I have 4 sticks of F4-4000C14D-16GTES running pretty much at the default DOCP value witch is cl14 @ 1.55V 4000mhz, the only thing I lowered was the base speed of the DOCP 4000mhz to 3733. Everything runs fine I have used Testmem 5 / Extreme @anta777 and Karhus ram test also I've passed both tests with zero errors and have gamed multiple hours on. My only concern is that during gameplay and stress tests my temperatures are from 57c - 60 c again without any errors and in a decent airflow case. I can't find any information really about temperatures only old threads that say anything above 50c causes Errors. any information would be greatly appreciated thank you I do not want to damage my ram with 60c temperatures.