|XFX Radeon HD5770 Video Card HD-577A-ZN|
|Reviews - Featured Reviews: Video Cards|
|Written by Bruce Normann|
|Tuesday, 27 October 2009|
Page 17 of 19
VGA Power Consumption
Life is not as affordable as it used to be, and items such as gasoline, natural gas, and electricity all top the list of resources which have exploded in price over the past few years. Add to this the limit of non-renewable resources compared to current demands, and you can see that the prices are only going to get worse. Planet Earth is needs our help, and needs it badly. With forests becoming barren of vegetation and snow capped poles quickly turning brown, the technology industry has a new attitude towards suddenly becoming "green". I'll spare you the powerful marketing hype that I get from various manufacturers every day, and get right to the point: your computer hasn't been doing much to help save energy... at least up until now.
To measure isolated video card power consumption, Benchmark Reviews uses the Kill-A-Watt EZ (model P4460) power meter made by P3 International. A baseline test is taken without a video card installed inside our computer system, which is allowed to boot into Windows and rest idle at the login screen before power consumption is recorded. Once the baseline reading has been taken, the graphics card is installed and the system is again booted into Windows and left idle at the login screen. Our final loaded power consumption reading is taken with the video card running a stress test using FurMark. Below is a chart with the isolated video card power consumption (not system total) displayed in Watts for each specified test product:
* Results are accurate to within +/- 5W.
The XFX Radeon HD5770 pulled 22 (119-97) watts at idle and 115 (212-97) watts when running full out, using the test method outlined above. These numbers are very close to the factory numbers of 18W at idle and 108W under load, and are the exact same results I got when I tested the reference card from ATI. This is one area where these new 40nm cards excel. If you keep your computer running most of the day and/or night, this card could easily save you 1 kWh per day in electricity.