lee300uk

Hi all Firstly want to say im new here so sorry if ive posted in wrong place. Im not that great with pc hardware knowledge and with all new games coming out im finding it harder to run them. I want to upgrade and have doen a scan to see what is my weakest link. So far it always seems to be my cpu and graphics card. Now id like to keep cost to a minimum but open to suggestions. Heres a run down of what i have atm. CPU - AMD Athlon 64 X2 Dual Core Processor 3800+ RAM- 3GB OS - Windows XP Home VIDEO CARD - GeForce 7800 GT At the currant time id say my budget is around £250 english pounds, but if suggestions state i might aswell spend more if i need. Thank you for any advice or suggestions you may all have. Lee