Doom III requires atleast 384 MB, i have 256 MB installed running WINDOWS XP SP2 Home Edition. Should i increase RAM or get a Good Graphics Card. Budget 6.5 K ??? My Current Config is : PC 2100 DDR , INTEL EXTREME GRAPHICS and P4 1.9 GHz. I m plznning to buy KINGSTON 512 MB DDR. and may be a Graphics card???