Test System & Test Results
Testing was done in a spare computer I have in the room. Things were housed in a BitFenix Colossus and the door was on during any testing and reading of the temperatures. The room itself was kept at 25°C for the duration. To test the cards I used EVGA OC tool with a Furmark-like OpenGL 4.0 to test things. The card is controlled with MSI Afterburner for the overclocking and overvolting parts of the testing. When the testing says stock fan profile, it is the one programmed into the BIOS.
The testing is run for thirty minutes and temperature information is gathered from Afterburner for all the test results. In order to attain the idle temperatures, things were allowed to cool down and a reset was done and an additional ten minutes was waited to allow for the best possible results.
Idle: Cards were left at stock with clocks of 608/837/1215 with a voltage of 1.000V.
Load: Cards are overclocked and overvolted to clocks of 775/950/1550 with a voltage of 1.050V.
Both the stock and overclocked temperatures were very pleasing to see. They did just a touch better than the air cooler we last tested. These temperatures of 36 degrees stock and 37 when overclocked are with the fan and pump at full speed, so these are best case scenario at 25°C ambient.
With the stock clocks applied and the testing run for another thirty minutes, the load temperatures are quite good for the size of the unit and the single 120mm radiator. When I applied more voltage and raised the clocks, the CoolIT starts to drop a few spots. Pulling in just behind my water loop and the air cooler was a bit of a surprise, but it all comes down to how far you want to push your GTX 470. For the abuse I sent into these coolers, I like the results the Omni offers.
Sound testing is very similar to the results I got with both the Eco and the Vantage when they would run full speed. Expect around 55 dBA during full operation of the Omni. You can lower the power to the unit if you want, and that will drop the noise level to around 40 dBA, but of course will offer less performance.
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