The only issue I have with this ram is they are limited to certain dividers, at least on my Motherboard. I have the pc9200's and they will not post at 1150 5:6 divider. Using the 4:5 divider they do fine for me. 1200mhz stable 8+ hours blend. 1182mhz 10hrs blend and IBT stable pl8 turbo. But I run a 489fsb and need 1222mhz at a 4:5 and that is not possible with this kit. So my OC is limited by the divider I have to use.