Even with the best driver, issues can arise. Here is how to fix them:
The OptiPlex 790’s Intel 82579LM is a rock-solid Gigabit controller. Dell’s final driver for Windows 7 (2015–2017) is stable and reaches full 1 Gbps speeds. Even with the best driver, issues can arise
that contains all necessary drivers for the 790 in one compressed file. Alternative for Wireless : If your 790 has an optional Wi-Fi card, you may need the Realtek 802.11n driver often found in these units. Step-by-Step Installation Guide Dell Command | Deploy Driver Pack for Optiplex 790 Win 7 Even with the best driver