NOTE: This is going to be a very long post... Will attempt to TL;DR at the end. So a few months ago, I had gone along with finally purchasing parts for my first entire computer build. Here's the parts list: Intel Core i5 3570K Corsair Hydro H70 CLC Corsair Vengeance 16GB DDR3 (2x8GB) Asus P8Z77-V LK Motherboard XFX AMD 7970 Black Edition GPU.
Ultra LSP 750w PSU. Before I get into this, I want to add that I checked the temps of everything during the course of all the issues. My CPU temp never went over 50c and GPU never above 70c. (The less important stuff: 2 1TB Hard drives, 1 Asus CD drive) The build went pretty good. I booted up and worked fine.. for about 3 days. After that, it would absolutely refuse to power on. I ended up replacing the PSU (with the same), which didn't help and so I replaced the Motherboard (with the same) and suddenly it worked.. for about 3 days. It froze while I was playing a game. The computer would not respond to anything. I would then flip the switch on the back of the PSU to turn it off. After letting it sit for 10-15 seconds, I would turn the switch back on and hit the power button- Computer turns on, No beeps, no video, but the Fans are all running. I looked up the issue on Google, and came to the conclusion I had some part that had failed and was preventing the machine to boot. So following many peoples recommendations first I reset the BIOS, which did absolutely nothing, I breadboarded the computer, on a box, with the absolutely minimal components. CPU, 1 stick of ram, (testing in all four DIMM slots, including the other stick) Mouse, Keyboard, HDD, Monitor. Turning it on had the same effect, fans would go, but no video or no beeps from the motherboard. Strangely enough, attempting to boot with no RAM would give the beep code for no RAM. Feeling helpless and tired, as I did not have any spare parts to test each individual component, I put the machine back together, but not before checking the CPU and making sure the connection was correct (which I believed to be okay, since it ran for 3 days before the issues arose) I basically ended up rebuilding the entire machine, Reseating the CPU, RAM Mobo (double checking everything) Reseting the BIOS. I left the GPU out of the rebuild since it wasn't necessary.. Once it was put back together, I figured I might as well give it another shot. I powered it on and bam, I got the beep code for saying there was no VGA detected, as I had not plugged in the video card at the time. So surely enough, I throw the video card in and it works. I got to use my computer again. Now.. After a week. Same issue. The Computer Freezes, Audio buzzes/stutters. Headache ensues. So I decide to do what worked last time: I took it apart entirely, breadboarding once again, testing the each of the RAM sticks in each of the DIMM slots, again, and again, felt defeated. I assembled it back together again, this time WITH the video card. No dice, I checked all the cables once more and then I noticed something odd with the USB header. The corner of the header cable that has no slot for pins, almost looked somewhat melted. I feared the worst, and checked the spot it had been plugged into. Fine. No issues at all. But me being the curious person I am, decided to boot it without the USB header plugged in. Beep. Computer powers on. A few more days pass. Computer freezes, audio stutters.. attempting to boot, no video no beeps. I have no idea what made me do this, but I unplugged the CD drive. I did NOT rebuild the machine this time. All I did was unplug the CD drive SATA/Power. It works again.. for a few days. Freeze. Audio Stutters. I totally unplug it from the wall, redo all of the PSU connections and even plug in the odd USB header and the CD drive, try it and it works. Here's where it works for about 2 weeks, and then the issue comes back to haunt me. Playing game: Computer then freezes and the audio begins it buzzing/stuttering. I just kind of stare at it for a minute, in disbelief, power it off. Unplug it from the wall. And just think for a solid 5 minutes. I plug it back in, flip the switch, and it works. This exact setup (where I unplug it from the wall after the issue and wait to fix it) has happened AT LEAST 5 times now and doing that has always fixed it, for the time being. Until a few days ago. It froze, so I did the usual, I let it run for about a minute, then powered it off, waited 5 minutes, plugged it back in, and tried to power it on. No dice. No video, no beeps. I take the lazy route this time, My motherboard has a MemOK! button on it, that supposedly allows the computer to boot if there's been some issues with it, or at least, that's my understanding of it. So I power on the computer, hit the MemOK! button the motherboard, and it turns off, then back on.. then off.. and it boots. I've done this the last 3-4 times, because just unplugging it and waiting was no longer working. I fear the worst. The stability of my computer seems to decrease every day and I can't identify the cause of the issue. Does anyone have any ideas whatsoever? TL;DR Built computer, worked good for 3 days, then no powering on, replaced Mobo and PSU, works again, now freezes with audio buzzing, fix by reassembling entire computer. Freezes again. Unplug random Mobo header: Works. Freezes, Unplug CD drive, Works, Freezes, plug Mobo header and CD drive in, Works. Freezes, Unplugs from wall, waits a few minutes, works. (x5) Freezes, Fix by using the MemOK! button on my motherboard.