New Build - Limited By Current Power Supply

I'm looking to build a new computer (my first build) reusing my case and power supply. My power supply is only a 390w so I know it's going to limit what I can do. I'm hoping to spend no more than $450 and come up with something that will last for a couple of years and get me comfortable with building computers so I can build a much nicer one in a few years.

Approximate Purchase Date: as soon as I can get a good setup figured out

Budget Range: under $450

System Usage from Most to Least Important: internet, gaming (Civ series), music, excel, movies

Parts Not Required: keyboard, mouse, monitor, speakers, OS, power supply (API5PC17), Antec (SLK2650-BQE)

Preferred Website(s) for Parts: newegg.com

Country: United States

Parts Preferences: AMD, GeForce

Overclocking: No

SLI or Crossfire: No

Monitor Resolution: 1920x1080

Additional Comments:

Here is what I have picked out so far. When I tried looking up power consumption I got mixed results with some showing my power supply would work and others saying it wasn't enough. Any help confirming what I have will work or any suggestions on pieces to switch out that will work better would be greatly appreciated. Thanks in advance for any help.

ASUS M4A87T motherboard
http://www.newegg.com/Product/Prod [...] 6813131699

AMD Athlon II X4 645
http://www.newegg.com/Product/Prod [...] 6819103885

Galaxy GeForce GT 430
http://www.newegg.com/Product/Prod [...] 6814162067

G.Skill DDR3 RAM
http://www.newegg.com/Product/Prod [...] 6820231422

Seagate Barracuda Hard Drive
http://www.newegg.com/Product/Prod [...] 6822148767

ASUS DVD Burner
http://www.newegg.com/Product/Prod [...] 6827135204

AGI 390W Power Supply - Already Have
http://sewelldirect.com/390W-ac-to [...] supply.asp

Antec Case - Already Have
http://www.newegg.com/Product/Prod [...] 6811129148

Hi there! Welcome to the forums.

First of all, it's not worth keeping that PSU. It looks like a piece of crap and is going to bottleneck your system. Here's a few pointers I would make:
-Grab a cheap (but quality) 400-500w PSU for ~$45. Corsair, Thermaltake, Antec and Silverstone all offer compelling options at this pricepoint.
-Drop to a tri-core. It will give you the power you need or less.
-Get a cheaper mobo. That one is pretty feature rich, yet doesn't even support AM3+. Look for one that's around ~$70.
-Use the saved money to grab a better GPU. Something like a 6770 would probably get the job done, although a 6850 would definitely be preferable. You'll need to buy a new PSU, so use what you have left to determine what you should get.

Hope that helps a little!

Much better!
if you buy this GPU today (haha I know i'm rushing you) You can get it for $120 with rebate and promo code. That's a steal, as it outperforms the 550 Ti by a significant margin. http://www.newegg.com/Product/Prod [...] 6814102908

Go ahead and swap the PSU for this one: http://www.newegg.com/Product/Prod [...] 6817139027 It's $2 and slightly better quality.

Everything else looks pretty good! The Tri-core could end up limiting you further on down the road but i wouldn't worry, as it won't happen until you get a higher end GPU.

You got an XFX 6850 that costs $120? I'm all ears if so.

OP, you may wanna look at this chart. Maybe we should switch to a Pentium G630, eh? http://www.tomshardware.com/review [...] 20-10.html