The memory kind of surprised me a little bit. I wasn't expecting these 1600 MHz 4 Gb sticks to go over 1800 MHz, much less almost reach 2000 MHz! Keeping the memory at its rated 9-9-9-24 timings but upping the VDIMM from 1.5v to 1.65v we topped out at 1968 MHz. Pretty impressive for 4 Gb sticks of DDR3-1600 memory and especially considering this is CAS 9 rated memory. This memory also did pretty good at tightening up the timings while at the stock speed. It managed 7-7-7-24 at the rated speed of 1600 MHz.