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Review: Corsair Hydro Series HG10

by Ryan Martin on 18 November 2014, 14:08

Tags: Corsair

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Benchmarks II

Here's the biggie. Core temperature exhibits significant improvement with the HG10 and H75 compared to the reference cooler. However, Raijintek’s Morpheus offers quieter operation and lower temperatures than Corsair's watercooling alternative.

We also look at what happens to the VRM temperatures. VRM #1, the primary line of VRMs closest to the fan, saw a dramatic increase in temperatures, rising to a roasting 119 degrees Celsius under overclocked load. VRM #2, closest to the rear I/O, improved on the reference design by a reasonable margin.

The reason why VRM #1 gets so hot is because the reused stock fan receives its RPM signals from the GPU core temperature. That GPU core temperature is kept very low from the watercooling meaning the stock fan maintains a low RPM even when the VRM is rising in temperature. The result is that the VRM gets more use because thermal throttling is eliminated resulting in more power draw, but the same VRM simultaneously receives less cooling because of the RPM signals being sent to the stock fan.

So, in summary, it's a case of VRM usage peaking under load but insufficient cooling due to low GPU temperatures. These two scenarios combine to increase temperatures to super-high levels.