Yup, in terms of QC and durability, Maxwell was a downgrade from Kepler. Those 780M cards were very durable and held up to some pretty crazy abuse. 980M offered higher clocks and more vRAM, but that's really about it. They were unnecessarily fragile and inconsistent quality. Mine were not worth a darn without hard modding to correct NVIDIA's intentional engineering defects. They were not as crappy as 7970M in terms of being failure prone, but they were closer to that than any other NVIDIA GPU I had owned since the 8800M days.