Do I need to get a new power supply

[Copilot]

I am buying some new stuff for my computer, wondering if I need to buy a new power supply.
I don't know what my current powersupply is and don't know how to find out besides opening my tower up.

These are the things I am updating to, would I need something like 500W ?

ASUS M2N-MX SE AM2 NVIDIA GeForce6100 / nForce430 uATX AMD Motherboard - Retail
http://www.newegg.com/Product/...1183&Tpk=asus%2bm2n-mx

AMD Athlon 64 X2 6000+ Windsor 3.0GHz 2 x 1MB L2 Cache Socket AM2 Dual-Core Processor - Retail
http://www.newegg.com/Product/...x?Item=N82E16820146565

Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/...x?Item=N82E16820146565

Thanks for also the help, I am quite a noob with hardware.

 

[Aluvus]

Question cannot be answered without knowing the video card (if not using the motherboard's integrated video) and make/model of the power supply. Yes, you would have to open the case to find out what the power supply is.

 

[Copilot]

nvidia gforce 7600 GT

 

[jkresh]

a decent 350-400 watt should be more then enough for that system (unless you have a lot of hard drives or fans). What psu do you have now (how many watts, what brand, what amperage on each of the rails)?