I currently have a Compaq Presario 6420nx which is pretty good. I play a lot of games and want to upgrade the performance. I think it is worth doing based on the specs: OP Sys - Win XP; processor - AMD Athlon XP2200+ 1.8 GHz; Memory - 256 MB DDR SDRAM; Hard drive 80gb + 120gb (added). My thoughts on upgrades are (1)Add another 256 mem stick and (2)add a video card. My questions are (1) Is this enough to make a big improvement? (2)Does my memeory speed have to match the current system (2100)? (2)I have a nVideo G force - FX 550 128 DDR APG8x/4x video card and it states that you have to have a minimum of a 250watt power supply. My system has a 200watt. I have never swapped one out. How can you tell what is compatable and how large should I go? Thanks
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