So here's my power supply recommendation: We'll show you that in a graph in a minute. The IDLE wattage is very okay, the card is clocking down massively, resulting in an all time low power consumption (for our test PC). The monitoring device is reporting a maximum system wattage peak at roughly 285 Watts in CrossfireX (2-way), and for a PC with this setup, this is simply low and certainly remains within acceptable levels. System with GPU in FULL Stress = 222 Watts.Our normal system power consumption is much higher than your average system. I'd say on average we are using roughly 50 to 100 Watts more than a standard PC due to these settings and then add the CPU overclock, water-cooling, additional cold cathode lights etc. Our motherboard also allows adding power phases for stability, which we enabled as well. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). Our test system is a power hungry Core i7 965 / X58 based and overclocked to 3.75 GHz. Bear in mind that you are not looking at the power consumption of the graphics card, but the consumption of the entire PC. After we have run all our tests and benchmarks we look at the recorded maximum peak and that's the bulls-eye you need to observe as the power peak is extremely important. The methodology is simple: We have a device constantly monitoring the power draw from the PC. Looking at it from a performance versus wattage point of view, the power consumption is good for a product of this caliber, according to ATI the 5670 has a TDP of 61 Watts. We'll now show you some tests we have done on overall power consumption of the PC. Boot into windows, install the driver and restart. If you setup two cards in CrossfireX mode, simply pop in the additional card(s) in the closest x16 PCIe slot, the 5670 do not come with a Crossfire(X) connecter, all is managed over the PCIe slot. No further configuration is required or needed. You can now turn on your PC, boot into Windows, install the latest ATI Catalyst driver and after a reboot all should be working. There's no 6-pin power connectors to connect to. Once the card is installed and seated into the PC, that's it. Installation of the product really is easy.
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