Hi Douglas,
its me again... :-)
Am 2008-02-22 11:51:59, schrieb Douglas A. Tutty:
> DC output Peak Continuity Max Power
> =================================================
> +3.3 V 25A 20A }
> } 166 W
> + 5 V 25A 20A }
> -------------------------------------------------
> +12V (bus 1) 19.5A 16A }
> +12V (bus 2) 19.5A 14A } 465 W
> +12V (bus 3) 19 A 8A }
> -------------------------------------------------
> -12V 0.8A 0.5A 6W
> -------------------------------------------------
> 5Vsb 3.5A 3.0A 15W
> =================================================
>
>
> So the only trick for your design is what plugs from the PSU are on
> which 12V bus. Here's the breakdown:
>
> Motherboard connector, 12V is from bus 1.
>
> 4-pin 12V power connector is on bus 2
>
> 8 pin 12V power connector: pins 1 & 2 are from bus 1, pins 3 & 4 from
> bus 2.
>
> One PCIe 6 pin connector is on bus 1, the other PCIe 6 pin connector is
> on bus 3 (these are for one or two video cards that need the extra
> power)
>
> SATA conectors are on 12V bus 1
>
> PATA drive connectors are also on 12V bus 1
>
> All of these connectors use 18 AWG wire.
>
> Floppy connector 12V is also on bus 1 but uses 22 AWG wire.
>
> ---
>
> Analysis:
>
> Bus 1: 16A continuous, 19.5 A peak, is used for the MB connector, half
> of the 8-pin connector, one PCIe video connector, and all the drives.
OK, since ePCI2 is on Bus 3 and has 8A, stay 8A here too. The I asume,
you have one double SATA cable and ond double PATA cable for together 4
devices which are arround 3A together.
This mean we have ~5A for the Mainboard and the 8pin connector from
which I do not know, for what it is.
Hmm, my ATX-Connector has only 1 yellow 12V cable, so it can not be very
much amperes...
...but 4 red 5V cables which mean, I need for 4 SATA/PATA drives at
least 4A (DVD-Rom or DVD-Burner eating at least twice the energie as a
HDD) and it we have 16A om 5V for the MB, 8pin and ePCI
> Bus 2: 14A continuous, 19.5 A peak, is used for half of the 8-pin
> connector and the 4-pin connector
Never had a P4 and never used a 8pin connector, so Bus 2 is wasted...
> Bus 3: 8A continuous, 19A peak, is used for one PCI-e connector.
Hmmm have no second ePCI (not even a first one :-)
> Given the design of this PSU, I can't say how much amperage goes, e.g.
> only to the MB or for each drive. However, look at it this way.
>
> Bus 3 is 8A is only goes to one PCI-e.
>
> Bus 1 is 16 a and does most things including a PCI-e so if you figure
> that a PCI-e is 8A that leaves 8A for the MB and half the 8-pin
> connector, and all the drives.
Thanks, Greetings and nice Day
Michelle Konzack
--
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