Ok I managed to use the same Power supply (1000W Be-Quiet 85+) with every system.
But i will have to clear a few specs.
Core i7 920 is using an Intel SSD 320 120GB. Win 7 64bit
Core i7 3770K is also using a OCZ Vertex 4 256GB SSD. Win 8.1 64bit
Core 2 Quad Q9450 is using 2x 76GB Raptors in RAID 0. Win 7 64bit
Rest of the systems are using a single SeaGate 1TB SATA-6 drive with Win 8.1 64bit.
Edit: Also to point out that Core i7 3770K is using a Corsair H80i and FX8350 is using WaterCooling as well.
I have used a Kill A Watt to measure the Maximum Power usage of each system. This is the maximum Power i show in the device, it is not the average or the power usage each system used for the entire benchmark run.
1080p Maximum Settings at Default clocks.
1080p Maximum Settings - Overclocked.