Why does MY PC KEEP SHUTTING DOWN!?

[WhatAreYouLookingAt]

I have this crappy Dell Optiplex 755 that I got and it shuts down by itself and then it turns on again. Here is the temp normally: http://imgur.com/0zzRSsV
Now here is the temp when I play an awesome game like Halo 2: http://imgur.com/CF330QZ what could it be? Could it shutdown because it overheats or because of the psu or mobo.

 

[MarkW]

I do not see any overheating on those screenshots

It would be more likely that the psu is overloading or has a heat issue itself.

But without more info on what is in your system, especially the psu brand and model, plus its capacity, and video card and CPU info, it would be hard for us to help much. We need to know whats there before we can give you any useful help.

 

[ingtar33]

psu would be my first guess.

black screen reboots are almost always an undervolting/power issue. temp problems cause the pc to power down like you pulled the plug out of the wall, a reboot is usually due to some power problem.

 

[WhatAreYouLookingAt]

I do not see any overheating on those screenshots

It would be more likely that the psu is overloading or has a heat issue itself.

But without more info on what is in your system, especially the psu brand and model, plus its capacity, and video card and CPU info, it would be hard for us to help much. We need to know whats there before we can give you any useful help.

I have an ATI Radeon HD 6450, Intel Core 2 Duo E4400, psu specs here:

Input: 100-120V ~/9A 50-60HZ
200-240V ~/45A 50-60HZ

Output: +5V ===/22A Max -12V === /1A Max
+5V (FP) === /4A Max +3.3V===/17A Max
+12VA ===/18A Max +12VB ===/18A Max

Combined Power on +3.3V and +5V Rails not exceed 150W.
Combined Power on +12VA and +12VB Rails not exceed 264W.
Max Continuous Total DC Output Power shall not exceed 305W.

Wait a sec I will be back with the psu brand.

 

[ingtar33]

your system is 6+ years old; I guarantee the power supply is incapable of putting out 300W of power anymore.

 

[WhatAreYouLookingAt]

your system is 6+ years old; I guarantee the power supply is incapable of putting out 300W of power anymore.

But I barely got this system 2 months ago. Also the psu brand is from dell and the model number is L305P-01. Quick update it turns out I got it June 3 this year.

 

[misteriosly]

This is a refurbished system probably. It is over 4-5 years old.
Also those SFF psu's aren't the best, never mind that it says DELL.
If you have warranty go for it, else you could buy a new PSU, which should be from DELL - because of the case form factor and because they tend to make em non-standard, like connectors too.

 

[WhatAreYouLookingAt]

This is a refurbished system probably. It is over 4-5 years old.
Also those SFF psu's aren't the best, never mind that it says DELL.
If you have warranty go for it, else you could buy a new PSU, which should be from DELL - because of the case form factor and because they tend to make em non-standard, like connectors too.

But I have a Mini Tower.

 

[misteriosly]

Tower ? I tho you have SFF case.
Well in tower you can change the PSU, but when i think about it i'm not 100% sure it is the main problem.
Open the case and check MB for swollen capacitors.

 

[MarkW]

Just the fact that you fail to list the brand and model tells me you have a pile of crap for a psu, and you know that is what you have.

Get a good powdr supply, from a reliable company, and I would bet your problems will end.

Here is the other problem though. Since the computer you have is already 6 years old, and most computers die around their 5th year, tossing more money into the dying horse is probably a bit futile at this point.

 

[Hydroshot]

he is using a factory built office pc made by dell and it was made a while back, a medium quality 300-400 watt psu should make it act better and not shutdown on random. Mark it is sometimes hard to tell exact specs from a company made pc because they just simply dont give exact specs of their pc's

 

[ingtar33]

the problem with Dell computers is they often use dell proprietary power plugs and not the industry standard ones so they can get away with charging $200 for a replacement PSU. He's going to have to make sure it's a normal power plug plugging into the motherboard before he purchases a normal power supply from Newegg or Amazon.

 

[Infikiran]

Please see this thread:

http://www.tomshardware.com/answers/id-2212031/power-supplies-work-dell-optiplex-755.html