Specs:
EVGA GTX 750Ti FTW (has 6 pin power connector)
Intel G3220 on ASRock Fatil1ty Z87 Killer
Conservative overclock: +50 GPU, +500 Memory
And the results (scrypt):
Baseline (plugged straight into x16 slot): 290-299 kh/s
Non-powered x1-x16 in x1 slot: 270-280 kh/s
Powered x1-x16 in x1 slot: 272-282 kh/s
USB powered x1-x16 in x1 slot: 270-277 kh/s
USB powered x1-x16 in x16 slot (gen 1): 266-269 kh/s
USB powered x1-x16 in x16 slot (gen 2): 288-295 kh/s
USB powered x1-x16 in x16 slot (gen 3): 288-297 kh/s
Non-powered x16-x16 riser: 292-297 kh/s
Thanks for this info. I was expecting more from these cards. Did you try any higher overclocking? And how many cards did you try at one time?