What are the display output capabilities of this mini PC, and what resolutions are supported?

It has three video outputs: 1 x HDMI 2.1 FRL, 1 x DisplayPort 1.4, and 1 x USB4. The description states they support up to 8K at 60Hz, with HDMI supporting 4K at 120Hz and DisplayPort/USB4 supporting 4K at 144Hz.

Does the MINISFORUM X1 Lite-255 support adding an external graphics card, and how is it connected?

Yes. It includes an OCuLink port for connecting an external GPU. The description says OCuLink uses PCIe 4.0 x4 bandwidth and the adapter is included. It is noted as non-hot-swappable and uses one M.2 slot.

Questions & Answers: MINISFORUM X1 Lite-255 Mini PC AMD Ryzen 7 255 (8C/16T, Up to 4.9GHz) Barebone Without RAM/SSD/OS, USB4/HDMI/DP 8K Video Output, OCuLink, 2.5G LAN, Wi-Fi6E/BT5.2, Radeon 780M Graphics Micro Computer

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MINISFORUM X1 Lite-255 Mini PC AMD Ryzen 7 255 (8C/16T, Up to 4.9GHz) Barebone Without RAM/SSD/OS, USB4/HDMI/DP 8K Video Output, OCuLink, 2.5G LAN, Wi-Fi6E/BT5.2, Radeon 780M Graphics Micro Computer

[Unparalleled Processing Performance] MINISFORUM X1 Lite-255 Mini PC has AMD Ryzen 7 255 (8C/16T, Zen4, up to 4.9GHz) and AMD Radeon 780M graphics (12 core 2600MHz), performance close to GTX 1650, smooth for heavy tasks and multitasking.
[Expandable Storage] Dual DDR5 SO-DIMM (up to 96GB) and dual M.2 2280 PCIe 4.0x4 (up to 8TB total), for fast data processing and file transfers.
[OCuLink Support] OCuLink port (PCIe 4.0 x4 = 64 Gbps, faster than TB4/USB4) allows external GPU for gaming/AI. Non-hot-swappable, uses one M.2 slot. Adapter included.
[Triple Video Outputs] 1x HDMI 2.1 FRL (8K@60Hz/4K@120Hz), 1x DP 1.4 (8K@60Hz/4K@144Hz), 1x USB4 (8K@60Hz/4K@144Hz), supports multi-monitor for office, design, entertainment.
[Full-function USB4 Port] 40Gbps transfer, 65-100W PD-IN charging host + 15W output to peripherals, flexible power.
[2.5Gbps LAN & WiFi 6E & BT5.2] 2.5GbE, Wi-Fi 6E, Bluetooth 5.2 for low-latency stable connection and faster network speed.

$308^.99 –