ImMrFilth

@DerBurner @Doomed83 Thanks once again guys! Yea, I truly hope everything will continue to work. It'd be nice to not have to return anything. Here's what the baby looks like, I think it turned out pretty great. Bit of a blurry photo, but whatever. Feels great to finally have a sick set-up to game on. I also still need to turn off the RGB lights coming from the motherboard, but I haven't got that far yet.

@Doomed83 Thought I'd give you an update! It seems like the problem has been fixed. I went to check so that all my cables were plugged in correctly - which they all seemed to do. However, my 24-pin was a little loose. I'm not sure if I made it loose as I was checking or if it already was. But because of this I decided to unplug my PSU completely and then plug it back in whilst making sure every single cable was plugged in correctly. Since then I haven't had any shutdowns. I've had sessions where I've played 6+ hours straight and I also ran a stresstest while I was sleeping which lasted 8 hours before I turned it off manually. I still dont don't trust the PC completely. But for now I'm going to assume that the problem has been solved. Thanks a lot for your help and to all of the others as well!

Alright, that's fair enough! Thanks once again! I'll update once I've tested a different psu!

@Doomed83 Yea dude, I have a few friends, all with pretty decent PC's so I'll get it done one way or the other! Thanks! One thing I just noticed is that the fan on the psu doesn't even spin. I'm currently running a stresstest and it's been going for 35 minutes. I read about the rm750x in a different forum and they said the fan only activates at 40% watt usage. But surely, with my system, during a stresstest, it'll be above 40% load, right?

@Doomed83 Yeah! My friends going to lend me his so that I can check if it's a faulty PSU! Hopefully we'll get it done this weekend. Oh! No, it's standing on my desk, so that's all good!

@DerBurner Yea, honestly only thing I can think of would be that it's a faulty PSU as well. Maybe a slight chance that it could be the motherboard? Unfortunately I can't use my old PSU to test because it doesn't have enough 6+2 pins / 8 pins to power the 1080ti. @Doomed83 I'm not 100%. The PSU fan is aimed towards the bottom of the case where there's a hole and a dust-filter if that's what you mean!

*bump*

Okay, problem just came back. Rip. After the 2 hour stresstest. 2 hours of playing Fortnite and ~an hour of watching a stream, it gave up. Shut down during the stream. Wasn't doing anything special. Didn't even have the game running in the background. Computer shut down, then turned back on within 5 seconds automatically and then shut down again. I just switched the power off, on the PSU for now. Honestly, it feels so much like the PC is overheating. Like the way the shut downs expresses themselves make it seem that way. But I don't know. Why would it happen so randomly? Especially when my temps are completely fine and as I was basically idle'ing. Edit: I did not buy the motherboard second hand. It's completely new, bought from a retailer.

@For Science! Okay, so.. It seems fine? I chose to run the test for 8 hours and stopped it at the 120 minute mark. No problems at all. I'm surprised. Am I alright? Here's a printscreen at the 2 hour mark.

I was using Aida64 before, but I'll download RealBench instead! I'll get back to you once I've let it run for at least 2 hours then. Unless I crashed before that mark.

@Doomed83 Oh! Okay! I'll make sure I do that then! @For Science! I reset the cmos and have now started a stresstest. How long should I let it run before I know if it was a success or not?

@Doomed83 so since the 1080ti at full load can pull more than the rail supports. Does that mean I can't use this PSU? Sorry if I'm asking stupid questions, I'm just very new to all this.

I saw your edit now. Different rails, what does that mean more specifically?

@For Science! Alright! I'll try doing that as my first move then! I also forgot to mention that I ran a stresstest earlier today after changing some settings around. The PC managed to run for an hour and 10 minutes. I actually turned the test off manually after that because I thought that the problem was fixed. The PC then turned off a few minutes later instead while I was waiting for the GPU and CPU to cool off. I increased the fan speeds on my radiator and the exhaust while doing this. Not sure if that has anything to do with why it crashed, but thought I'd include it. @Doomed83 I'll try running the build of my old PSU then! I'll try For science's solution first though!

@For Science! Yea, this is something I've heard from other threads of people having similar problems. Do you reckon this is a good starting point though, or are there other options I can try first? I'm a bit scared to touch anything on the motherboard as I'm new to all of this. @Doomed83 This is the solution my friend told me to try. I have an old power supply from the computer I'm upgrading from. But it's pretty much ancient. It's the "FSP-GROUP" FSP750-80APG. It's 750 watt, but I'm not sure if it'll work with my 1080ti? And no, no intentional overclocking has been done!