|ASUS GeForce GTX-465 Video Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Olin Coles|
|Monday, 21 June 2010|
Page 18 of 21
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 turning "green". I'll spare you the powerful marketing hype that gets sent 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.
For power consumption tests, Benchmark Reviews utilizes the 80-PLUS GOLD certified OCZ Z-Series Gold 850W PSU, model OCZZ850. This power supply unit has been tested to provide over 90% typical efficiency by Chroma System Solutions. 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 test computer system, which is allowed to boot into Windows-7 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 GeForce GTX-465 requires two six-pin PCI-E power connections. Resting at idle, the power draw consumed 36 watts of electricity... 6W less than the GTX-470. Putting this into perspective: the ATI Radeon HD 4770 and NVIDIA GeForce GTX-280 use about the same power, while the NVIDIA GeForce 9800 GTX and ATI Radeon HD 4850 both consume more power at idle. Unfortunately, the GTX-465 uses almost twice the idle power draw of the ATI Radeon HD 5770... and comes close to doubling the HD 5850. As our GeForce GTX 480 review demonstrated, Fermi proves to have a big power appetite when it should be snacking on only a few watts.
Once 3D-applications begin to demand power from the GPU, electrical power consumption really begins to climb. Measured at full 3D 'torture' load, the GeForce GTX 465 consumed 219 watts, compared to 278W for the GTX-470. While the GTX-465 matches power consumption of the old GTX-280 (again), it's much higher than the 157W consumed by the Radeon HD 5850. Although Fermi features a 40nm fabrication process, there's nothing 'Green' about the power demand under load and most DirectX-11 video cards from ATI require less power.