The following configuration is working out of the box for BackTrack 5 R1 :
Hardware :
Motherboard -- Intel X79 Express Chipset motherboard
CPU -- Intel i7-3630K (6 cores with HT)
Display card -- 2 x nVidia GeForce GTX590 display cards (1024 CUDA cores per card)
RAM -- 32GB (4GB x 8)
Solution :
Set the boot option to "nomodeset".
Pyrit Benchmark -- 90,000 PMKs/s (+/- 1,000 PMKs/s)


