The one beef I have with this set is that the modules would not budge above the rated 1600MHz threshold on two P55 boards that are on the qualified motherboard list. I updated the BIOS on both boards to the latest publicly available BIOS and still no luck in overclocking the modules. I figured I had seen this before on another P55 board so I swapped the modules to my X58 based MSI Eclipse SLI board (also on the QML) and was able to run the Black Dragon modules all the way up to 1934MHz (967MHz), a significant improvement with the voltage kept at 1.65v and bumping the timings up to 9-9-9-28, a much better result.