12-12-2011, 08:16 PM
Of course 1x can run a GPU at 100%. Think about what is actually being transfered to the GPU, data. 1x PCIe @v2.1 (most cards) allows for 500 megabytes per second. Even if you went over with say a 2gig wordlist the data is cached before pushed, so you would never notice a preload time.