okay basically the other day my computer shut down after about an hour and a half of use. i have had the system coming up on 2 years now. anyway after it shut down it just restarts for 3 seconds it doesnt even get to the bios then it crashes and restarts again. now i have tried everything psu mb etc i even went out and brought all new parts apart from psu and case. so the new mb cpu ram and gfx and it still did this. so i used a flatmates psu which i had tried before ordering new parts which didnt fix the problem and it still didnt fix it. so its not the mb cpu ram psu gfx or hdd's my thoughs were maybe the case wasnt grounded properly. even though it did it randomly one day. so i grabbed my old mb and tried to power it up using my flatmates psu however this still didnt fix it. so it cant be the case. i would list my system specs however i see it pointless seen as how i replaced everything apart from the psu and case. i am running a hx1000watt corsair psu so its not a point of not getting enough power esp when i tested the mb's with nothing plugged into them. and nothing else plugged into the psu.