New HDT cooler from Xigmatek :

HDT-D1284



Source : http://www.xbitlabs.com/articles/coolers/d...hdtd1284_3.html

It is interesting that when XIGMATEK HDT-D1284 is installed with its heatpipes facing particularly this way as in the picture above, it didn't transfer the heat from the CPU as efficiently as we had expected reporting the exact same monitoring graph every single time and reporting an error after a minute into the test:

We did check the contact between the cooler base and the CPU heat-spreader multiple times using our thermal compound imprint method:

However, it proved that the problem lies specifically with the heatpipes positioning, because once we moved the cooler with its heatpipes facing upwards, the thermals got back to normal and all tests were a pass without any problems. To tell the truth, this is pretty strange because we haven't seen anything like that during our previous tests of similarly designed cooling solutions. Besides, the heatpipe performance doesn't really depend on its positioning. In case of XIGMATEK HDT-D1284, we have double-checked and confirmed the direct dependence of the cooler efficiency on the heatpipes positioning. Maybe the elbow curve or larger heatpipes diameter (8mm instead of the standard 6mm) or even the heatpipes direct touch technology affects the results... Of course, it would be interesting to see if the same dependency occurs by other samples of the same cooler, but unfortunately, we do not have the chance to check it out yet, because we only have got one sample at hand.