The performance of the NZXT Panzerbox was top notch and the cooling of the interior components, despite the tightly cramped quarters, was exceptional. The GPUs only saw a two degree increase under load and the RAM and CPU temperature increases were well within expected numbers during a stress testing session. The most remarkable part was that the system temperatures inside of the case remained only one degree above room temperature at idle and only two degrees above that under load. These results of system temperatures would be expected from a normal mid tower case with the components not cramped together, but the large fans and extra ventilation really help this case to perform well under temperature testing.