[mythtv-users] Help with new Video Card (power supply requirements)

Raymond Wagner raymond at wagnerrp.com
Fri Mar 12 20:59:26 UTC 2010


On 3/12/2010 15:19, Paulin wrote:
> Anyway I was getting ready to install it and one of the requirements 
> on the box says minimum 450W power supply.

That card only requires ~50W for itself.  Unless you have a rather high 
end machine (or an old Pentium 4), don't expect the rest of frontend 
hardware to pull more than 100W.  If you're running a backend as well, 
tack on maybe 5-10W for each tuner, and 20-25W for hard drive spinup.

> So my question is my thinking correct, in that, I can't use this card 
> because my power supply is maxed at 300w.

Check the individual rails on the supply. Ideally, it should be able to 
provide nearly all that power on the 12V lines. Recent hardware uses 
primarily 12V, and older supplies tend to lack 12V power.


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