Computer problems

[Mehis]

I have starting to experience these stupid computer crashes ever since Windows informed, that my graphics card crashed. If I render a video, the output will be laggy. If I run Amnesia level editor for 1-3 minutes, the fan starts to spin more louder until it crashes the computer. I can prevent this by just minimizing the editor. This hasn't occured on any other games, though. Sounds like overheating, right?
I'm just asking what should I do? Should I buy new graphics card? Whole new computer? My computer is about a year old, so I don't think I'll need to buy a new one. I haven't checked inside the computer yet, but I'll have a look one day.

Some specs I can remember (I'm not on my computer, so I don't know):
4GB RAM
ATI Radeon HD 4650
Yes, my drivers are up-to-date. I even uninstalled all components and reinstalled them.

Edit: Hurr durr, wrong section isn't it? I thought Help would be for gaming only...

[Supertoaster]

What is your CPU?


A Radeon 5670 is a good graphics card under $100, slightly better then the one you have.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127600

[Mehis]

AMD Phenom II 4 CPUs ~2.6GHz

[shad]

Well if it is overheating, there is no need to buy a new card/processor!

Get a temperature monitoring software (my favorite is HWMonitor, though you could use Speedfan too, or others) and run it in the background while you go about your normal business. If you aren't overclocking (if you don't know what that is, then your'e not) then temperatures for everything SHOULD be below 60 degrees Celsius.

I know you haven't replied in like 9 days, but I'll still try to help.

[Mehis]

Apparently, my GPU fan isn't working. GPU temperature is over 70C... Also, my third fan isn't working.
Thank you!