He said the micro-stutter problems started when he switched to NV. So MS can't have been a problem before that. He could side grade if he wished to reasonably cheaply, he could buy a 2nd hand 7970. At worst he's got another 1GB of VRAM. If he's had MS problems when switching to NV, why would he buy a 780?
Makes no sense.
Ok, the OP has got a 280X and done job. No point carrying this on.