How can I fix lagging in Crysis?

Definitely both, lol. Get at least 4gb of DDR3(its relatively cheap). Depending on how much you would like to spend, med-high is definitely a possibility. What you need to check first is you motherboard. Judging by the low amount of memory, I can assume your set up is rather old. You are goin to want to make sure your board has a PCIe 16x slot and supports DDR3 RAM.

If you have a P4 your board will not support ddr3.

You are looking at a whole new system to be honest. AGP graphics cards have been outdated for years, ddr 1 is massively outdated and so is your processor/motherboard.

Sorry!

Ok thanks for your response. I am trying to get some money together for a cheap Athlon II X2 system, but that might take a while, that is why I just wanted to see of I could upgrade my current system.

Best answer selected by Walkingepidemic.

You in the UK or US? Maybe a member has a suitable system laying around that you could buy?
Moto