PC Keeps Switching off on its own

terley · 6 Sep 2015 at 13:51

Is your gpu over clocked? I get this when mines over clocked a bit too much as my PSU can't keep up

Swinners · 6 Sep 2015 at 14:45

dtokez said:
What happens if u leave it in the BIOS for ages, does it ever reboot or is it only in windows it does it?

It crashes even when it's in the bios.

Swinners · 6 Sep 2015 at 14:46

freddie64 said:
Is your RAM set up correctly (latency and volts)?

The RAM is set to auto in the bios.

Swinners · 6 Sep 2015 at 14:47

terley said:
Is your gpu over clocked? I get this when mines over clocked a bit too much as my PSU can't keep up

It's a MSI GTX 750 1gb oc version. But I haven't overclocked it.

Swinners · 6 Sep 2015 at 14:59

Is so unstable right now, I just want to throw the thing out of the window.

5960xNvidiaGamer · 6 Sep 2015 at 15:05

Sounds like a loose wire or connection forcing it to shut down. You sure nothing is getting caught in 1 of the fans? have you tried stripping and building it again.

Swinners · 6 Sep 2015 at 15:49

XfXGamer2014 said:
Sounds like a loose wire or connection forcing it to shut down. You sure nothing is getting caught in 1 of the fans? have you tried stripping and building it again.

Yes sir, I've had this thing in bits, I'm ready to throw the thing away. I just can't diagnose the constant crashes and non posts as well.

5960xNvidiaGamer · 6 Sep 2015 at 16:39

Pc's can be a real pain in the arse, hope you get to the bottom of it mate.

Swinners · 6 Sep 2015 at 17:58

XfXGamer2014 said:
Pc's can be a real pain in the arse, hope you get to the bottom of it mate.

Thx XfXGamer, I need a break from it, a few beers down the pub, and maybe a sledgehammer, I'm sure that will fix it! On a serious note, I'm going to breadboard the system again and start from scratch. I might just have to end up taking it to a PC repair shop.

Swinners · 6 Sep 2015 at 18:08

What's annoying is the thing may boot up into windows 10, last a few minutes and then switch off, boot up again or not, if it does it goes off immediately. If something is shorting it out then what would it be? Could the CPU be causing this? I've replaced the PSU, same issues. Could the HDD be at fault? Faulty RAM? Mobo?

Karateyid · 6 Sep 2015 at 18:27

Have you checked the temps to see if that is causing the reboots?

5960xNvidiaGamer · 6 Sep 2015 at 19:39

Could be the ram, have you tried 1 stick at a time?

CaptainRAVE · 6 Sep 2015 at 21:45

Has happened to me a couple of times since upgrading to windows 10. Can't work out why.

Swinners · 6 Sep 2015 at 23:43

CaptainRAVE said:
Has happened to me a couple of times since upgrading to windows 10. Can't work out why.

I'm not sure it's a windows 10 thing, because this happens when I'm in the bios settings as well.

5960xNvidiaGamer · 6 Sep 2015 at 23:52

I would defo try 1 stick of memory at a time.

Nasher · 7 Sep 2015 at 13:39

PSU would be the first thing I'd check. It could also be bad mains power to the socket (or building)

Swinners · 7 Sep 2015 at 14:00

Here's the latest, I've literally breadboarded this system. I have on my makeshift test bed the Mobo, CPU, HSF, PSU plus 1 stick of DDR4 8gb (2666mhz) hyper X ram. Connected to the mobo is a VGA cable to the onboard graphics, keyboard,mouse and a USB stick with memtest 86 loaded up.
I've run memtest several times, and each time the system has crashed, whilst running the test. I've ran this test for each dimm slot and swapped the ram sticks around. I've not managed to run a complete pass of the test.
Plus what I've also noticed is that certain dimm slots don't recognise the brand of RAM. A1 slot does show (Ram info) the make and serial number, but A2 and B1 and B2 show (Ram info: Unknown MHz) nothing.
As far as the tests go, no errors show up for the RAM before the crashes.
So what can we conclude from these tests, is the RAM ok or faulty?, is there a problem with the motherboard's (again) Dimm slots, or is it something else?
I'm already RMA'ing a PSU, do I include the mobo and RAM as well?
Here's another thing to think about, the bios on the mobo is by AMI, I have a little test speaker connected to the mobo, 1 beep on post according to the interweb means a DRAM refresh failure, can anyone confirm this?

Swinners · 7 Sep 2015 at 14:01

Nasher said:
PSU would be the first thing I'd check. It could also be bad mains power to the socket (or building)

Nasher, I had a new PSU delivered a few days ago. So I think that's ok. Originally I thought it maybe a PSU issue, but nope.