Persistent shutdowns 30 second into the boot of windows

[Eko92]

HI everyone

I recently started getting random shutdowns that I'm having a hard time finding the reason for. I can freely enter bios and change around, although it does not listen to when I do try to change booting device. It will save it in bios but will completely ignore it once I boot. If I'm lucky I can enter windows for a minute or less then it shuts down. I felt on one of the sinks on top of my old gigabyte 1366 x-58-ud3r mobo being very hot. I figured I'd lift it up and replace the compound. According to the bios the MCH it is at 58 degrees which I do not think is all that high. Now I'm having troubles detaching the heating at 9 o'clock which is connected to the one I managed to remove the screws from at 6. But even with the compound changed I very much doubt anything will change. The memory sticks and the mobo are the ones being very hot. As for my gpu, it's an nvidia 960 strix 4b, I assume since it does load me onto the desktop occasionally it shouldn't be it? What worries me is that the fans do not spin, occasionally I would catch them rotating but for most they don't. The gpu is not hot enough for them to work I guess? I completely removed windows to get a fresh start if it would be software related but even so it shuts down quickly once it reaches the login screen. A second later it kickstarta again.

I have no idea what to do from here to find out what is causing this as I do not exactly have spares to test with. All I wish to do now is try get that last attached heatsink to be able to replace the compund. After that I have no idea what to assume or go for.

Specs. Win 10 64
6x2gb ram 1600mhz 1.65v
Nvidia gpu 960strix
650 w psu
Gigabyte 1366 ga-x58-ud3r
I7 1366 quad core

Majority in there is rather old except for the hard drives and gpu. I haven't had any problems for quite some time. So I don't see any reason to what's going on now.

Any help is greatly appreciated!

Cheers

 

[Eko92]

Update: I've reinstalled windows twice on two different ssd's and it still shuts down once I reach the desktop. So I guess it's safe to assume the hard drives are fine. Gpu is obviously fine as its both cool and displays image. My big guess here is the psu but I am yet to find someone with one for me to test with. The mobo heats inks ate

 

[moulderhere]

Have you done any ram tests?

 

[Eko92]

Hey everyone!

I eventually found a second psu to test with. At first I had some issues getting anything to display on screen but then I found some neat trick online. By holding the power button down, with the psu off, for about 30-60 secs and then turning the psu on and booting. It worked at last and i got the display going. Eventually it was up for the test to see if it would shut down on me once i booted windows. Nothing such seemed to be happening so i figured i'd do a system stress and still no shutdowns. So it's safe to say that it seems like my PSU couldn't hang anymore. I first noticed these errors when connecting my big screen tv via hdmi. The computer would sometimes shut down. Didnt react all to much at it at first until it became more frequent. I'm just happy no other components fried with it.

As for the mobo heatsinks being hot. I opened it up for the first time and did a complete change of the compound. Funny enough, the compound was cement hard. I even replaced the rubbery pad on the heatsink connected( figured it's one of those compound pads, and replaced both with a thin layer of arctic silver. Northbridge dropped by 13 degrees C with that change while my cpu remains at around 32 C.

I replaced it with an evga supernova 750 g2, i first bought a cx750m but that thing made such painful squeaky noise, like a hamster.

That's all I can think of about my situation here. Figured I'd write as much as I could in case some other poor bastard finds themselves in same situation

Cheers