PSU problem on Dell

Forum CPU & Components : Other Components PSU problem on Dell

I am currently running a Dell Dimension 4100 with the following specs:

PIII 866 processor
Dell branded motherboard - Intel 815E chipset
Dell 200 Watt PSU
2 sticks 256 MB pc 133 RAM
10GB WD HD
30GB Seagate HD
DVD-ROM
CD-RW
Geforce 3 Ti500 64MB

With this configuration, the computer runs perfectly,

However, I recently bought a Radeon 9500pro and once adding the Radeon 9500pro, I think the power supply is insufficient.

So I went and bought an Enermax 350 Watt PSU, however when I tried to install the new Enermax (with my old config, no Radeon 9500pro yet), the computer will not power on. When I plug it in and flip the power switch on the PSU, it makes a high pitched noise, the fans do not spin and I cannot power the computer on. The rest of the computer is fine because it still runs when I plug the old 200W PSU back in.

Any suggestions as to what the problem may be? There is no connector on my motherboard for the fan line from the Enermax, could that be the problem? Or could there be a problem simply with the motherboard being that it is Dell proprietary?

Thanks in advance.
Alan

Reply to corinalbria

dell uses a proprietary pinout for their mobos. a regular psu wont work. thats what you get for buying a dell <snicker> j/k

my computer is so fast, it completes an endless loop in less than 4 seconds!

Reply to jihiggs

Dells use completely different pinouts for their power supplies, and even though the connectors are compatible, you must never, ever plug a standard ATX power supply into a Dell motherboard or a standard ATX motherboard into a Dell power supply. Compare Dell to ATX below. Most likely, the standard ATX supply shorted out and shut off before any damage was done (notice that some standard ATX voltage lines would have been grounded by the Dell motherboard), but the 6-pin ATX connector could have zapped some +3.3V chips by feeding them +5V. There are adapter cables available to allow standard ATX power supplies to be plugged into Dell motherboards.

Dell pinouts:

6-pin Dell connector:

1. ground (black)
2. ground
3. ground
4. +3.3V (blue/white - nonstandard color)
5. +3.3V
6. +3.3V

20-pin Dell connector:

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

11. Power_On (grey - nonstandard color)
12. ground
13. ground
14. ground
15. -5V (white
16. +5V
17. +5V
18. +5V
19. blank
20. +5V

Pinouts for standard ATX power supply:

6-pin ATX connector:

1. ground (black)
2. ground
3. ground
4. +3.3V (orange, but sometimes brown)
5. +3.3V
6. +5V (red)

20-pin standard ATX connector:

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

11. +3.3V
12. -12V (blue)
13. ground
14. Power_On (green)
15. ground
16. ground
17. ground
18. -5V (white)
19. +5V
20. +5V

Reply to jamarno

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