I recently put together a computer and here are my basic specs:
AMD Phenom X3 triple-core processor(2.3 ghz)
MSI motherboard with integrated nvidia geforce 6100se with nforce 430
2 gb RAM
Nvidia geforce 8400gs graphics card (PCI)
I installed all the drivers up to date and my games still run choppy. My games are all choppy regardless of resolution and display settings. I'm not sure why im not getting high FPS even in counter strike source. I use the integrated chipset and the problem is the same regardless of my video adapter. Also, my computer every once in a while just locks up, and i have to turn it off and on. And every other time i boot, i look at my general computer properties and it shows 1.75gb of ram, and then the next time it shows 1.98 gb of ram. If someone could help me with these problems that would be great.