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Please help me calculate power requirement

\015 I'm trying to figure out how many amps at 12v the system I'm building will require, since it seems like the true limit of basically any PSU is the amount of power is supplies on 12v rails. I have a PSU that supplies 17A at 12v and I'm hoping that will be enough. The system is pretty basic:ASUS M3N78-EM mobo with NVIDIA GeForce 8300 onboard videoAMD Athlon 64 X2 5400+ Brisbane 2.8GHz 65W processor1 SATA HD1 SATA DVD-ROM driveMay add one or two IDE or SATA HDs and a TV tuner card down the roadI'm having trouble finding data on how much these devices will draw from the 12v specifically. The CPU isn't hard, since it draws all its power at 12v: 65W/12v = 5.4A. Let's say 6.5A with imperfect efficiency, though I have no idea at what efficiency I should expect the CPU to operate. But what about the rest? In particular, I expect the onboard video to draw significant power at 12v, but I can't find how much.Can anyone help? And can anyone suggest a resource for finding this kind of information in the future? When I find power usage information at all, it's usually simply listed in watts, without specifying which rail it's drawn from.I did find the following two links in thread:http://www.extreme.outervision.com/PSUEnginehttp://web.aanet.com.au/SnooP/psucalc.phpBoth seem pretty useful (if a little out of date), but neither site seems to have good information on onboard video.\015

Answers :

17a @ 12v is only 200w\015\012
\015\012surprisingly, it will power the system that you have specified though. you should be running near 180w or at 90% capacity. this is really efficient and leaves a little room for upgrade down the road.\015\012
\015\012http://extreme.outervision.com/psucalculatorlite.jsp\015\012is really your best bet. you were wrong in stating that their information is out of date however. they keep this site pretty up-to-date, just not very organized. you just have to look really hard for what you have sometimes. all of the parts aren't always in alphabetical order as it may appear!
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