and the washers, attach the back plate to the back of the motherboard. Tighten the screws snugly. Once that is done, apply the thermal paste and align the heatsink with the brass standoffs on the motherboard. (One thing I forgot to mention, Thermalright has included four small cushion pads in the box, attach these to the bottom of the heatsink. There are four small dimples that show you where to place them.) Using the long screws with the springs, tighten the heatsink down securely, once again being verrrrry careful.
The P4 installation is much simpler. Of course you can mount the heatsink to a P4 the same way, but why go to all that trouble. You will need the two sets of P4 brackets and the small set of screws. Attach the flat plates to the shroud around the base of the sink using the screws.
Guess what? That's it. Now all you have to do is mount the sink using the P4 mounting clips and you're done. See? Much easier.
Testing Ok, now we that we know how to mount the sucker, it's time to see how it performs. We will test it in both AMD and Intel machines. As a comparison we will use the SLK-700 for AMD and for Intel, we will use the Thermalright AX-478 that we tested several months back. Using a probe attached to the side of the CPU, we will measure the temperatures at idle as well as under load. To put the system under load we are going to run SiSoft Sandra's Burn-In wizard for 25 minutes. And for those of you who wish to know, the ambient room temperature is 20.3 degrees Celsius. As I always do I used the supplied thermal goo on all sinks. Test System AMD
Intel
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