Test System & Thermal Results
The testing done on the CPU coolers is done using the system in the chart above. Keeping the room between temperatures of 24.5°C and 25.2°C is done for all coolers tested. There is a slight variance due to the heat of the CPU and its effect on the ambient temperature during the testing phases. To ascertain temperature readings, I use RealTemp 3.60 as it has proven itself to be very good when it comes to Intel thermal readings.
Verifying the speed in the screen shots you will soon see, I used the latest version of CPU-Z, which is version 1.58 at the moment. To load the processor to deliver the abuse to all of the coolers I am currently testing, I selected Intel Burn Test version 2.52 to deliver the most heat out of the processor and memory controller as possible to gain realistic results for the enthusiasts who really like to push their hardware.
There are runs at both stock, which in the case of the GIGABYTE GA-Z68X-UD5-B3 is 3.8GHz with 1.25V to the CPU, and overclocked to 4.513GHz with 1.35V to the CPU. To add a bit more pressure to the situation, for the stock runs the RAM is tuned to 1600MHz with CAS 6 timings, and for the overclocked runs I set 2133MHz at CAS 9 to utilize the memory controller in the CPU.
The single fan testing results with IBT running for almost two hours; you can see we take the amount of usable RAM as far as we can to ensure we are pulling every last drop of heat that the processor can push to the cooler.
This shot shows the two fan testing results. At this time I must mention that the fans had to be run at 12V to even out the air flow between them, so these are the best results I was able to get from the Prime SD1484.
Compared with the other three coolers we have tested in this manner, the idle temperatures with the PWM function active is right where I would expect them to be, so no real surprises to be found here.
At stock the Prime SD1484 comes in with a 60°C result which is pretty good. The 70°C result for the single fan testing wasn't the greatest on the list, but reasonable considering it matches the performance of the Polaris 120. With two fans on the Prime and as much power as I could supply, the temperatures dropped another 2°C; but running your hand around the cooler, you feel more air out the sides than you feel going through the cooler with one fan on it. It just seems slightly wasteful for such a well thought out fin arrangement.
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