|VisionTek Killer HD5770 Combo Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Steven Iglesias-Hearst|
|Wednesday, 16 February 2011|
Page 16 of 19
VisionTek Killer HD5770 Temperatures
Benchmark tests are always nice, so long as you care about comparing one product to another. But when you're an overclocker, gamer, or merely a PC hardware enthusiast who likes to tweak things on occasion, there's no substitute for good information. Benchmark Reviews has a very popular guide written on Overclocking Video Cards, which gives detailed instruction on how to tweak a graphics cards for better performance. Of course, not every video card has overclocking head room. Some products run so hot that they can't suffer any higher temperatures than they already do. This is why we measure the operating temperature of the video card products we test.
To begin my testing, I use GPU-Z to measure the temperature at idle as reported by the GPU. Next I use FurMark's "Torture Test" to generate maximum thermal load and record GPU temperatures at high-power 3D mode. The ambient room temperature remained at a stable 26.6°C throughout testing. FurMark does two things extremely well: drive the thermal output of any graphics processor higher than applications of video games realistically could, and it does so with consistency every time. Furmark works great for testing the stability of a GPU as the temperature rises to the highest possible output. The temperatures discussed below are absolute maximum values, and not representative of real-world performance.
Although my ambient temperature is a little high for this time of year the Killer HD5770 still sits 15.4°C above, the cooler is effective but not as effective as the reference design's cooler. A heavy load from FurMark raises the temperature to 80°C and also raises the fans speed from 40% to 63%, putting the fan on manual and cranking it up to 100% saw the temperature drop to 77°C but the noise level at max speed is in the realms of annoying. I think I would rather have an extra 3°C and have a semi quiet fan.
While we are talking temperatures I thought it best to point out that the VisionTek Killer HD5770 has four different temperature readings in GPU-Z. AMD Overdrive reports back GPU Temp. #1 (which is somewhat lower) thereby making you think your GPU is cooler than it is. FurMark reports between back a result somewhere between GPU Temp. #2 and GPU Temp. #3. In the above tests I had GPU-Z make a log of the results, temperatures used for results were taken from the GPU temperature reading (third from top).