I primarily play FPS such as COD3. Money is not an issue. Looking for upgrades that will make a difference. Specs are as follows. Thanks.
Microsoft Windows 7 Home Premium 64-bit SP1
AMD Phenom II X4
Deneb 45nm Technology
4.00 GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
ASUSTeK Computer INC. M5A88-V EVO (AM3R2) 43 °C
AMD Radeon HD 6900 Series (ATI) 42 °C
932GB Western Digital WDC WD1001FAES-75W7A0 ATA Device (SATA) 40 °C
596GB Western Digital WDC WD6402AAEX-00Z3A0 ATA Device (SATA) 40 °C
ATAPI iHAS124 B ATA Device
AMD High Definition Audio Device
If all you are playing is cod3 then I don't see why you would upgrade. Also you need to be more specific with parts. do you have ddr2 or ddr3 ram? What phenom do you have? 6900 series can mean a higher up midrange card, or one of the strongest card that exist. But still if all you are playing is cod3 then I think investing your money in something else is a better option.