Hi all, Maybe one of you guys can help me out here are my specs: (its a new build btw) Asus Sabertooth 990FX R2.0 MB (latest bios) AMD FX-9590 CPU Corsair TX850 PSU XFX R7 250 Core Edition Passive GPU Kingston KHX 1600C9D3K4/8GX 1.65V (4 x 2 GB) RAM Samsung 840 EVO 120GB SSD Intel 40GB SSD Cpu, vrm and nb are all costum watercooled with a XSPC RX480 rad. Temps Idle cpu = 25c to 28c at full load p95 its 52c my vrm idles at around 24c to 28c at p95 its 53c nb stays pretty much at 33c to 35c. So cooling should be good enough. When i turn on the pc it boots (dual boot) to grub menu giving me the choice whether to boot into W7 or ubuntu if i boot into w7 i get to the desktop and then 2 or 3 sec later it reboots after that i can use my pc with no further issues. The same happened with booting into Ubuntu when i enter desktop 2 or 3 sec later it reboots...when i restart then there are no issues. Things i have done so far: Disconnecting my W7 ssd and ONLY use my ubuntu ssd -->failed Reinstalled ubuntu 12.04 lts (no dual boot) -->failed Run Memtest for 7 hours--> no errors Upon booting there are no error leds nor error sounds from the mb speaker. Ive done a CMOS reset-->failed Tried to use D.O.C.P. to use the native timings on my ram ie 1600mhz at 9-9-9-27 @1.65v-->failed. (maybe i should manualy set the timings if yes how?) Some said i should up the vcore but this cpu already has 1.5v and is factory overclocked thats why i bought it to not fiddle with the bios settings. After the second reboot i have no further issues...... Any help is much appreciated thanks in advance.