Benchmark: GPU temperature
Perhaps unsurprisingly, the three sound-proofed chassis also trail the pack in the GPU temperature benchmark. Once again, Corsair's 550D is a reasonable performer with the three default fans; the average temps are some way off the 650D, but they're better than the Silencio 550 and SOLO II.
And, of course, the 550D offers plenty of room for expansion. Just removing the side and top vent covers will aid cooling in extreme GPU-intensive scenarios, and if you are planning on running multiple GPUs, we'd recommend adding another front or side intake.