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Cooler Master V6GT CPU Cooler E-mail
Reviews - Featured Reviews: Cooling
Written by David Ramsey   
Wednesday, 07 July 2010
Table of Contents: Page Index
Cooler Master V6GT CPU Cooler
Closer Look: Cooler Master V6GT
V6GT Heatsink Details
Heatsink Test Methodology
Testing and Results
CPU Cooler Final Thoughts
Cooler Master V6GT Conclusion

Testing and Results

I used the following heat sinks in this comparison: Prolimatech Megahalems, Scythe Mugen 2, Thermalright Venemous X, Titan Fenrir, Xigmatek Thor's Hammer, and of course the Cooler Master RR-V6GT-22PK-R1. Of the comparison coolers, the Megahalems, Venemous X, and Thor's Hammer did not come with a fan, and the Scythe SY1225SL 12LM-P 'Slip-Stream' fan, rated at 68CFM, was used for the "stock fan" testing. For these tests, I overvolted the Intel Core i7-920 processor to 1.375 volts, but left all other settings, including the clock speed, as stock. The charts below report the thermal difference (processor temperature vs. ambient temperature) as well as the difference in degrees Celcius from the Cooler Master V6GT, in order of performance, with the best results listed first (lower is better):

Stock Fan Tests

Heat Sink

Thermal Difference
(degrees Celcius)
from V6GT
Cooler Master V6GT 42.4 +0.0
Prolimatech Megahalems 43.6 +1.2
Thermalright Venomous X 43.9 +1.5
Scythe Mugen 2 45.7 +3.3
Xigmatek Thor's Hammer 48.3 +5.9
Titan Fenrir 48.4 +6.0

The Cooler Master V6GT (with its fans on high) places first in this test, with the Prolimatech Megahalems, Thermalright Venemous X, and Scythe Mugen 2 clustered a few degrees higher. (It's interesting to note in this test that the Megahalems, despite depending on a single fan providing less than half the airflow of the V6GT's two fans, is only at a 1.2 degree disadvantage.) There's a larger 6-degree jump to the Xigmatek Thor's Hammer and the Titan Fenrir. The V6GT has a real advantage in the stock fans test since it's the only cooler here with two fans. If the Cooler Master specs for these fans are accurate, we're looking at the results of about 180CFM through the heat sink— remember that although these are PWM fans, for this test they're connected directly to the power supply, and so run at full speed. The noise produced by the V6GT fans at full speed is quite loud, but lower pitched and less annoying than the higher, "buzzy" noise of the Yate Loon fan used in the next test.

Yate Loon High Speed Fan Tests

Heat Sink

Thermal Difference
(degrees Celcius)
from V6GT
Prolimatech Megahalems 39.5 -4.9
Thermalright Venemous X 39.9 -4.5
Scythe Mugen 2 41.2 -3.2
Xigmatek Thor's Hammer 43.9 -0.5
Cooler Master V6GT 44.4 +0.0
Titan Fenrir 45.6 +1.2

This test is the one that levels the playing field: by testing all coolers with the same fan, we can get a better idea of the relative performance of the coolers given the same airflow. The Prolimatech Megahalems proves again that it's one of the best air coolers you can buy, and the Cooler Master V6GT RR-V6GT-22PK-R1 drops from first place to second from the bottom, almost 5 degrees behind the Megahalems. There's just no substitute for a great mounting system and lots of metal...unless it's moving more air through the cooler. The V6GT's two fans are rated for an aggregate 180 cubic feet per minute of airflow, while the Yate Loon D12SH-12 fan is rated at 88CFM, which means that we've removed over half the airflow through the heat sink with this fan replacement. While upgrading the fans on a third party heatsink is the first thing many enthusiasts do, the fans provided with the V6GT provide top-tier performance.


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