![]() Here is Guru3D's power supply recommendation: For example, the fastest clocked card in today's tests is the Palit Sonic Platinum at a blazing 800 MHz, we assume the card gets a slightly higher voltage and when we calculate it we get just over 175 Watts power consumption. Next to that you can clearly see that the faster clocked models have a little higher power consumption. ![]() The 1024MB models have more active ROPs to be fed, their power consumption as such is a little higher. Below a chart of measured Wattages per card. Mind you that the System Wattage is measured from the wall socket and is for the entire PC. ![]() Subjective obtained GPU power consumption = ~ 154 Watts.System Wattage with GPU in FULL Stress = 307W.We'll take one reference card as example: Our normal system power consumption is higher than your average system. On average we are using roughly 50 to 100 Watts more than a standard PC due to higher CPU clock settings, water-cooling, additional cold cathode lights etc. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). Our test system is based on a power hungry Core i7 965 / X58 based. The before and after wattage will tell us roughly how much power a graphics card is consuming under load. We simply stress the GPU, not the processor. The methodology: We have a device constantly monitoring the power draw from the PC. Lets have a look at how much power draw we measure with this graphics card installed. No further configuration is required or needed. ![]() You can now turn on your PC, boot into Windows, install the latest NVIDIA Forceware driver and after a reboot all should be working. Preferably the PEG headers come directly from the power supply and are not converted from the 4-pin Molex peripheral connectors. GeForce GTX 460 SLI needs four 6-pin PEG connectors.GeForce GTX 460 needs two 6-pin PEG connectors.Once the card is installed and seated into the PC we connect the two 6-pin PEG power connectors to the graphics card. Preferably your power supply is compatible, most PSUs after 2008 have these connectors as standard: Installation of any of the GeForce GTX 460 cards is really easy. ![]()
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