need help regarding quadcores

so ill list my specs first

case = QPACK 2
PSU = 500watt (came with case)
MB = ASRock K10N78HD-HSLi r3.0
GFX = xfx 9600gt
RAM = 4x 1gb modules (667mhz)
HDD = 640 gb sata II

i have an EMU 0404 pci audio interface. also my current cpu is an amd x2 5400 2.8ghz

i firstly need to upgrade my bios to 2.0 so i can use a phenom chip, but i want to first know; If i will need to upgrade my psu?

 

You're OK with 500 good watts as I'm running:

Intel quad Q6600(running @ %100 24/7)
4GB RAM
a pair of 9800GTs(OC'd)
3 HDD's

all on an Antec Earthwatts 500W which is a quality PSU. I don't know what brand of PSU you have but those that come with cases are usually the cheapest around.

 

As you have stated the POS, sorry, PSU came with the case, I would suggest that it can actually produce no more than 350W consistently without taking a slight dump.

I would recommend upgrading it just to be on the safe side, even though you may not need it now a cheap PSU failing could have a very big impact on the computer, like frying everything in it.

Have a look here for some quality brands: http://forum.pcmech.com/showthread.php?t=208143