Why do games run so slow

[peripoo]

Hi i have pc with the following specs:
Amd 8450
win xp
1 gb rendition ddr2 667mz
seagate 500gb sata 7200rpm
asus m3n78-vm motherboard
NVIDIA GeForce 8200 (shared)
500w power supply

I have tryied to play games from the hard drive like call of duty 4 but the game is very slow how can i make it run faster?

[Ajmukon]

well, there are several factors that affect game speed.

One such factor is the number of running processes in the background.

However, the biggest reason i see is "Geforce 8200"

That is one of the worst graphic cards on the market.

to play games at a good speed, you need at least at $150 GPU

You should think about upgrading the GPU

[123456]

Hmm, I had a GeForce 8400 and it ran COD4 at full speed for me... More RAM will definately help.