D600 game playing problem

Hi, all

My latitude D600 can play games smoothly only for the first several minutes. After that, i can hear cpu fan is runing hardly and the game just slow down significantly. I have to exit the game and wait for a few minutes b4 restart the game.
Anyone is in the similar situation?
The game i played is pretty old, like splinter cell I, counter-strike 1.6
The system requirement of splinter cell is:

* Windows 98/ME/2000/XP
* 800 MHz processor (1000 MHz + recommended)
* 256 MB of RAM
* 32 MB video card (64 MB recommended), supported chipsets: ATI Radeon 8500/9000/9500/9700 NVidia GeForce 2 Ti/Ultra/Pro/GTS/MX400 NVidia GeForce 3 family NVidia GeForce 4 family Matrox Parhelia
* 8x speed CD/DVD drive
* 1.5 GB hard disk space
* DirectX 8.1 compatible sound card
* Keyboard, mouse

So my laptop should play it, right?
Thanks.

Message Edited by datasunny on 04-26-200608:18 PM