Need Help On the PSU I bought

I'm kind of a noob. It's my first time building a computer without help. I did a bunch of research and thought I bought all the right components but I just realized that I accidently bought the wrong kind of power supply. I bought a vga power supply, I was in a rush and didn't take time to consider the difference. I have an old 450 watt power supply and without it powering the graphics card I was wondering if it would have enough umph to power theese things:

-Western Digital Caviar SE16 WD5000AAKS 500GB 7200 RPM SATA 3.0Gb/s Hard Drive
-G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ
-Intel Core 2 Duo E8400 Wolfdale 3.0GHz LGA 775 65W Dual-Core Processor Model BX80570E8400
-ASRock X38TurboTwins LGA 775 Intel X38 ATX Intel Motherboard

all that plus a three case fans (which it powered before without problems)

A quick resoponse would be nice because I need to decide if I should rma it.

+1 For returning that PSU and buying a high quality PSU.

You didn't give any specs on your old PSU, but a cheap "450 watt power supply" might as well be 250W. You also didn't say what graphics card you have. I would look at Corsair, PC Power & Cooling, Seasonic, etc...

You definitely don't want to go cheap on the PSU. Here are a few to consider:

Corsair VX450W ATX12V & EPS12V Power Supply - CMPSU-450VX
http://www.buy.com/prod/corsair-45 [...] 66485.html $70.74 -$15.00 MIR

CORSAIR CMPSU-550VX 550W Active Power Supply Retail ***Free Shipping***
http://www.zipzoomfly.com/jsp/Prod [...] t=celebros $88.50 -$20.00 MIR

CORSAIR CMPSU-750TX TX 750W Power Supply Retail
http://www.buy.com/prod/corsair-tx [...] 78325.html $103.74 -$20.00 MIR

It's very possible.

Did you have the motherboard mounted in the case when you plugged in the PSU? If you did, did you remember to use standoffs? I'm surprised at how many people forget that HUGE detail. I would just put everything together and set it on a piece of cardboard before you mount it in the case.

You'll have to get a new PSU to see if it fried anything. If the PSU was working on an old machine and started smoking when you connected it to your new parts, I would say you don't have something connected correctly or have a short somewhere.