How much power supply do I really need??

I would forget about getting the older PSU repaired and just buy a good quality 500-650 watt PSU.This will enable you to purchase a faster,more power hungry GPU as well as upgrade your CPU.Not to mention adding another HD if you want.Repairing old PSU is a waste of time unless it is some odd ball thing that is required for the system itself.Even then,I would just replace it.Goodluck.

Dahak

M2N32-SLI DELUXE WE
X2 5600+ (3.2)
4X1GIG DDR2 800 IN DC MODE
TOUGHPOWER 850WATT PSU
EVGA GTX 260
SMILIDON RAIDMAX GAMING CASE
ACER 22IN WS LCD 1680X1050
250GIG HD/500GIG HD
G5 GAMING MOUSE
LOGITECH Z-5500 5.1 SURROUND SYSTEM
500WATS CONTINUOUS,1000 PEAK
WIN XP MCE SP2

300 watts

I agree that a 300 watt power supply is all that's needed.
However, getting a decent quality power supply is going to cost you at least $50. Anything less will be prone to early failure and jeopardizes other parts.
Now, you may ask, what can I get for $50? Looking at Newegg.com:
PC Power & Cooling Silencer 500 PPCS500D (After rebate and free shipping)
Antec Earthwatts EA500
FSP AX500-PN
Seasonic S12 II SS-330.
All the above cost about the same in the end and any will work just fine for your system.

Great, thanks for all the help. The original is under warranty and I was just wanting something to keep my system going while I wait for it to come back.

Antec Earthwatts:

http://www.newegg.com/Product/ProductList.aspx?Submit=E...

Newegg has the 500W model for $50 and the 380W model for $40.