(power supply issue) I have a Ikonik vulcan 1200 watt psu that goes from 12.3v @ 30a to 11.5v @ 3a under load.?

try underclocking your chip and pulling out one of the gtx's if not you can damage the chip whitout it getting the right voltage....... if you have onboard graphics pull both v cards and limit your ram to what you need and you can get by for a week or 2 without any issues i would think........ i dont think anyone could answer this as a for sure answer, it will all be opinions