Holy mother of god, that case is HUGE. Seriously, a full-sized ATX board looks same in it as miniITX mobo looks in mine. D:
I guess it's even bigger than your Mac Pro?
But statistically NVidia cards have way less hardware errors.
EVGA failure rates on 500-series GeForce's in 2011: 1.3%
SAPPHIRE failure rates on 6000-series Radeon's in same year: 4.1%
Talk about almost 3 times more failures.