Found this PSU calculator

[Krazy Owl]

http://www.psucalc.tk/

It's more complete so I tought I could share.

 

[entropy13]

http://www.psucalc.tk/

It's more complete so I tought I could share.

More "complete" in the calculations, but lacking in the parts selections.

 

[Krazy Owl]

Fine for older systems I suppose.

 

[burebista]

This is a very nice one but a little bit outdated too (they're working on an updade tough).

 

[brandonwh64]

Just use thermaltake's

http://www.thermaltake.outervision.com/

 

[Mindweaver]

Just use thermaltake's

http://www.thermaltake.outervision.com/

That's a good one, but I use eXtreme Power Supply Calculator Lite which is what thermaltake's is built by. You can upgrade to there pro version for only a $1.99. I've never needed the Pro version..

 

[AlienIsGOD]

but i use extreme power supply calculator lite

^ this

 

[Frick]

It's what I use too. But generally I just go by reviews.

 

[tacosRcool]

its pretty old

 

[Frag_Maniac]

It's more complete so I tought I could share.

I tought I tough a PSUy cat! LOL

Just a caption for your owl.

 

[Krazy Owl]

I tought I tough a PSUy cat! LOL

Just a caption for your owl.

Tweetie bird?

 

[INSTG8R]

Just use thermaltake's

http://www.thermaltake.outervision.com/

Like that one too but as Mindweaver mentions below

That's a good one, but I use eXtreme Power Supply Calculator Lite which is what thermaltake's is built by. You can upgrade to there pro version for only a $1.99. I've never needed the Pro version..

Ditto this is the one I have used for ages. Somewhere along the lines they added the "Pro" payed version but I always thought this one was pretty thorough.

I guess the Thermaltake one would be just as good seeing as it's using the same setup.

/goes and uses it just for kicks, cuz he can't remember the last time he checked his power usage...

 

[Krazy Owl]

Tried eXtreme and it gives me a 283w psu needed but my videocard need at least a 400w psu since it's high-performance AGP.

 

[Frag_Maniac]

LOL, yeah, one of my neighbor friend gals is obsessed with everything Tweetie Bird. That typo just happened to remind me of her. Granted your owl doesn't look anything like Tweetie though.

I also found the eXtreme PSU calculator to be a bit too low in the suggested wattage, and it even has a cap aging factor. It also doesn't seem to give recommended amperage. Not the free version anyway.

I was wondering if it's associated with any of the guys running XtremeSystems forum, because a lot of members over there get by on as low wattage PSUs as they can, despite a lot of them acting like elitists.

Come to think of it, I've yet to see one PSU calculator that's worth a damn. IMO you're far better off just using a system power requirement chart for specific GPU setups, like this:
http://forum-en.msi.com/faq/article/power-requirements-for-graphics-cards