RE: Re: PC PSU

["Keith Doxey" <ukha@xxxxxxxxxxx>]

Hi Malcolm


>
> The difference in amps between the two PSUs is only marked on the
> 12v rail.
>
> They compare as:
>
> QTechnology   +3.3v (30a)  +5v (30a)  +12v (29a)

3.3 * 30 = 99W	5 * 30 = 150W  12 * 29= 348W

> Silentmaxx    +3.3v (29a)  +5v (36a)  +12v (19a)

3.3 * 29 = 95.7W (call it 96)  5 * 36 = 180


> I also note that their specs list Combined Maximum Output at +3.3v /
+5v.
> For the QTechnology it's 235w

99 + 150 = 249W so they cant both be fully loaded as this exceeds the 235W
maximum

> and for the Silentmaxx it's 276w.

96 + 180 = 276W so both these could be fully loaded.

> Given the above I'd almost think that +12v figure for the
> SilentMaxx unit is a typo and may be 29a too(?).
>

Depends on the total rating for the PSU.
You havent mentioned what they are but from above

Qtechnology = 235 (max for 3.3+5) + 348 = 583W

SilentMaxx = 276 (max for 3.3+5) + 228 = 504W (Assuming 19A @ 12V is
correct)
or	276 (max for 3.3+5) + 348 = 624W (If 29A @ 12V if a typo which I doubt)

>From searching I have found a page listing the SilentMaxx 503 so I
guess it
is 19A.

Regards

Keith