: One of the most famous "plot twists" for owners was the BIOS limitation. Many versions of the H61H2-AD shipped with Legacy BIOS rather than UEFI, which often prevented users from upgrading to newer graphics cards like the Nvidia GT 1030 or RX 480.
The PCIe x16 slot is version 2.0. A modern GPU will work fine here (maybe a 5% performance loss), but avoid cards that require external power, as the proprietary PSU likely lacks PCIe cables. acer h61h2-ad