JSAUX 6-in-1 Dock vs the First-Party Dock: Ports, Price, and Fit

The dock question comes down to a clean trade that the marketing on both sides muddies: the third-party JSAUX 6-in-1 (HB0603) undercuts the official Steam Deck dock on price while beating it on two real specs, and the official dock answers back with one output the JSAUX lacks and the assurance of first-party fit. Neither adds a single frame to your games — a dock is ports, not performance — so this is entirely a contest of output quality, power, connectivity, and peace of mind. Here is how the two actually differ once you strip the branding away.

Side by side

Video output: higher refresh vs DisplayPort

The two docks split the video question rather than one winning it. The JSAUX offers HDMI 2.1 at 4K@120Hz, double the refresh ceiling of the official dock's HDMI 2.0 at 4K@60Hz — useful for high-refresh output at 1080p or 1440p, which is where these chips can actually push frames, not for 4K120 gaming they cannot render. The official dock counters with a DisplayPort 1.4 output the JSAUX omits entirely, which matters if you drive a high-refresh monitor over DisplayPort or want the cleaner handshake DisplayPort often provides with PC monitors. For a TV, the JSAUX's HDMI 2.1 is the more flexible port; for a DisplayPort monitor, only the official dock has you covered. Know which display you are plugging into and the answer is usually obvious.

Power: 100W passthrough vs your PSU

This axis favors the JSAUX for anyone beyond a Steam Deck. The HB0603 provides 100W PD passthrough, comfortably charging even a power-hungry Windows handheld while you play. The official dock passes the wattage of whatever PSU you connect to it, which with the Deck's bundled 45W brick means 45W — plenty for a Deck, but short of what a ROG Ally in Turbo mode wants. If your dock will only ever feed a Steam Deck, 45W is sufficient and this difference is academic. If you own or might buy a higher-draw handheld, the JSAUX's 100W headroom is the more future-proof spec, and it is the reason a mixed-handheld household should lean third-party. Our best chargers and power banks for handhelds guide explains why the wattage threshold matters.

Connectivity and ports

On everyday connectivity the two are near-identical, which is worth saying plainly so you do not overweight it. Both provide Gigabit Ethernet and three USB-A ports — the JSAUX at USB 3.0, the official dock at USB 3.1 Gen 1, which are effectively the same real-world speed. For a controller, a wired network, and a drive or keyboard, either dock does the job without compromise. This is not where the decision lives, and any review that dwells on the port count is counting holes instead of grading watts and output version.

Compatibility and fit

Here the official dock earns its premium. It is designed and guaranteed for the Steam Deck, with Valve's assurance that firmware updates will not break the handshake — the closest thing to a plug-in-and-forget promise in this category. The JSAUX, by contrast, is built for broad compatibility across SteamOS and Windows handhelds, including the Steam Deck, ROG Ally X, and Legion Go S, which is a strength for a multi-device owner but means you are trusting tested third-party compatibility rather than a first-party guarantee. In practice JSAUX's track record here is strong and PC Gamer's coverage of its docks has been positive, but the risk profiles genuinely differ: the official dock is the safest bet for a Deck-only purist, and the JSAUX is the versatile bet for everyone else.

Price

The gap is real and one-directional. The JSAUX lands at $49.99 quoted at analysis (August 2026), the official dock around $79 — so the third-party option is meaningfully cheaper while offering higher HDMI refresh and more passthrough power. You are paying the official dock's premium for DisplayPort and first-party assurance, not for a better everyday experience. For most buyers, the value math points one way. You can check current JSAUX pricing on the JSAUX 6-in-1 Dock listing.

The performance caveat both share

Before the verdict, the point that overrides every spec on both docks: neither one makes your games run faster. A dock changes where the picture goes and how the device is powered, not how much horsepower draws the frame. Docked to a big TV, your handheld still runs on its handheld chip and its handheld power envelope, and asking it to push a larger output resolution can make it slower, not faster. Set the output to 1080p, or 1440p at most, to keep frame rates playable, and treat either dock's 4K figure as headroom for the desktop and video rather than a gaming promise. This is true of the official dock and the JSAUX equally, and any dock marketed as a performance upgrade is selling a spec that does nothing for your games.

Build, stand, and everyday use

Both docks are built to sit on a desk and handle daily plugging and unplugging, and neither has a meaningful reliability edge in normal use. The official dock is a purpose-built stand that cradles a Steam Deck at a viewing angle, which is tidy if the Deck is your only device. The JSAUX HB0603 is a more universal block designed to serve several handhelds, so it trades a Deck-perfect cradle for broader fit. If your dock lives on a shelf and you connect over a cable, even that distinction fades. The practical difference between them remains the ports and power on the back — HDMI version, passthrough wattage, and DisplayPort — not the shell they live in, which is where any honest dock comparison should keep its focus.

The verdict: an honest split

Buy the JSAUX 6-in-1 (HB0603) if you want the best value, higher HDMI refresh, 100W passthrough that suits any handheld, and multi-device compatibility — which describes most buyers, and especially anyone who owns more than one handheld. Buy the official Steam Deck dock if you specifically need its DisplayPort 1.4 output, or if you are a Deck-only owner who values first-party firmware assurance above price and features and simply never wants to think about a handshake. Both do the core job — clean output, power, Ethernet, and USB — and neither adds performance. For where each sits among all the options, see our best docks for handhelds guide, and our dock and TV output walkthrough covers the full living-room setup.

Specs are marketing; the verdict is that the JSAUX wins on the specs most people use — refresh, watts, and price — while the official dock wins on DisplayPort and the quiet confidence of first-party fit, so buy the JSAUX unless you can name the specific reason you need Valve's.