Well i ordered some crucial ballistic when they were on offer and could never get them to overclock, they would die at anything over stock. I just got a OCZ XTC(memory cooler) and installed today, i now have my ram at 1000MHZ clock 5-5-5-18 timings on the first try at 1.95v which is good considering i had to have it on 1.97v to keep it stable at cas 5 timings without this cooler. I will try and get 1200mhz soon but this was just a quick test, so far im impressed with this cooler and at just 50% speed its cooled my motherboard by 17C!. I seriously recommend buying one of these coolers if you want to overclock your ram as they work well .