My computer is more or less similar, though I have less RAM, I am a few ticks down on my CPU than you, my CPU is 1.89Ghz, 512Mb PC2100 DDR (400Mhz), and my GFX Card is a GeForce FX 5200 256Mb DDR. As you can see, two main components, RAM and Graphics Card are less than twice yours.
I...