PC crashes then no power on - help v much appreciated

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ukmdzeus

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Jun 10, 2014
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Hi guys,

So I recently built a computer, about a two weeks ago. About 4 times since then it has crashed while I've been gaming, as in the power button stays lit up but the fans all go off and I hear a buzzing/interference through my headphones. I cut the power, then when I try to turn it back on, there's no power up at all - the power button won't light up, no fans on, nothing. Every time, I reconeect the front I/O connectors and make sure all the cables are pushed in properly, and after about ten/fifteen minutes of this it turns on a works perfectly normally again. Do you think it's a cooling problem, or something else? I'm not overclocking at all but it always seems to be happening while gaming. I did find in my last look inside the case that the cpu cooler was not properly seated in the mobo, as in a bi wobbly and not all the legs were down rigidly into the mobo - could this be it?

My build:

i5 4590
r9 270x
8gb ram
as rock h81m mobo
stock cooler
2 case fans (front and back) in Cooler Master n200 case
EVGA 500W ATX12V / EPS12V power supply
+hard drive, optical drive

Thanks very much
 
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D
66c for your i5 is a bit hot I think even while gaming, I would expect about 25-30 idle and 45 - 50 load. So an aftermarket cooler would indeed be very helpful there.

Your graphics card is performing well within range, there is no issue there and if you think it is a bit too hot for your system then just use Catalyst Control Centre and set the fan speed yourself as the software isn't always that great at Temp V Fan ratio.

Your best bet now is to get an aftermarket cooler for the i5 chip and use furmark to push your graphics card and make sure the computer doesn't reset or freeze and also use very CPU intensive games to make sure that a full game load isn't the problem either (don't bother with CPU stress tests until you get a new...
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Designs

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Dec 25, 2008
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Given what you have said then its probably a combination of power - heat, have you since re-seated the CPU and tried again ? if the problem happens when fully loaded with games and as you said it take its time before it will power on, then this suggests the I5 may have overheated, or the PSU doesn't have the power, but as its a brand new build I would check out temperatures first.

Get it working and get some monitoring applications, I'm sure if you keep an eye on temperatures and CPU-GPU usage then you will find the cause of the problem in no time.
 
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ukmdzeus

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Yep I've reseated it till I cant move it at all. So I measured temperature, using Open Hardware Monitor. Max CPU temp while gaming = 66 degrees C, max gpu while gaming = 75 degrees C. Is that too hot do you think? Should I get an aftermarket cooler as well as my 2 case fans?

Cheers
 
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Designs

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66c for your i5 is a bit hot I think even while gaming, I would expect about 25-30 idle and 45 - 50 load. So an aftermarket cooler would indeed be very helpful there.

Your graphics card is performing well within range, there is no issue there and if you think it is a bit too hot for your system then just use Catalyst Control Centre and set the fan speed yourself as the software isn't always that great at Temp V Fan ratio.

Your best bet now is to get an aftermarket cooler for the i5 chip and use furmark to push your graphics card and make sure the computer doesn't reset or freeze and also use very CPU intensive games to make sure that a full game load isn't the problem either (don't bother with CPU stress tests until you get a new cooler or you may risk irreversible damage).

I think that the CPU caused all the problems with crashes, So you should be good to go. just keep an eye on those temps.

72°C <--- this is your i5's max operating temperature, Your close to it and that's why I mention the cooler. [ Do not exceed this ].
 
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ukmdzeus

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Jun 10, 2014
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thanks very much for your help,

yes it happens during company of heroes 2 which is apparently a cpu intensive game, though it hasnt happened again yet after me reseating the cpu heatsink. What do you mean by full game load being a problem?

I'm slightly confused as to why the stock heat sink would not be good enough to cope with this - could it be a faulty chip?

where did you find that info on the max operating temp? i thought cpu's were fine up to 100 degrees C? thanks

i'm think of the cooler master hyper 212 heatsink? do you have any recommendations?
 
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Full load game basically meaning when your using a CPU intensive game and its loading the CPU-GPU-RAM at the same time as high as possible.

there is a possibility of a faulty chip, but maybe you damaged the thermal paste re-seating or damaged the chip running it with a heatsink not properly installed. the max operating temperature is listed on intels website and available to all.

the Hyper 212 is fantastic cooler, I use it with my fx-8350 and I have never hit above 55c and this is a high TDP chip and 8 cores.

Chances are the CPU and heatsink are both fine and you haven't done any damage, but you need new thermal paste to re-apply the heatsink properly and look into the aftermarket cooler.
 
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