[mythtv-users] Should I Upgrade Frontend from AMD 3200+ to AMD X2 3800+ (DualCore) ?

[John Drescher]

> 2009/2/15 Krzysztof Adamski <k at adamski.org>:
>> So to put it in a simple terms :-)
>> If the max draw at the KAW shows is 220W and we us a 80+ PSU that has a
>> 99% power correcting, then (220W + 10% safety) for 242W at 80%
>> efficiency gives us a 290W, so a 300W 80+ PSU should be more then
>> enough, right?
>
> If you want to be safe, simply put a higher rated PSU, a 550W PSU
> won't draw more power than a 350W one if that's all what the system
> need.
That is not necessarily true. Less efficient power supplies (not 80+
rated) generally are only efficient near the maximum load. So its
possible that the 550W one will waste more power at 150W than the 350W
one.

John