OptiPlex 755 – Windows 7 and 10

Form Factors

Minitower, Desktop, SFF, USFF

System Upgrades

Ensure you reference your service manual before carrying out upgrades:

The most recommended upgrade for this system is a Solid State Drive, here is my affiliate link to Crucial here. If purchasing a SSD or Memory Upgrade please use these links as I will get a tiny bit of commission which will help fund my guides

SSD Drive Upgrade

Memory Upgrade

This system supports 8 GB of RAM 2×(2×2 GB Modules) or 4 GB RAM (2×2 GB Modules) for the USFF. Note the 32 Bit OS maxes out at 4 GB RAM. This can also be purchased using the affiliate link above.

Graphics Card

Please ask on the Dell Community Forums for the latest recommendation for Graphics Cards. Ensure to include your form factor when asking for a Graphics Card Upgrade Recommendation.

Operating System

It is recommended to install Windows 10 on this system see Windows OEM FAQs and Downloads. Note the Windows Vista OEM or Windows XP Product Key won't be compatible with Windows 10 Installation Media however you can run Windows 10 Unlicensed. Windows 10 will have most of the system drivers required inbuilt however you can install the Windows 7 Drivers if you have any unknown Devices in the Device Manager.

Drivers and Downloads for Windows 7

Legacy BIOS

Do not power off your system during this update. A failed BIOS Update can make your computer unusable.

System Utilities (Windows 7 Only)

Chipset (Windows 7 and Windows 10)

The last 2 Chipset Drivers are the only drivers required for Windows 10.

Video (Windows 7 Only)

There are two variants of Video Cards installed by default on this model. The onboard Intel Graphics or a Dedicated ATI (now AMD) Graphics Card.

Communications (Windows 7 Only)

Not all systems have a modem. If the Driver fails to install, there is no need to try and install the rest in this category.

Ethernet (Windows 7 Only)

This has Broadcom and Intel variants. The driver is inbuilt for the Broadcom NIC. An older version of the Intel driver is also inbuilt.

Audio (Windows 7 Only)

Check the Architecture of the link and then select download.

These are available as .cab files. See instructions toinstall drivers via the Device Manager.

Card Reader

The Card Reader was optional and most of these units don't have a card reader.


11 thoughts on “OptiPlex 755 – Windows 7 and 10

  1. Great post, but I need help on the graphics driver since the AMD autodetect cannot identify my video card. TIA

  2. Everything in my Dell Optiplex 755 works with Win10, except for the Analog Devices audio.
    I've tried several different driver versions; all of those worked with Windows7.
    Anyone more success with Win10, other than installing another soundcard?

      1. I have a dell optiplex 755 and i had changed hard disk of 320 Gb, but i can´t install w7 o w10, when i am trying install the OS, don´t accept the drivers AHCI, i will like if possible than somebody give one image ISO for my pc. Thanks.

      2. Win7 and Win10 are far more up to date than that system and have the SATA preinstallation drivers required inbuilt.


    1. Windows 7 Reaches End of Life in less than a month. As a consequence it looks like Intel have removed their Windows 7 Downloads.

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