HELP! Upgrading MOBO, CPU, AND RAM

[zeem]

Current Specs:

CPU : Pent 4 630 (3 GHZ Single Core)

MOBO: Asus P5LD2 (Rev 1) (Best compatible chip is 775 Pent D)

RAM : 3 GB DDR2 667Mhz




Want to buy : CPU, MOBO, and RAM with significant boost in performance for $350 or less...




My other components that I'd like to Keep =

Case
Thermaltake 550 Watt PSU
Seagate Barracuta 750GB HD
DVD Rom Drive
DVD Burner
Nvidia 9800GT Video Card

 

[obsidian86]

GIGABYTE GA-MA770T-UD3P AM3 AMD 770 ATX AMD Motherboard

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128392

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL7D

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231276

AMD Athlon II X4 620 Propus 2.6GHz 4 x 512KB L2 Cache Socket AM3 95W Quad-Core Processor

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103706

$278.98