|EVGA GeForce GTX 560 Titanium Video Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Olin Coles|
|Tuesday, 25 January 2011|
Page 16 of 17
VGA Power Consumption
For power consumption tests, Benchmark Reviews utilizes an 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 measurement is taken without any video card installed on 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 before taking the idle reading. 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 (system without video card minus measured total) displayed in Watts for each specified test product:
* Results are accurate to within +/- 5W.
The EVGA GeForce GTX 560 Ti surprised us with chilly idle and lukewarm loaded temperatures (previous section), but the surprises keep coming as we measure power consumption. All reference GeForce GTX 560 Ti video cards will require two 6-pin PCI-E power connections for proper operation. Resting at idle with no GPU load, the EVGA GeForce GTX 560 Ti consumed a mere 17W - identical to the GTX 460 by our measure. Compensating for a small margin of error, this also roughly matches idle power draw from the ATI Radeon HD 5770 and AMD Radeon HD 6850. Compared to the GeForce GTX 470 for which it replaces, the GTX 560 Ti is nearly 176% more efficient at idle.
Once 3D-applications begin to demand power from the GPU, electrical power consumption climbs. Because the GeForce GTX 500-series uses new hardware power monitoring technology not included on previous GeForce models, we've had to work around the power-throttling effects enabled when using FurMark or OCCT. To do so, we merely renamed Furmark.exe to renamed.exe and changed some file names and locations. Measured at full throttle with FurMark's 3D torture load, the GeForce GTX 560 Ti topped out at 199W maximum power draw. NVIDIA's stated max TDP is 170W, measured as maximum power draw in real world applications. Our measurements are absolute maximums, since Furmark is not representative of real-world gaming power draw.