ASUS GTX550 Ti DirectCU TOP ReviewRHKCommander959 -
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Temperature testing will be accomplished by loading the video card to 100% using MSI Kombuster, which is paired with MSI's Afterburner overclocking utility for temperature monitoring. I will be using the stability test set to a resolution of 1920 x 1200 using 8xAA. I will use a 15 minute time frame to run the test, ensuring that the maximum thermal threshold is reached. The fan speed will be left in the control of the driver package and video card's BIOS for the stock load test, with the fan moved to 100% to see the best possible cooling scenario for the overclocked load test. The idle test will be a 20 minute cool down with the fan speeds left on automatic in the stock speed testing and bumped up to 100% when running the overclocked idle and load testing. For load testing the GTX 580 and GTX 570, I will use Crysis Warhead running at 2560 x 1600 using the Gamer setting with 8xAA looping the Avalanche benchmark scenario, as I have found this to put a load close to that of Kombuster on a video card. This is needed as a way around the current limiting ability of the GTX 500 series when it detects programs that put an unrealistic load on the GPU, which Kombuster does.
- Monitoring with MSI Afterburner
- GPU Stability test in MSI Kombuster
- 15 minute load duration
- 20 minute idle duration
- Temperature measured in degrees Celsius
Lower = Better
The temperatures that were achieved are remarkable! Even though the base of the heat sink is rough, it manages to beat all the other cards. Flatness matters more than smoothness, and the base is flat, thus that is why it was able to achieve such good cooling. With such low temperatures, the card could likely go further if more voltage was allowed, although the silicon likely couldn't handle the strain for long, especially considering that NVIDIA has stated that they've reduced voltage leakage. NVIDIA has lowered idle heat output greatly — even the GTX 580 was able to run at 30 °C on idle, overclocked.