The psu is brand new 700w coolermaster , everybody said it would more than enough. Crap.
power wise it is, but molex connectors maybe not. I am honestly not sure.
for example the molex connectors on my RM1000, they use the same wire as the GPU cables do, and they run dual 8pin pci-e so about 300W
i think a lot of it is down to the psu and the cables and their all different. but i wouldn't want to put more then 2 gpu's per molex strand even on a good psu. but that's my feeling and paranoia kicking in. i may be wrong