|Cooler Master Hyper 612 PWM Heatsink|
|Reviews - Featured Reviews: Cooling|
|Written by David Ramsey|
|Wednesday, 27 July 2011|
Page 5 of 6
Testing and Results
For this test, I used the following heat sinks in addition to the Cooler Master Hyper 612 PWM:
For heat sinks without a stock fan, I used a Thermalright TR-FDB-12-1600 fan, which puts out 63.7CFM at 28dBa according to Thermalright. This mid-range fan provides good airflow and reasonable noise levels. For "apples to apples" testing, where each heat sink is tested with the same fan, I used a Delta AFC1212D. This high-performance PWM fan is rated at 113CFM at a claimed 46.5dBa at full speed...which means that while it moves quite a bit of air, it's very loud.
The Intel Core i7-950 I used in this test runs much hotter than the Core i7-920 I've used previously. At 1.35 volts, with a BCLK of 175Mhz, the 4,025Mhz CPU pumps out enough heat to stress the very best heat sinks. AIDA64 would report throttling once any single core reached 100 degrees Celsius; any throttling resulted in canceling the test and recording a "FAIL". This overclocked and overvolted Core i7-950 represents an extreme that many heat sinks cannot handle.
The chart below summarizes the results with the stock fans (hotter temperatures towards the top of the chart, and cooler temperatures towards the bottom). The twin-fan coolers have a real advantage here, since their dual fans generally move more air than the stock single fan of any of the other units. Remember that the lower the thermal difference is, the better the heat sink is performing.
Stock Fan Tests
As you might expect, the heat sinks that come with two fans tend to do better than those with only one fan...which makes the Hyper 612's performance all the more surprising. Connected directly the computer's power supply, the Hyper 612 PWM's fan is audible, but not particularly noisy. I'd say it doesn't sound like a fan that can push over 80CFM, but the results speak for themselves: the Cooler Master Hyper 612 PWM powers past most of the other coolers in this comparison. Nothing beats the Cooler Master's own V6 GT, but its dual fans cranked up to full speed for this test do extract a significant audio penalty, one that's arguably not worth the mere 1.1 degree advantage it has over its sibling.
Delta High Speed Fan Tests
The Delta high-speed fan attaches to the extra fan bracket Cooler Master includes with the Hyper 612 using four standard self-tapping fan screws, the short, stubby kind you'd normally use to mount case fans. The Delta fan is rated to move over 30 CFM more than the Hyper 612's stock fan, but that performance comes at the cost of very high noise levels. Still, beating the Prolimatech Super Mega and getting within a degree or two of all but the much larger and more expensive Thermalright Silver Arrow is an accomplishment Cooler Master can be proud of. The 3.3 degree drop is smaller than I normally see when using the Delta fan, indicating that the stock fan does a pretty good job. I think for most applications it would be better to use the extra fan mounting hardware to add a second, quieter fan to the rear of the cooler.
I'll summarize my opinions on this cooler in the next section.