Computer freezing up pls help

notj0e

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Jan 7, 2015
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Hey guys thanks for coming to view this thread.

Forgive me if its in the wrong section but I thought this was probably the most appropriate.

So basically, I've been trying to fix my sister's boyfriends computer for a couple of weeks now and I just can't put my finger on what's wrong with it.

When he first brought it to me, the computer wouldn't even boot past the bios. And when we tried to reinstall Windows it would constantly freeze.

So I suggested we replace the hard drive and start from there. When we reinstalled a fresh copy of Windows 10 on the PC it froze during the "We're just getting a few things ready" screen and we had to restart it.

It loaded up fine one we restarted it but it would constantly just freeze after about 5 minutes of operation. Thinking it was a bad install of Windows I reinstalled it.

Things were going just fine for about five minutes until the freezing started again so I started looking at the other hardware. We ran memtest86 for three hours and there was no errors.

I removed the gpu and it seemed to fix it. I went downstairs while it was downloading a few updates and when I returned k noticed it had restarted, suggesting it may have froze again.

This time I stayed upstairs with it while it was downloading updates and in the midst of it all these horizontal purple lines appeared on the screen and it refroze and after about 5 minutes restarted.

I'm stuck on what could possibly be wrong with the machine. We got it second hand and since my sister's boyfriend updated the software like the guy he bought it off told him to, we have been having perpetual problems with it ever since.

Could it be something to do with the motherboard? CPU? Could the RAM still be faulty despite memtest not coming up with any errors?

Honestly, I have no idea in which direction I should go at this point so any help would be greatly appreciated.

tl;dr computer freezing and wondering what steps I should take from here

If it's any help the system specs are:
CPU: i5 3470
RAM: 2x2GB sticks (not entirely sure on speeds and latency timings)
GPU (now removed): Gigabyte GT640
Motherboard: Gigabyte H61MA-D3V
PSU: Coolerpower 700W (or something like that)
HDD: Seagate Barracuda 1tb
 
Solution
Yes, just throw it out. 80 Plus rating means nothing about quality, and for all we know it's probably a completely fake lie 80-Plus badge, and I highly doubt it's a 700W unit. Just 'cause it says it is doesn't mean it is. When it burns you'll know it's not. ;)
Indeed I am almost 100% positive it is the problem. It's probably providing an extremely unstable out-of-spec voltage to your components, as well as out-of-spec ripple or fluctuation on that voltage. I'd replace it immediately. Realistically, it's probably a 400W power supply with crap capacitors made by who-knows-what that will blow if you draw more than 400W from it.
 
Yes, just throw it out. 80 Plus rating means nothing about quality, and for all we know it's probably a completely fake lie 80-Plus badge, and I highly doubt it's a 700W unit. Just 'cause it says it is doesn't mean it is. When it burns you'll know it's not. ;)
 
Solution

notj0e

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Jan 7, 2015
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Hahahaha yeah I've never even heard of the brand up until this point. I wish I had a spare power supply laying around but unfortunately I'm away from home at the moment. I'll get him to get a new, more reliable one soon and I'll post the results back here. Thanks for your help!