So I have a couple of EVGA Supernova NEX650G power supplies and even though on paper one of these should be fine running 6 x 750 Ti's (~400W), I concluded that it can't output enough power through it's peripherals/SATA ports so if I start hashing with 6 cards it will restart almost instantly while running only 5 cards works fine - if I don't overclock. The only way I managed to hash with 6 cards (other than using a 850W PSU) is to replace two of the 750 Ti's with a brand that need 6-pin power so a bit of the power is coming from the PSU's VGA rail instead of the peripheral/SATA rail. But the hashrates are about 85% of what they should be and I can't even overclock. My question is, can I convert the PSU's VGA or CPU2 channel into MOLEX/SATA for the USB risers somehow, or what can I do?
http://www.evga.com/products/pdf/120-PG-0650-GR.pdf