Re: Stupid question...
upgrade the ram and gpu and you're set.
i used to play source and 1.6 relentlessly on a p4, 512mb, radeon 9200 (agp8x?i think)
I could get a solid 101 fps in 1.6 with the proper tweaks and about 40-60 in Source..after time source actually become a bit smoother..due to Valve/steam caring about it.
Intel Core 2 Duo E8400 ** Intel ASUS P5Q-E 775 ** G.SKILL 4GB DDR2 1066 ** SAMSUNG Spinpoint F1 750GB ** Sapphire HD 4870-Cross-Fire-Diamond HD 4870 ** GIGABYTE 3D Aurora 570 ** 24" BenQ 5ms(1920x1200) LCD ** Vista64