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84898
July 24th, 2011 21:00
Dell Optiplex 755 Desktop power supply replacement.
Hello,
I have a Dell Optiplex 755 that has a stock 280 watt psu, I would like to upgrade this to a 550 watt psu. I know the computer uses a smaller form factor psu and because of that I am having a hard time finding a replacement. Is there anyone who has done this, if so what was the model that fit?
I would love to hear any success stories.
Thank you in advance.
Michael
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speedstep
11 Legend
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47K Posts
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July 25th, 2011 05:00
The tower on the left is easy to do, the Desktop you need to shoehorn an aux power supply inside by removing the Optical drive. For the SFF and USFF this is completely Impossible. The other issue is that Full size video cards will not fit into that case so the point is moot.
Genuine Dell 280W Power Supply PSU for
Dimension C521 3100C and
Optiplex Small Desktop Systems
210L 330 740 755 760 GX520 GX620
and New Style GX280 Part/Model Numbers
NH429 MH596 P9550 F5114 U9087 X9072
N8374 NC912 MC638 KC672 M8803 K8965
L280P-01 D280P-00 H280P-00 AA24120L
SFF Power Supply Dell Part Number: RM117
Thermaltakeusa » Accessories » Drive Bay » Toughpower Power ...
William 1970
6 Posts
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July 16th, 2017 22:00
So in this situation any of the standard atx psu can be fit into Dell Optiplex 755 Desktop? Just need to remove optical drive bay?
Will the 550w PSU ATX 24 Pin output suitable for desktop form factor motherboard?
After modify the PSU into 550W output i can install any low profile graphic card such as Nvidia Quadro 2000 (62W) into the desktop? Just not over 75W power consumption?
Thanks.
William
speedstep
11 Legend
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47K Posts
1
July 17th, 2017 05:00
The drive bay Aux power supplies are NOT Standard.
http://support.thermaltakeusa.com/Product.aspx?C=1432&ID=1543
The aux power unit is IN ADDITION to the main power supply not replacing it. Desktop units DO NOT FIT anything other than the proprietary Dell power supply. Standard EPS NOT ATX power supply will work. Requires 80 percent efficient EPS12v PFC power supply. ATX is 70 percent efficient at best. ATX is a standard from 1990.