I have some extra cash and am looking to upgrade my PC. My friend built it for me about 3 years ago, and seeing as I know only the basics about computer building, I'm looking for some advice on upgrade options. Please help with all upgrade possibilities, including if new faster motherboard is needed, etc. I would like to make it around top notch.
Here's whats in my PC:
Intel Core i5-760 CPU
Western Digital, 250GB, SATA, WD2500AAKS-00VSA0
NVIDIA GeForce 8400GS
Thermaltake TR2-600W Power Supply
Mushkin enchanced Silverline (2x4gb) 8gb
Gigabyte H55-USB3 Motherboard
Asus WL-1676 V3 Wireless Internet Adapter
Case is a Thermaltake V9
Any help would be appreciated on ways to improved my PC.