The HP 8653 features a single slot for dedicated graphics cards. It is compatible with modern GPUs like the RTX 30-series , provided the power supply can handle the wattage. Users attempting to install older cards, such as a GTX 1080, may need to enable CSM/Legacy Support in the BIOS to get a display output, as the board is UEFI-only by default. Connectivity and Customization
This is a major stumbling block for modern tinkerers. The HP 8653 uses , not the more common DDR2 of later 775 boards. You are looking for: hp 8653 motherboard