I built a computer earlier this month and I've been having problems with it ever since. At first it kept shutting down or crashing every 10mins-1hour but I seemed to have sorted that out by configuring my BIOS to tell it what speed RAM I was using and making sure all the connections were in and secure. I also updating everything I could to make sure nothing else happened. New Problem: I had been working well for about 2 weeks with no problems at all but 3-4 days ago it started blacking out, the lights would be still on, fans still running but the monitor would go blank and mouse and keyboard won't work. Also holding down Power button for 5 seconds for an emergency shutdown does not work neither does resetting, I literally have to turn the PSU off at the back which makes me cringe every time. PC Specs: Operating System: Windows 7 Professional 64-bit SP1 CPU: AMD FX-8350 21 °C Vishera 32nm Technology RAM: Corsair 8GB DDR3 1600MHz Vengeance Memory Module CL10 PSU: Corsair CX 750W PSU - 80plus Bronze Certified Motherboard: ASUSTeK COMPUTER INC. M5A99X EVO R2.0 (Socket 942) Graphics: VA2213w-4 (1920x1080@60Hz) 2048MB ATI AMD Radeon HD 7800 Series (ASUStek Computer Inc) Storage: 931GB Hitachi HDS721010CLA332 SATA Disk Device (SATA) 111GB Crucial_ CT120M500SSD1 SATA Disk Device (SSD) 931GB Western Digital WD Ext HDD 1021 USB Device (USB (SATA) Optical Drives: TSSTcorp CDDVDW SH-224DB SATA CdRom Device I've also posted this on another forums and here are my current updates on the problem and what I may have tried. Update: I've updated my BIOS, which I thought I had, my BIOS oddly changed my RAM reading frequency again which could have been a problem. I'll post/update if I crash again. I believe it could be my PSU or SSD but I'm not sure. Update: It just BSOD'd, happened while I was playing Skyrim. Update again: Blacked out like before so it wasn't my BIOS not being updated. So far it does seem to be when I'm playing games but I've never encountered this problem with any of my other builds. Update: 18:56 27/12/2013 I changed my ASUS GPU tweak to respond faster when more resources are being used and to cool down the video card then left it on overnight doing nothing but idling and it didn't crash. I got on it while ago and hadn't done anything major but talk on skype and browse the internet with no problems. I turned on Skyrim and immediately the fan got faster, as it should, and within five minutes; black screen, unresponsive, couldn't turn it off by off switch so had to flick the PSU off. Went to boot up again but it wouldn't do anything. I really need help here guys can someone get back to me. I did just read the "before posting" thread which I'm about to go and try some of the programs there. I posted this here just incase anyone has had the exact same problem as me I might be able to diagnose and fix the problem earlier.