This model features two knobs on the back, one to adjust the fan speed and another one to adjust the +12V rail to up to 12.4V. It has six +12V rails that can handle up to 38A each, with peak output said to be 50A, capacitors to improve output, and there are a total of 12 PCI Express power connectors.
12x 6pin pcie connectors (via 6 REAL Lines) at 2200UFx6 - 13,200UF at connector end - All the solid caps on MB/VGA has only 300+UF max per cap for 16v rated due to only non-solid caps can go high capacitance.
so 4 x 285 classifieds or 4 x 5870s (soldering on an additional connector per card if you are boosting your input)
or 6x 6 pin pcie connectors + 6x 8pin pcie connectors (via 6 REAL Lines)
2 x 8 pin cpu 2200UFx2 @ connector end
lots of molex and satas.