set the Dram voltage and loosen the timings to 5-5-5-15 or so and mem speed to 800, up the MCh to 1.24-1.28, save and exit then try both sticks. Also manually set the Pl(Static tRead) to 9 for now as it may get set on 6 or something which could be your issue. Then try to swap sticks position if it doesnt work

Also some had issues till they disabled Legacy USB support