Additional PSU

  • Thread starter Thread starter dietwater
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dietwater

I have a Dell Demension 9200 with a measly 375W PSU. Is there anyway I
can add another PSU to power some of the peripherals like raid-5 HDs,
etc? I'm not looking for hot swap/redundancy, just some addional juice.

Thanks.
 
I have a Dell Demension 9200 with a measly 375W PSU. Is there anyway I
can add another PSU to power some of the peripherals like raid-5 HDs,
etc? I'm not looking for hot swap/redundancy, just some addional juice.

Thanks.
Click to expand...
Dell under rates their power supplies. They are rated for continuous
output, not peak as many cheapos do. The 9200 should be fine for
anything you can fit inside.
 
I have a Dell Demension 9200 with a measly 375W PSU. Is there anyway I
can add another PSU to power some of the peripherals like raid-5 HDs,
etc? I'm not looking for hot swap/redundancy, just some addional juice.
Click to expand...

Here's a discussion thread about doing just that:

www.ocforums.com/showthread.php?t=88976

WIth ATX PSUs you don't need relays or anything, just connect the
grounds together (bolt both PSUs to the same metal case) and tie the
Power-On wires together. On standard ATX PSUs this is the green wire
that's between two black ground wires, but on proprietary Dells that
have only one orange wire on the 20-pin mobo connector, it's the grey
wire on pin 11. If your Dell's 20-pin connector has a green wire and
at least three orange wires, then it's standard ATX style. If you have
one PSU of each type, then it's still OK to tie the green Power-On wire
of the standard ATX to the grey Power-On wire of the proprietary Dell.


20-pin Dell connector Standard 20-pin ATX
connector

1. +5V (red) 1. +3.3V (orange or
brown)
2. ground (black) 2. +3.3V
3. +5V 3. ground (black)
4. ground 4. +5V (red)
5. Power_Good status (orange, nonstandard) 5. ground
6. +5V Standby (purple) 6. +5V
7. +12V (yellow) 7. ground
8. -12V (blue) 8. Power_Good status
(grey)
9. ground 9. +5V Standby (purple)
10. ground 10. +12V (yellow)

11. Power_On (grey - nonstandard) 11. +3.3V
12. ground 12. -12V (blue)
13. ground 13. ground
14. ground 14. Power_On (green)
15. -5V (white) 15. ground
16. +5V 16. ground
17. +5V 17. ground
18. +5V 18. -5V (white)
19. blank 19. +5V
20. +5V 20. +5V
 
I have a Dell Demension 9200 with a measly 375W PSU. Is there anyway I
can add another PSU to power some of the peripherals like raid-5 HDs,
etc? I'm not looking for hot swap/redundancy, just some addional juice.

Thanks.
Click to expand...


Dell PSU are usually rated pretty conservatively, you might
be fine with the current PSU (but you didn't tell us all the
major parts in a Dimension 9200).

Yes you could add a PSU, but where? Is there room in the
case? I'd expect not so it'd be external and you'd probably
want to tie it's PS-On line to the one on the current PSU so
this secondary PSU turns on automatically with the rest of
the system. Also you'd want it to have a common ground,
either a good connection to a ground on the chassis or tied
to the main PSU ground (one of the leads) as well.
 
Great info, thanks!
Here's a discussion thread about doing just that:

www.ocforums.com/showthread.php?t=88976

WIth ATX PSUs you don't need relays or anything, just connect the
grounds together (bolt both PSUs to the same metal case) and tie the
Power-On wires together. On standard ATX PSUs this is the green wire
that's between two black ground wires, but on proprietary Dells that
have only one orange wire on the 20-pin mobo connector, it's the grey
wire on pin 11. If your Dell's 20-pin connector has a green wire and
at least three orange wires, then it's standard ATX style. If you have
one PSU of each type, then it's still OK to tie the green Power-On wire
of the standard ATX to the grey Power-On wire of the proprietary Dell.


20-pin Dell connector Standard 20-pin ATX
connector

1. +5V (red) 1. +3.3V (orange or
brown)
2. ground (black) 2. +3.3V
3. +5V 3. ground (black)
4. ground 4. +5V (red)
5. Power_Good status (orange, nonstandard) 5. ground
6. +5V Standby (purple) 6. +5V
7. +12V (yellow) 7. ground
8. -12V (blue) 8. Power_Good status
(grey)
9. ground 9. +5V Standby (purple)
10. ground 10. +12V (yellow)

11. Power_On (grey - nonstandard) 11. +3.3V
12. ground 12. -12V (blue)
13. ground 13. ground
14. ground 14. Power_On (green)
15. -5V (white) 15. ground
16. +5V 16. ground
17. +5V 17. ground
18. +5V 18. -5V (white)
19. blank 19. +5V
20. +5V 20. +5V
Click to expand...
 
Dell uses PROPRIETARY PSU's. So you cannot just go and pick up a standard
PSU at the store.
 
DaveW said:
Dell uses PROPRIETARY PSU's. So you cannot just go and pick up a standard
PSU at the store.
Click to expand...
That is no longer true. Dell hasn't used them for several years now. For
sure Dimensions with P4's or later are standard.
 
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