|ATI Radeon HD5670 HDMI Video Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Bruce Normann|
|Thursday, 14 January 2010|
Page 13 of 16
ATI Radeon HD5670 Temperature
It's hard to know exactly when the first video card got overclocked, and by whom. What we do know is that it's hard to imagine a computer enthusiast or gamer today that doesn't overclock their hardware. Of course, not every video card has the head room. Some products run so hot that they can't suffer any higher temperatures than they generate straight from the factory. This is why we measure the operating temperature of the video card products we test.
To begin testing, I use GPU-Z to measure the temperature at idle as reported by the GPU. Next I use FurMark 1.7.0 to generate maximum thermal load and record GPU temperatures at high-power 3D mode. The ambient room temperature remained stable at 23C throughout testing. The ATI Radeon HD5670 video card recorded 38C in idle 2D mode, and increased to 60C after 20 minutes of stability testing in full 3D mode, at 1920x1200 resolution and the maximum MSAA setting of 8X. The fan was left on its stock settings for this test.
60°C is an excellent result for temperature stress testing, especially with stock fan settings. The fan has no controller that I could see, and the motor runs on two wires, so there was no tachometer output available. For such a simple, low cost card, it does the job without any excess complications. People are going to see versions of the HD5670 come out with dual-slot coolers, and wonder if the single-slot reference cooler is up to the job. The answer is, undoubtedly yes.
FurMark is an OpenGL benchmark that heavily stresses and overheats the graphics card with fur rendering. The benchmark offers several options allowing the user to tweak the rendering: fullscreen / windowed mode, MSAA selection, window size, duration. The benchmark also includes a GPU Burner mode (stability test). FurMark requires an OpenGL 2.0 compliant graphics card with lot of GPU power! As an oZone3D.net partner, Benchmark Reviews offers a free download of FurMark to our visitors.
FurMark does do two things extremely well: drive the thermal output of any graphics processor higher than any other application or video game, and it does so with consistency every time. While FurMark is not a true benchmark tool for comparing different video cards, it still works well to compare one product against itself using different drivers or clock speeds, or testing the stability of a GPU, as it raises the temperatures higher than any program. But in the end, it's a rather limited tool.
In our next section, we discuss electrical power consumption and learn how well (or poorly) each video card will impact your utility bill...