So I've been to this forum before for help about this problem. Basically I have a few problems with my PC for example my CPU requires a fair bit of voltage (@4.2Ghz @1.250v), and I have to have the offset set too -0.170 and cannot run fixed without crash, to run at an over clocked rate (without over clocking it tries to send a massive amount of voltage to it automatically and I cannot run on a fixed voltage without crashing, at all.) and gets very very hot (can hit 90 on 100% load but never peaks) after re applying heat sink multiple times with the same result. But that's not the issue I have that reasonably under control now. My issue is that when I run my ram at stock clocks (which is 2133mhz), or close clock such as 2200mhz, wether i enter everything manually or use xmb settings it will not post the LEDs will come on the tower and then it will cut out after about 5 seconds. I currently have it running at 2000mhz. This will be repeated 3 times and then it will boot with the setting reset. It defaults the ram too 1600mhz. My specs are: CPU: 3570k Mobo: Asrock z77 extreme 4 Ram: G.Skill ripjaws X series 2133mhz Video Card: Asus r9 280x PSU: Corsair CX750M