PC randomly shuts down

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cyphacipher

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First, my components. Ryzen 1700 (non oc), 16gb geil evo-x rgb ddr4 2400mzh ram, asrock gaming-itx/ac mini itx board, 128gb toshiba nvme drive. 1 tb western digital hd. PNY 1050ti XLR8 card, water cooling. My pc turns off during gaming only randomly. Functions fine any other time. Sometimes I can play 10-16hrs (im on vacation, don't judge lol), sometimes it will cut off as soon as the game loads up. I was using Win 10 pro fully updated and it would power off almost 100% of the time playing Farcry3/4. On bulletstorm it crashed only a few times. I thought it was something wrong with the OS, so i downgraded to win 7 ultimate. It seemed to work a little better, but still had issues. I got a brand new 1050ti on the 30th of Dec 2017 (exchange from best buy), still the same issue. I figured it was the power, so I took the Corsair CX 550 out and put a EVGA 500 and a Ultra 650 watt in. Still shut down on using those. I did a 2 pass test with memtest86 and microsoft memory diagnostics and memory passed. Tested the NVMe and HD with toshiba tools and seatools, no issues. Cpu at full load during gaming is only 49 deg, and gpu is at 65 according to Afterburner. And finally, event viewer only shows, "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly." The only thing I can think of is the motherboard, but this pc is only 4 months old (built sept 2017). Any ideas?
 
Solution
marksavio
im sorry man. i really dont know what else is there. i do hope somebody else will give a 2nd opinion on your post. all the symptoms are pointing towards a power supply issue. specifically on the v-rails (continous power) to sustain your GPU. or if youre living in an area prone to power failures or voltage drops. or you are using a uneliable extension power cord or something.
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marksavio

marksavio

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first thing i already noticed is your RAM. so i doublechecked on RAM compatibility for you board and i found it only support 4GB RAM stick @2400Mhz. i would always assume their list is accurate and updated frequently tho. since uv replaced almost every part of your setup. why not try to buy a new pair of RAM sticks included in this list.
https://www.asrock.com/mb/AMD/Fatal1ty%20X370%20Gaming-ITXac/#Memory

it could also be your CPU temps. have you tried to do a CPU stress test with prime95 and see if it shuts down. and download HWmonitor if you see temps spiking. if they are both fine. then its highly likely your faulty mobo.
 
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marksavio

marksavio

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if you filter by vendor. which is geil. basically if you dont see your RAM specs on the list then theres a high chance youll run into problems with it. since it isnt verified and untested on their boards. i highly recommend you try a different RAM stick included in the list.
 
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cyphacipher

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Prime95 didn't crash the system. The cpu was @ 100% for the last few hours. Temps were normal, around 52deg full load, didn't go much higher. It didn't shut down once, yet it shut down 2x in a row when I ran far cry 3, roughly 3 min (or less) after gameplay started and the system was not under load, nor were the temps high (about 39deg when the game started). It's not a cooling issue. It's 14deg outside, and my window is open with the pc in front of it. HWmonitor records the core cpu temp at 29deg Cels at this moment. I have concluded it only shuts down when doing GRAPHICS demanding work, as prime95 couldn't kill it with cores at 100%, yet FarCry 3 killed it 3x with the core average at like 40%.
 
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marksavio

marksavio

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then its most likely the choice of PSUs you had for your system. sudden shutdown is not a symptom of faulty RAM so we can rule that out and its more pointing towards the PSU. CPU is confirmed working as it should iwth proper temps. and you got 2 different GPUs with the same result.

youve tested with only these as stated on your original post

  • Corsair CX 550
    EVGA 500
    Ultra 650W
the Corsair may not have been sufficient to provide stability for your ATX build and CX is on the low-end of the series. and it may have been failing already due to age and use. at least get a RM from the Corsair series. and replacing it for test, with an EVGA with less power limit doesnt help much. and the Ultra isnt well-known. never cheap out on your PSU since its the heart of your build and wil last you a long time. so try getting at least the RM instead or the AX which best (but not necessary) if you want to stick with the Corsair brand. you can stay with 550W as that is enough power for your system. among the budget 550W range the popular ones are

  • EVGA SuperNOVA G2 550
    SeaSonic M12II 620
of course you can always open up a new thread post to ask for suggestions for budget 550W PSUs. im sure there are many here who would give you suggestions.
 
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cyphacipher

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I just ran a test. I ran Furmark (opengl) and did the stress test. Ran for a nice long time. No issues. Then i ran Heaven benchmark. I set it on extreme (directx11). I ran it 7 times in a row with these settings: API DX11, Settings: Ultra, Tessellation: Extreme, AA: 8x. Grabbed a stopwatch. As soon as the benchmark started rendering the pc shutdown in 6.3 seconds. 100% of the time. The system power draw of this machine is only 380 watts at top load. The Corsair, and the EVGA were well withing spec for power delivery, and even though the Ultra was slightly used it was overkill at 650 watts. The Corsair CX550M and EVGA were brand new from BestBuy (Corsair is mine, EVGA is my sons).

I do agree about the power supply though. I had read that the CX-M series were the new series to replace the crappy CX series from earlier. The EVGA that you posted is the one my son had, the G series.
 
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marksavio

marksavio

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okay lets agree that the PSUs have no problem. we can look into the OS power plan. have you tried checking your event viewer logs to see any error/warning related to power before the critical shutdown error?

you can also try telling your OS to use more power. change it to high performance if you havent already. and go to your nvidia contorl panel. 3d graphic settings. global. power set to adaptive/high.

btw, even though your system does not go over the peak wattage. it will fail if the PSUs does not have reliable continous power output thru the 12V/5V power. the latter is what we should usually look for in determining a good PSU.
 
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cyphacipher

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Ok. Just ran Aida64. 12v rail min 12.038, max: 12.144. 5v rail min: 5.040, max: 5.040. 3v min: 3.248, max: 3.280 (which is normal from what i read +/- .3). CPU max temp was 48deg, and motherboard was 49.
 
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cyphacipher

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Checked eventviewer. These are the only errors I get. "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly." and "The previous system shutdown at 5:34:12 AM on ‎1/‎2/‎2018 was unexpected." Power plan is set to balanced. I did change it to Performance earlier, that didn't help. The system turned off on the first run of FarCry3 after I changed it.
 
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marksavio

marksavio

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Dec 23, 2017
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im sorry man. i really dont know what else is there. i do hope somebody else will give a 2nd opinion on your post. all the symptoms are pointing towards a power supply issue. specifically on the v-rails (continous power) to sustain your GPU. or if youre living in an area prone to power failures or voltage drops. or you are using a uneliable extension power cord or something.
 
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cyphacipher

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Feb 12, 2013
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You may be right. I'm gonna rma this power supply from Corsair.
Get a EVGA 650 or so. I noticed when I game, my gpu utilization is at 99/100%. I'm pretty sure it's drawing alot of power, even if the cpu isn't.
 
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