Applications running slow, CPU fan is going fast

[techsuitor]

My PC has games like GTA San Andreas, Counter Strike 1.3, Warcraft 3 Dota All Stars and Kill Switch. Also, I have applications such as, Adobe Photoshop CS3 Portable, Dreamweaver, Macromedia Flash MX, etc. Oftentimes, while playing GTA San Andreas or Warcraft, I am experiencing slow motion movement of my screen. And if I still continue playing, my computer has shutdown, or sometimes, it restarts. I also noticed that my CPU fan is so fast.

Are you familiar with this problem?

Thanks in advance.

 

[JMMD]

Could be overheating, check the CPU temps when the machine shuts down.

 

[techsuitor]

Thanks for the reply JMMD.

I always checked my PC's temp. but its alright. Hmm... I only noticed that my CPU fan spins so fast. then it'll restart.

What do you think?