Which PSU would i need

[Rumple]

Im looking at the OCZ modstream PSU's. I cant decide if i need the 520W or if the 450W will be enough.

Here is what i will have in my rig:

Epox EP-9NPA+Ultra
AMD64 3700+
Evga 7800GT CO
WD Sata 80GB HD
NEC ND-3550A DVD
Audigy 2 ZS
Mitsumi FA404A 8 in 1 floppy
4 92mm case fans

I really have no idea how much power i need. I just know that the crappy PSU i have now isnt going to cut it and i dont want to buy something that is too big or too small for my needs.

The only other PSU i am considering is the Antec Smart Power 500W. I want a modular PSU since i dont have many components i really hate all the wires floating around my case. And i really dont want to spend much over about $80 if i dont have to.

Thanks for any input guys.

 

[halw]

Check Extreme PSU calculator for the size PSU you will need.

 

[Akhen]

or http://www.jscustompcs.com/power_supply/

 

[Wentelteefje]

Hmm, those "calculators" aren't very precise IMHO... The wattages they predict are usually waaay too high... You'll be fine with the 450W version, but the Antec is a better option IMO...

EDIT: Consider this Enermax Liberty as well... May have less output, but sports dual 12V rails, "SLI compatibility", and a very high efficiency...