PC shutting off

Margaret

Margaret

Margaret

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Joined
15 Nov 2006
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So when I play graphically intensive games (F.E.A.R 2, Mirror's Edge, Fallout 3...etc) my PC will shut off and reboot without warning after a few minutes of gameplay. (can take up to half an hour for it to occur)

I thought my PSU but it has 420W on 12v rails which is surely enough for a 4870 1Gb, C2D@3Ghz and 4Gb of a ram?

PSU specs are here; http://www.akasa.co.uk/akasa_english/spec_page/psu/spec_ak_p050fg7_bk.htm

Stopping all overclocks hasn't helped nor has reinstalling Windows, I've checking all cables are in properly inside my PC but everything seems fine.

Any ideas? I'm assuming it's the PSU so I reckon I'll order a Corsair.
 
86 degrees celsius? only?!

And yes "Should add this only started happening after I got my 4870, was fine with my 8800GT. " might be a helpful thing to note.

I think i have cracked this, its your graphics card :)
 
Is it possible to test another low power gpu and see what happens just in case it is your PSU.
Donwload mem-test and double check your ram.
 
Your not using Rivatuner are you?

You recently swapped from Nvidia to Ati, and that is what I did. I had a threshold setup for the gpu and that caused my computer to shutdown when in the middle of playing games.

:)
 
My mate had problems with a paxpower 430W with an amd64 3500+ and a 1950pro...
He fixed it by buying a 650 w corsair psu. It did also not have a pci-e plug in it's design so his gpu drew power from the molex plugs though a convertor which it probably wasn't designed for...


That said however, my Akasa Powerplus 550W (630W peak) is solid still after 3 years I think now and it's running a Q9550, 4 dimms, 8800GTS512, 6 Hard disks, a dvd writer, 5 Fans and a lot of USB devices... 12V-line voltage solid at 12.1 volt during 100% load according to everest and speedfan ( drops from 12.2 idle).
 
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snowdog said:
My mate had problems with a paxpower 430W with an amd64 3500+ and a 1950pro...
He fixed it by buying a 650 w corsair psu. It did also not have a pci-e plug in it's design so his gpu drew power from the molex plugs though a convertor which it probably wasn't designed for...


That said however, my Akasa Powerplus 550W (630W peak) is solid still after 3 years I think now and it's running a Q9550, 4 dimms, 8800GTS512, 6 Hard disks, a dvd writer, 5 Fans and a lot of USB devices... 12V-line voltage solid at 12.1 volt during 100% load according to everest and speedfan ( drops from 12.2 idle).
Click to expand...

I've got 2 PCI-E plugs in and everything else is plugged in accordingly so really have no idea what it could be, since my PC actually shuts off I'm leaning towards power issue. :(

mysticsniper said:
Your not using Rivatuner are you?

You recently swapped from Nvidia to Ati, and that is what I did. I had a threshold setup for the gpu and that caused my computer to shutdown when in the middle of playing games.

:)
Click to expand...

Nah haven't even tried OC'ing this yet!

RJC said:
Is it possible to test another low power gpu and see what happens just in case it is your PSU.
Donwload mem-test and double check your ram.
Click to expand...

Nah not possible I'm afraid, I ran memtest in December and all was fine I've been putting up with this issue for about a month now you see.
 
Okay have tried that but getting no error logs at all, I had a few atikmdag.sys but that was from accidently turning up the OC settings past stock.
 
Sounds like its definitely your PSU, PSU is a bugger to problem solve since most of the time you wont get errors or anything from it. I'll bet you dont even blue screen with auto restart disabled? Just the painful restart process of "Windows failed to shutdown properly" etc.
 
deleted said:
Sounds like its definitely your PSU, PSU is a bugger to problem solve since most of the time you wont get errors or anything from it. I'll bet you dont even blue screen with auto restart disabled? Just the painful restart process of "Windows failed to shutdown properly" etc.
Click to expand...

Exactly! I don't get the "Windows has encountered an error" prompt when I log back in or anything either.

When playing a game like Fallout 3 or so it will just cut the power after 5-20 mins and then come back on, only seems to do it on the games that stress my GPU more. (ATi CCC says 34% or so utilization when playing WoW!)
If my PC was turning off during WoW then I would have got a new PSU last month for sure :p, but oh well ordered a Corsair power supply for £72, damn credit crunch. :(
 
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Well then yeah its most defo the PSU, at full load the 4870 is making your PSU fall over, I would have tried my best to lend a PSU before buying one though!
 
deleted said:
Well then yeah its most defo the PSU, at full load the 4870 is making your PSU fall over, I would have tried my best to lend a PSU before buying one though!
Click to expand...

Lending one isn't an option unfortunately but tomorrow I shall be back to OC'ing my PC again, good times! :D

Having to lower clocks and voltages to keep it from switching off has been quite boring. :p So many games I'll be able to actually play now too!
 
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