The 1600MHz dual channel memory kit comes rated with 8-8-8-24 at 1.8V and it was able to run either a command rate of 1T or 2T with no issues at this clock frequency. This is due to the fact that Crucial's 1600MHz memory kits use highly screened Micron ICs that have been found to offer great timings and high clock frequencies. With an Intel Core 2 Duo E6750 processor running at 450MHz Front Side Bus, we were able to reach 1800MHz at 2.20V with 7-7-7-20 1T timings on the 1600MHz Crucial Ballistix DDR3 memory kit...