Pc Shuts Down When Playing Games

My PC Shuts Down Automatically When Playing Games.
My Specs:
Intel I3
Nvidie GeForce 9800GT
4 GB Ram
Power Supply 450 w i think
The Thing I'm Sure Of Is Its Either My Power Supply OR The Vga Card.
I Recently Replaced My Power Supply So Maybe It's The Problem.
But The Thing Is When I Turn On A Fan We Have At Home (Not Designed For Pcs) To Cool Down The Vga Card My PC Doesn't Shut Down.
So My VGA Is OverHeating.
But Could It Be My Power Supply? Or Just The VGA Card?
My Drivers Are All Up To Date.

 

Check for heat issues http://majorgeeks.com/Speccy_d6358.html

Speccy should give you the info on heat up to the sec time

 

Hi and welcomr to MG... when you replaced the Power Unit did you check that the 12 volt Rails are sufficient for your card ??? But having said that if the Fan you are using to cool Vid Card seems to fix the problem it sure could be the card.Is it clean ie. no fluff bunnies collected in the fan and cooling fins, take out and give the cooling fan a decent clean with an air can not forgetting to hold onto the fan whilst doing this so as to prevent fan over spinning. Once done make sure card is well seated. Good Luck .. also a 450 watt PSU could be upgraded to a 600 watt at least. Check your actual usage here...

http://www.silentmods.com/modding/PSU_Watts_Calculator.html

 

I would all so recommend this MSI Afterburner http://majorgeeks.com/MSI_Afterburner_d6254.html

You should be able to adjust your fan speeds with this.On the video card.

 

Thank you for the quick replies.
I'll check my vga from dust later although I cleaned it once before...
I ran the Speccy Application
While running Visual Basic 2010, League Of Legends Client (Not The Game), Google Chrome And Windows Media Player:
Cpu temperature is 64 - 68 C
Motherboard temperature is 60 - 63 C
Graphics Card temperature is a constant 60 C
Hard Drives temperature is 36 C
Its too much right ?

 

Well your Cpu is running Hot 154F
motherboard is about 145F
Your GPU is 140F

Your GPU can only take up too 160F total so your pushing the limits of the computer i would say This is what i would do if you or some one you know has a air compressor I would blow the Heck out of it Keep the Fans in place while blowing on the fans and blow out the PSU too make sure its power switch is off.

Are them your normal temps or are they the temps while running games just making sure.

And i would all so Bye some kinda After market cooling fans.
When you look at fans look for a higher Air flow I would start here http://www.newegg.com/

 

Before buying new fans and stuff, i would recommend you clean out your case, make sure your ventilation is all clean and check your temps at that point. Then if things are still high we can look at new stuff. Often times a simple cleaning can make a world of difference. Also bear in mind with the time of year, and temps being hotter outside in many parts of the world, you may need to cool the room the computer is located in as well.

 

Thanks So Much For Your Replies!
So I Did A Cleanup To All The Dust Now (There Was A Lot Of Dust!, Although I Cleaned It 2 Months (Maybe 3) Ago But Maybe Its Because Of The Construction Going On Nearby)
I Took Apart All Except For Cpu, Ram And Motherboard Cleaned Them Off Manually (Without An Air Compressor) Now My Temps Are:
46-50 C, CPU
50 C, MotherBoard
44 C, VGA. (Was 60C Without Playing Any Game, If I Ran A Game PC Would Shut Down In A Matter Of Seconds)
Now I'll Try It For This Couple Of Weeks. But 6 Months Ago (After I Cleaned It Up From Dust), These Sudden Shutdown Still Occured When Playing Heavy Games (Like Crysis 2). This Problem Stopped When The Winter Came Due To The Low Temperature. So I Think There Is Something Wrong Other Than The Dust Issue.
I Did A Temp Check 6 Months Ago And VGA Temp Went Up To 75C Or 70C If I Remember Correct, At Which My PC Shuts Down. So Should I Consider Changing My VGA Card? Or Is My Power Supply Not Delivering Enough Power For The Fans To Work Correctly Or ...

 

Have you a Large intake fan at the front of the case and a Large exhaust fan at the rear of the case as it could be that you have a bad airflow problem, also is there a side case fan directed at the CPU. What sort of room tempature do you have, above 70F ?? If your case does not have these fans we could be on the right track here as for all Temps to be high together I plumb for bad airflow.

 

That's The Problem I Think
I Just Have One Rear Fan. And The Fans On The VGA And CPU.
The Case Came That Way.
So I Should Be Looking For Adding More Fans.
Thank You

 

I would recommend this fan here http://www.newegg.com/Product/Product.aspx?Item=N82E16811999344

And put it in the front facing in it has its own speed controller that you can adjust.And it has a high air flow.