USB-C to HDMI/DisplayPort adapters, checked against real specs

An adapter converts one protocol into another in a single dedicated cable or dongle — USB-C to HDMI, USB-C to DisplayPort — rather than multiplying ports the way a hub does. 57 confirmed, almost entirely for notebooks (51); only 11 confirmed for Steam Deck, 3 for ROG Ally and 2 for Legion Go. That skew makes sense once you consider the use case: a handheld player reaching for extra ports usually wants a hub, not a single-purpose adapter with nothing else attached.

Multi-display adapters lose resolution per display, not just per port count. The Cable Matters 4K Quad Display USB-C MST Adapter (201399) hits 8K@60Hz only with a single monitor connected — plug in a second and each display drops to 4K@120Hz, three or four displays drop each to 4K@60Hz. The 8K figure on the box is real, but only ever applies to the single-display case.

macOS and iPadOS don't support MST (Multi-Stream Transport) for independent extended displays through adapters like the Plugable USBC-MSTH2 — the practical result on Apple hardware is one real extended display and a second display that just mirrors the first, regardless of the adapter's spec sheet.

One adapter names all three tracked handhelds directly. Plugable's own documentation for its USB-C to 2.5G Ethernet Adapter (USBC-E2500) states plainly: "Windows and Linux based hand-held consoles like the Steam Deck, ROG Ally, and Legion Go include drivers." On Steam Deck specifically, a separate Linux hot-plug bug is documented: connecting the network cable after boot, or too late in the boot sequence, can leave the link permanently undetected or stuck at 100Mbps until a reboot.

Every entry below links to its source and the exact confirmation it's based on. See the FAQ for how we verify this.