Intermittent system freezing

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Joined
8 Jan 2010
Posts
11
Hi,

I've been having a strange problem with my PC for the past 12/18 months and figured I should get round to fixing it. When I'm gaming the PC sometimes completely freezes. It stops responding and the sound starts looping. Reboot it and everything's fine again. I've only had this when gaming and have noticed it when playing both Borderlands 2 and Dungeon Defenders, the two games I play most often.

My first thought was that something was overheating, so I ran various temperature monitoring tools and nothing showed up (though I haven't found a reliable way to reproduce the fault so it's hard to test).

Over time the problem got more frequent and as my temperature investigations were going nowhere I tried replacing the graphics card (it was getting old as well). I swapped it out for a super underpowered AMD thing that could barely run games and never had any problems (though also didn't do much gaming and the most taxing game I could play was Dungeon Defenders on pretty awful graphics).

A short while later I upgraded my graphics card to an AMD 6850 and lo and behold the problem returned, though nowhere near as bad as before (though my usage pattern has also changed - I was on holiday when it was really bad and playing a lot of games, now I'm gainfully employed and only play in the evenings a few nights a week).

Someone suggested it might be the PSU being incapable of supplying enough power to the system, so I took a look on http://www.extreme.outervision.com/PSUEngine but that implies I have enough power. (I can't actually remember what my PSU is but it's better than 500W I think. I'll check when I get home tonight. It's a Corsair TX 650W) I'm aware it's quite old (probably getting on for 4-5 years), how much would that reduce the output by?

Does anyone else have any idea what might be wrong or what I should try to do to fix this?

PSUEngine output:
Code:
System Type:		1 physical CPU	
Motherboard:		Regular - Desktop	
CPU Socket:		Socket LGA 1155	
CPU:		Intel Core i5-2500K 3300 MHz Sandy Bridge	
CPU Utilization (TDP):		90% TDP	
			
RAM:		4 Sticks DDR3 SDRAM	
Video Card 1:		AMD Radeon HD 6850	

ATTENTION: FOR PERSONAL, NON-COMMERCIAL USE ONLY
			
Regular SATA:		2 HDDs	
			
DRAM SSD:		1 Drive	
DVD-RW/DVD+RW Drive:		1 Drive	
			
USB:		4 Devices	
Front Bay Card Reader:		Yes	
			
Fans			
Regular: 		2 Fans 120mm;  1 Fan 250mm;	
			
Keyboard and mouse:		Yes	
			
System Load:		90 %	
			
Capacitor Aging (+ W %):		30 %	
			
 
Minimum PSU Wattage:		395 Watts	
Recommended Wattage:		445 Watts
 
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Between your card swaps did you replace the AMD drivers? And do you have the very latest for your card now? Your card only requires 500w so your PSU shouldn't really be an issue. Normally, in my experience, if it's a power issue the machine will switch off without hesitation, whereas yours is hanging around and looping audio.

Have you checked your Event Viewer under the Application section to see if it gives an error codes as to why it is crashing? My first thought would be the drivers need updating though.
 
My original card was an Nvidia 8800GT so I had to change drivers completely. They also changed again between the AMD 5450 I used as a stop gap and my current 6850. I'll see if the drivers need an upgrade tonight but as I've changed both drivers and card several times now I was thinking that the graphics is unlikely to be the problem.
 
its usually memory related,setting or voltage if its randomly freezing

try one/two clicks more than what auto is using for cpu northbridge voltage
 
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