I have the 860watt version of this PSU in my computer, it's "probably the best psu ever" according to anandtech: http://www.anandtech.com/show/5464/seasonic-platinum-series-860w

Since I need to have my computer on to mine I will use the computers power supply to power the bASIC's of course, but I would need really long molex power cables (want to have boards around 1.5meter from computer), any ideas where they sell meter long of those or I need to make them myself?