| Source | Reliability | Free | Best For | | :--- | :--- | :--- | :--- | | | High | Yes | Direct Dell-signed drivers | | Intel’s Official Site | High | Yes | Intel 82579LM chips | | Realtek’s Official Site | High | Yes | Realtek RTL8111E chips | | Snappy Driver Installer (SDI) | Medium | Yes | Offline driver packs (for post-install) |
Downloading and Installing Dell OptiPlex 790 Network Drivers for Windows 7 | Source | Reliability | Free | Best
did not always come with internal Wi-Fi, but if yours has a wireless card installed, the most common official driver is: Dell Wireless 1520 Service Tag: For the most accurate results, enter
If the official Dell links are down, download (not the "R710" version) from a trusted site like sdi-tool.org on another PC, copy it via USB, and run it on the OptiPlex. It will automatically find and install the correct network driver for free. copy it via USB
If the OptiPlex has no internet, download the driver on another PC and transfer it via USB. Service Tag: For the most accurate results, enter your Service Tag
Find the for your specific 32-bit or 64-bit version. Troubleshoot installation errors .