Solved Closed

Power Supplies that work with a Dell Optiplex 755???

I need to know some power supplies that work with my Dell Optiplex 755. The one that came with the computer is only a 108w and i want a bigger one around the 500w range. Any suggestions????
Thanks
29 answers Last reply Best Answer
More about power supplies work dell optiplex 755
  1. Which of these 755s is yours?
  2. the 2nd biggest one
  3. clutchc said:
    Which of these 755s is yours?



    the 2nd biggest one
  4. The Dell OptiPlex 755 Desktop Computer uses a custom form factor power supply made specifically for that computer case design. You won't be able to find any off-the-shelf power supplies that you can replace it with.
  5. +1^
    If you are planning on upgrading the PSU for adding a more powerful gfx card, the PCIe x16 slot in slim lines is usually limited to 35W rather than the normal 75W. And no slim line PSU is bigger than 350W that I am aware of. You will be better off to save up for a new build if you want to play current gen games at 1080p.

    @ Ko888
    Would that system use a conventional TFX size PSU? Something like this: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151115
  6. clutchc said:
    +1^
    If you are planning on upgrading the PSU for adding a more powerful gfx card, the PCIe x16 slot in slim lines is usually limited to 35W rather than the normal 75W. And no slim line PSU is bigger than 350W that I am aware of. You will be better off to save up for a new build if you want to play current gen games at 1080p.

    @ Ko888
    Would that system use a conventional TFX size PSU? Something like this: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151115


    i play skyrim in 1280x1024 with my current setup. but i was just wanting a bigger PSU just incase i want a bigger graphics card
  7. It's a custom form factor. Note the L shape. The notch taken out of the back of the PSU is where the part of the optical drive bay occupies some space.

  8. Are you sure it is only 108W? That would be the smallest PSU I've seen on a conventional PC. Dell states that the PSUs on thier 755 line is as follows:
    Mini-tower: 305W
    Desktop: 280W
    Small Form Factor: 275W
    Ultra Small Form Factor: 220W

    http://www.dell.com/us/dfb/p/optiplex-755/pd
  9. clutchc said:
    Are you sure it is only 108W? That would be the smallest PSU I've seen on a conventional PC. Dell states that the PSUs on thier 755 line is as follows:
    Mini-tower: 305W
    Desktop: 280W
    Small Form Factor: 275W
    Ultra Small Form Factor: 220W

    http://www.dell.com/us/dfb/p/optiplex-755/pd


    yeah thats what the tag on it says.
  10. ko888 said:
    It's a custom form factor. Note the L shape. The notch taken out of the back of the PSU is where the part of the optical drive bay occupies some space.


    Ah. Yes. I was thinking it was a typical TFX. When I looked up Dell Optiplex 755 PSU, I came across a std TFX. But it probably wasn't for the Desktop model. That PC was made in 4 different variations. Good to know.
  11. FunkyPunk587 said:
    clutchc said:
    Are you sure it is only 108W? That would be the smallest PSU I've seen on a conventional PC. Dell states that the PSUs on thier 755 line is as follows:
    Mini-tower: 305W
    Desktop: 280W
    Small Form Factor: 275W
    Ultra Small Form Factor: 220W

    http://www.dell.com/us/dfb/p/optiplex-755/pd


    yeah thats what the tag on it says.


    Is the PSU like the one Ko888 shows?
  12. clutchc said:
    FunkyPunk587 said:
    clutchc said:
    Are you sure it is only 108W? That would be the smallest PSU I've seen on a conventional PC. Dell states that the PSUs on thier 755 line is as follows:
    Mini-tower: 305W
    Desktop: 280W
    Small Form Factor: 275W
    Ultra Small Form Factor: 220W

    http://www.dell.com/us/dfb/p/optiplex-755/pd


    yeah thats what the tag on it says.


    Is the PSU like the one Ko888 shows?


    yes
  13. Start fresh with a new build. I can imagine you have a hard time playing skyrim with your current pc...
  14. FunkyPunk587 said:


    yes


    Then I'm stumped as to why it is only 108W. :??:
  15. http://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

    Page 6 shows the power supply size and page 28 shows the Desktop Tower (that lays flat) is the one with the 108w which is the combined Max Combined +3.3v / +5.0v Power.

    Upgrading the power supply or video card isn't looking good.
  16. clutchc said:
    FunkyPunk587 said:


    yes


    Then I'm stumped as to why it is only 108W. :??:


    yeah i know i dont get it. you would think it would be bigger
  17. RazerZ said:
    Start fresh with a new build. I can imagine you have a hard time playing skyrim with your current pc...


    actually no it runs 40-50 fps no problems and is playing on high settings
  18. Best answer
    Pondering said:
    http://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

    Page 6 shows the power supply size and page 28 shows the Desktop Tower (that lays flat) is the one with the 108w which is the combined Max Combined +3.3v / +5.0v Power.

    Upgrading the power supply isn't looking good.


    Thanks for the link. Page 28 in that link shows the desktop has a 280W PSU. I think the OP was confusing the 108W with total wattage. Nevertheless, a single 16A +12V rail won't be enough for a decent upgrade.
  19. clutchc said:
    Pondering said:
    http://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

    Page 6 shows the power supply size and page 28 shows the Desktop Tower (that lays flat) is the one with the 108w which is the combined Max Combined +3.3v / +5.0v Power.

    Upgrading the power supply isn't looking good.


    Thanks for the link. Page 28 in that link shows the desktop has a 280W PSU. I think the OP was confusing the 108W with total wattage. Nevertheless, a single 16A +12V rail won't be enough for a decent upgrade.


    so my computer has a 280W PSU???
  20. FunkyPunk587 said:


    so my computer has a 280W PSU???


    It appears so. Can you post a pic of the nameplate just to verify?
  21. The upper limit to that type of power supply is 300 Watts and even if you could squeeze in a 20 watts larger power, larger video cards won't fit.

    Someone on the dell forums said about about being able to squeeze in a non L shape power supply by removing the optical disk drive, but I am not even sure what form factor the L shaped power supply is.
  22. If it had a 2nd 16A +12V rail, I'd suggest the low profile Galaxy GTX 750 Ti. But a single 16A rail won't do it.
  23. clutchc said:
    FunkyPunk587 said:


    so my computer has a 280W PSU???


    It appears so. Can you post a pic of the nameplate just to verify?


    file:///C:/Users/User/Desktop/IMG_3131.JPG
    sorry its not the best pic
  24. clutchc said:
    If it had a 2nd 16A +12V rail, I'd suggest the low profile Galaxy GTX 750 Ti. But a single 16A rail won't do it.


    im happy with my radeon 5450 for right now
  25. A pic on your computer won't transfer. It has to be on a server. But no sense bothering now. It looks like you have about the most gfx card you can safely use with that PC/PSU.
  26. clutchc said:
    A pic on your computer won't transfer. It has to be on a server. But no sense bothering now. It looks like you have about the most gfx card you can safely use with that PC/PSU.


    okay. thanks for the help!
  27. clutchc said:
    Which of these 755s is yours?


    I know I'm in the wrong place to ask this ...but since I'm here I will :P
    Can I upgrade my bios for my desktop? and how? (biggest one) bc I want to install the fastest processor Intel Core 2 Extreme QX9650 Quad-Core Processor, 3 GHz, 12M L2 Cache, 1333MHz FSB, LGA775 and I will change the power supply .:) (case has been modded)
  28. Use Dell support page for your PC. The BIOS updates (if available) should be offered there.
  29. Simple is a small case limited to psu choice so either make an open air case with simple youtube tutorials or pop on to amazon and pic yourself up a £25 gaming case and get a new psu that will fit and transfer from optiplex to new case!
Ask a new question

Read More

Power Supplies Optiplex Dell Components