Problems... PC Automatically Turning off

Dammiz

Dammiz

Dammiz

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Hmmm k ppls I recently built a new pc (about 3 months ago..) but I cant seem to get rid of a very annoying prob:



My PC whenver it's stressed I.E. During gaming/Stress Test Etc... Regularly just shuts down... :/ I've noted this prob ever since I built it but @ first I thought it was just because my pc was oc'd far beyond it's limits..

But after setting everything back to stock volts/clocks I still keep getting this prob. Btw this happens to me after a few mins to max an hour into stressing my pc and then it just automatically turns off.. (No Shut down or blue screen.. as if u turned it off from the plug)

Sometimes when it turns off and I switch it back on it turns off again even during the POST.. which seems to rule out a prob from the psu since during a post only a minimal ammount of power is used and also If it was capable of running the pc stable Overclocked to 3.8Ghz from 2.6Ghz stock it should at least work properly @ 2.6Ghz since much less power is being used...



PC Specs Are Here:

Mobo: EVGA 680i LT Mobo with latest bios

CPU: E5300 (Was overclocked to 3.8Ghz @ 1.4v is now back at stock 2.6Ghz)

RAM: 8Gb Crucial 800Mhz Ram (4x2Gb Sticks)

VGA:ATI X1600PRO (Bought as a temporary vga till I buy something better)

Cooling: Adequate (CPU @ ~40C Idle 50C Stressed / N.Bridge 45C S.Bridge 50C)

PSU : Logysis 650W Nominal power output 750W Max (22A 12v1 Rail 22A 12v2 Rail)



Do You think this could possibly be a problem with overheating? since the n.bridge and s.bridge are both running @ about 50C idle?? :/

Thx for ur help ppls :)
 
I would think it's heat or RPM related myself, not sure though.
I would look through your bios and increase any fan RPM low warning options.
Also look for max temp warnings aswell, increase them if you can.
 
moppy89 said:
This is the kinda thing that scares me about building my own PC for the first time :(
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Heh lol Shhhh :P oh well i guess It's a risk u must take when building ur own pc eh :/

thing is that i'm used to fixing all my pc's probs but this one has really got me stuck eh :(
 
If it's shutting down on heavy load, it's most likely either overheating or not getting enough power. My money is on the PSU. It's not a reputable brand.
 
reflux said:
If it's shutting down on heavy load, it's most likely either overheating or not getting enough power. My money is on the PSU. It's not a reputable brand.
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Hmm ic actually that is what I first thought my prob was but after underclocking my pc back to 2.6Ghz from 3.8Ghz I saw no improvment in stability and I guess it should be much more stable @ the lower clocks since the PC will be using much less current from the psu eh? Also the psu should have no prob running this pc at those specs since it currently has a very low end vga which does not use much power and also the CPU has a TDP of 65W so i'm guessing even if it's a lower quality psu it should be very capable of handling this load.. ?? :/

tried running occt stress test for the last 2Hrs and the temps seem to have stablized here. which seems like during load the heatsinks seem quite capable of the extra power running through them.. :/


BTW something i noticed is that these strange shut downs seem to be occuring only during gaming since the only time my pc turned off during a stress test was in the begenning when I was running my pc @ 3.9Ghz which might have meant that the oc was slightly unstable.. since reducing the oc slightly and recently completly removing the oc no shutdowns have occured during stress tests. only during gaming has this occured.. :/

I'm begenning to suspect my old **** vga is the cause of this tho I'm not sure if a faulty vga could be the source of such probs.. One imp thing to note is that when I got my vga through EBAY it arrived with one of the solid state capacitors snapped off which I immideatley replaced with a normal electrolytic cap of the same specs (16v 1000uF)

Btw here is a pic of my temps and voltages (Voltages all seem stable and no ripples and fluctuating in voltages)
PCDataLoad.jpg
 
Have you got the most recent drivers for your VGA?
What games have you tried? At which point in the game does the PC fail?
Try running prime95 stress test. This will confirm if its a CPU/RAM issue.

Sorry I don't know of a decent GPU stress test........
 
WalesOwl said:
Have you got the most recent drivers for your VGA?
What games have you tried? At which point in the game does the PC fail?
Try running prime95 stress test. This will confirm if its a CPU/RAM issue.

Sorry I don't know of a decent GPU stress test........
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Iv'e only tried the most recent drivers available for this VGA but im guessing that if it's a driver issue I would get some sort of lock up / Blue screen if it was a fault from them..

Btw The only games I play on this pc are COD 2 & 4 but the pc does not seem to fail at any specific point it's very random and sometimes it does it after a few mins and other times after an hour of gaming :confused:

i'm downloading and running prime 95 now and will post the results tomorrow morning after iv'e left it running overnight...
 
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Hmm k ppls so I ran Prime95 overnight (8Hrs 35mins) and it seems that there were no probs there :/

So I think that the PSU/MOBO/RAM/CPU are all k since they were capable of running stable eh?

Am I Right to be guessing this?

I Guess Then that the only other possibility for a fault will be the vga...?? prob is that i'm not sure I ever heard of a vga causing this kind of a prob eh...???
 
Hmm ic but then I guess wouldn't running prime 95 for nearly 9hours stress out the psu enough to cause the pc to shut down like usual? All volts seem very stable and dont fluctuate at all except for the +5v standby going to 4.87v from 4.90 and the +5v going to 5.09v from 5.12v (lower volts under stress compared to idle)
 
Got correct volts running through RAM? Screenie shows 1.9V. Is that what the Ram should be? My old crucial was 2.1 IIRC.
 
Yes well actually they are rated to run @ 6-6-6-18 @ 1.8v but i'm currently running them @ 1.9v just to make sure.. memtest seems to run ok on them for several hours... actually had them running @ 5-5-5-15 900Mhz~ 1.9v prime stable :/ so I dont think this is a prob from the ram :/

Do you know any good test to check out if my vga is ok??
 
Hmm k so I ran 3d Mark 06 (only VGA Test I Could think of.. :P) It ran well @ Standard settings and then I rebooted and set I back at a reasonable oc (CPU E5300 (2.6Ghz 1.20v) @ 3.7Ghz 1.36v / RAM 800Mhz 1.8v 6-6-6-18 @ 911Mhz 2.0v 6-6-6-18) and it also ran perfectly... :/ aargh somehow the prob seems to happen only during actual gaming... like wtf ?? :/
 
back to the drawing board :/

basically i'm stuck here since the pc seems to pass All tests I throw at it (Prime 95 for ~9Hrs---OCCT 2Hrs---Memtest 2Hrs....) Also tried running 3D mark 06 on it and it run sucessfully.. but that is rather a short test and would not load my pc for long enough.. up to a few mins ago it was running ok but now whilst playing Battlefield Heroes It just Shutoff again :/ AAARRGGGGGGGHHH....

Do any of you know of a way to stress test my PSU and VGA Seperatley to see from where my prob is coming??? thx ppls and sry for asking for the millionth time but this prob is really getting up me now eh :/
 
It's either the PSU or a cooling problem.

I would take the side of the case off, and get some kind of desk fan and point it into the case. Run all the PC's fans at maximum and load up some games. That should be enough to rule out a cooling issue.

It's really the classic symptoms of an underpowered PSU though. It's odd since that system should barely draw any power - but then again, Logisys PSUs seem pretty obscure and fairly cheap and nasty. Any chance you can borrow a decent PSU to test with?
 
Tried taking the side of the case off already but I dont think it's a prob with cooling since @ load the temps dont seem to go too high... (see the previous screenshot for the exact temps)

Prob is I dont have another psu lying around to test the pc with but whilst stress tested over night with prime 95 it does not seem to have any probs :/ btw right now it's oc'd back to 3.7Ghz and ram @ 910Mhz~ and it's no less stable :/ only during gaming does this prob occur...

btw after it turns off and I turn it back on again immideatley it somtimes will turn back off immideatley even during post :/

anyways here is a pic of the capacitor I had mentioned earlier from my vga which i replaced with a cheap electrolytic instead of the solid state one there was before since it was broken off in shipping... (I placed a red circle around it) It seems like it's quite an imp cap in the vga since it's the only one which is solid state :/

x1650pro.jpg
 
your temps are fine to low...nothing wrong there!

it sounds like the early stages of the PSU, mine started doing this a year ago....get close to it.......DOES IT MAKE A NOISE.... a high pitched noise.

does the MOBO make a similar noise ?

replace that Capacitor again with a higher quality one...good luck, it's very scary isn't it.
 
Mal X said:
it's very scary isn't it.
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hehe not really actually since the vga was bought for a very cheap price off a competitors site (10£ :P ) and is only meant as a cheap replacment untill I order my vga later on this week :)

PSU / mobo are not emitting any high pitched whine which ususlly means a psu failure :/

the prob im having is that I know that the prob is from either the VGA or The psu but I dont have the $$ to replace them both right now and since I was intending to buy the new vga in a few days if it's a prob from the vga it would be great for me since everything would be solved but if it's a prob from the psu I'll end up with a non functioning pc since the new vga will definetley pull more power from the psu :/

at least if i'm sure it's a psu prob ill just buy a new psu and forget the vga for now eh :/
 
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