PC keeps crashing while playing certain games

Speifically Overwatch. I played GTA 5 for like an hour or so and nothing, but playing Overwatch for say half an hour at most and my PC crashes with absolutely no blue screen and reboots by itself.

I've checked Event Viewer for possible reasons of crash and found nothing to point to it. I've run CPU/GPU Stress tests and the temperatures come up fine(70-80C CPU temp and 75-85 GPU temp on load), even though I've had my computer crash at temperatures even lower.

I use a Corsair 450W PSU sufficient enough for my GTX 550 Ti and i5 650 @3.20 GHz. Here's a result from my GPU Benchmark test.

http://prntscr.com/gmh9j9

Any suggestions and I'll run through them. I've done practically everything I could think of; clean my PC off of dust and everything, reapply thermal paste, check air flow(though I'm thinking of keeping the case open and buying a USB fan to complement it) and I've run memory tests to check for errors and there aren't any.

Any help would be appreciated, thank you so much.
Reply to Aerate
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  1. I don't know whether overwatch is more demanding than gta 5. If yes, it could be an issue with either your card or your psu. Your psu is easiest to test in a repair shop unless you've got a voltage meter:http://www.wikihow.com/Check-a-Power-Supply If your PSU output is fine, then test your card in another computer. See if it has the same issue with the same game.

    Otherwise, check overwatch forums for indication that the game itself may not play well with certain drivers/hardware: https://us.battle.net/forums/en/overwatch/22813880/
    Reply to Sedivy
  2. Borrow a friends PSU and try that.
    If it's not a heat issue reboots is usually a PSU problem.
    Reply to Zerk2012
  3. I'll definitely look into the PSU.

    The issue never occurred before I put in the GPU, except when a while ago my PC crashed in a very similar way on plugging in the Ethernet cable. Could a short be possible for one of my USB ports?

    Yesterday on running some tests there was a crash while at 70C GPU temp, and at another point it crashed while using VLC Media Player, something that's never happened before. It could most definitely be the PSU, but it's a rather new one and has worked perfectly fine in the past before the GPU.
    Reply to Aerate
  4. Gpu are the most power hungry parts of the pc. If you put in a gpu where there wasn't one before, that'll definitely make a huge difference on the psu which then might not be able to keep up anymore where it was perfectly fine before.

    Ethernet cable can be a cause of crash but it's rare. I've seen connections not properly grounded by the isp in effect shocking the motherboard but I can't imagine this is a common occurrence, especially with modems and routers in place between.

    USB...well unless there's something really off with whatever you're plugging in, it's rare as well. And it should be visible. Like when you're plugging something in, you should see a spark. When you touch the connector with the finger, you should feel a slight shock. If this isn't the case, then it's unlikely.
    Reply to Sedivy
  5. I ask about the USB because lately I've seen that a few USB ports haven't been working properly; my devices are just not detected even when I directly connect them without a USB hub.

    I checked for a slight shock from all the USB ports and I got nothing so I guess that might not be it.

    I guess it must be the PSU after all. I'm a poor college student so I can't exactly afford a new one, I bought the current one very recently so I guess I'll have to make do in the meantime. Any other solutions would be really appreciated though.
    Reply to Aerate
  6. For the usbs, make sure you go to mobo's support page and get drivers. Some usbs will be old 2.0 and some will be 3.0 and the newer ones will need drivers sometimes in order to work properly.
    For the psu, get someone with a multimeter to check voltages for you:
    http://www.wikihow.com/Check-a-Power-Supply (second half of the test)
    If your psu is ok, you can sell it and get something slightly stronger. I gotta tell you though, people often don't think of the psu at all, and go for something cheap, but should your psu go down, it can fry all your expensive stuff in worst case scenarios. Ideally if it's a quality model only psu should go down, but when it's not, it can get horrifically expensive. I've had to replace the whole shebang once cause of psu. Cpu, gpu, mobo and psu. I would recommend, a high quality model, even used, as long as first checked out in repair shop that it's within tolerances is better than a new shitty model. Here's a nice tier list. Stick to tier two for budget/quality ratio:
    http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
    and don't get it off of craigslist or some such crap. If it's refurbished, at least get in an eletronic store where they can help you should you get stuck.
    Whatever you do, don't just make do with the current one. I mean, you could if you take out your gpu, but if you're going to keep pushing it, if it's a crappy model psu, you're risking the above scenario I mentioned.
    Reply to Sedivy
  7. The PSU's a Corsair 450W so I wouldn't say it's some crappy model but if it's causing problems I guess it ain't any lesser than that. You're right, this is why I ended up buying a new PSU(current one) just over a year ago when the previous one went bad.

    For the USB I uninstalled and reinstalled all drivers, didn't work. Checked for updates, there weren't any available.

    I decided to run the thing without a GPU and left it turned on overnight for a full virus scan. Apparently it crashed again after around 4 hours according to the event log. Although after checking it some more, I noticed the error "Harddisk0/DR0 has a bad block". Not sure which hard disk it's referring to, most probably the first one but I ran chkdsk scans on all my volumes and no errors were detected. I could remove the HDD but so far everything has been fine, it's not lie I haven't been able to access any data or anything. Would really love how to fix this HDD, and needed be I'll replace it with a new one.
    Reply to Aerate
  8. Hmm if you ran a chkdsk it should be ok. You can run also scannow (https://www.lifewire.com/how-to-use-sfc-scannow-to-repair-windows-system-files-2626161) to verify all your windows files are ok. Also, manufacturers of hard drives often provide their own hard drive health checking utilities you might want to check out. But if you're not seeing anything pointing to file corruption in event viewer, this is more of a stab in the dark.
    Reply to Sedivy
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