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RE: Re: PC PSU
- Subject: RE: Re: PC PSU
- From: "Keith Doxey" <ukha@xxxxxxxxxxx>
- Date: Mon, 27 Dec 2004 17:02:42 -0000
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
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