Visiontek Radeon 6950 2GB
Temperatures and Power Consumption
To test temperatures, we fire up FurMark and let it run for awhile until the temperatures level out. FurMark pushes GPU thermal loads extremely high, and can be considered a worst-case scenario.
Below are the FurMark "worst case" results:
The temperature results are a bit surprising, with the Visiontek card about 10°C hotter than the reference design at load. However, the tradeoff is that the reference design is extremely loud when the fan ramps up, whereas the Visiontek card is nearly silent by comparison. An interesting note is that the fan profile stays very low speed and then ramps up very quickly as the temperature reaches 90°C; there is no halfway ground really. It’s sort of an all-or-nothing approach, which means the card is very quiet (and hot) until it reaches that threshold. This is a bit unusual, as most cards we see typically have a gradual ramp-up profile. You could edit the BIOS and reflash the card if it’s a big concern, or just manually control the fan speed with a 3rd party utility such as MSI Afterburner.
We create a baseline power draw without a graphics card installed. After a graphics card is installed, we let the system sit idle in Window for 10 minutes and then run FurMark for maximum power draw. The difference gives us the power consumption for the card. The results below are for the graphics card only. As with the temperature testing, we report results for the Nvidia 500 cards with, and without, the limiter engaged.
Here we see the Visiontek 6950 faring well very in relation to the competition, sitting more power frugal than even the GTX 560 Ti. Power consumption seems to scale fairly equally among the Radeon cards in proportion to the graphics horsepower available.