The JSAUX Upgraded Steam Deck Dock is JSAUX’s premium dock for the Steam Deck OLED era, distinguished from the company’s original dock by upgraded HDMI bandwidth that can deliver 4K@120Hz output — a meaningful upgrade for owners pairing the Deck with a 4K 120Hz display. This JSAUX Upgraded Dock review covers the port loadout, real-world refresh-rate behaviour, OLED/LCD nuances, install and the verdict.
JSAUX Upgraded Docking Station 4K@120Hz for Steam Deck OLED/ROG Ally X/Legion Go (S)/MSi Claw, 6-in-1 Steam Deck Dock with HDMI 2.1, Gigabit Ethernet, 3 USB 3.0, 100W Charge for Steam Deck LCD-HB0603
As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated.
JSAUX Upgraded Steam Deck Dock at a Glance
| Component | Specification |
|---|---|
| Compatibility | Steam Deck OLED & LCD, ROG Ally, Legion Go, USB-C laptops and tablets |
| Material | Aluminium-and-ABS housing with rubberised base |
| Port count | 6 total (1x HDMI 2.0, 3x USB-A 3.0, 1x Gigabit Ethernet, 1x USB-C PD passthrough) |
| Display output | HDMI 2.0 — up to 4K@120Hz with Steam Deck OLED; 4K@60Hz typical with LCD |
| Ethernet | Gigabit (RJ-45) |
| USB | 3x USB-A 3.0 (5Gbps) for keyboard, mouse, controller |
| Power passthrough | USB-C PD up to 100W (45W charges Deck at full speed) |
| Dimensions | approx 5.6 x 2.6 x 1.8 in / 142 x 66 x 46 mm |
| Approx price | around $50 |
Build Quality & Materials
JSAUX’s Upgraded Dock takes the form factor that made the company’s original Deck dock popular — a compact rectangular base into which the Deck slots vertically — and re-engineers the internals. The housing is a mix of aluminium and ABS plastic with a rubberised base that grips a desk firmly, and the curved cradle that holds the Deck is lined with a soft rubber strip to prevent grip-marks on the handheld’s body. Cable management is reasonable, with a captive short USB-C tether that connects the dock to the Deck’s top USB-C port. At around $50 it is built to the standard of a mid-tier dock — not as premium as Valve’s own first-party dock, but considerably cheaper and more featureful than the cheapest no-name alternatives. The Ethernet port is solidly seated; the HDMI port is firm enough for repeated reconnection. JSAUX backs the product with a 12-month warranty.
Functionality & Real-World Use
The headline feature is HDMI 2.0 bandwidth — and the critical detail buyers should understand is that 4K@120Hz output from a Steam Deck via this dock is achievable only with the Steam Deck OLED, not the LCD model. This is a Deck hardware limitation, not a JSAUX one: the OLED ships with a USB-C controller spec that supports DisplayPort 1.4 with appropriate signal rates, while the LCD model is capped at lower bandwidth. With the OLED, you can drive a 4K@120Hz TV or monitor cleanly via this dock, and the Deck’s GPU will of course still need DLSS-equivalent settings to maintain framerate in demanding games at that resolution — but the dock will not be the bottleneck. With an LCD Deck, expect 4K@60Hz or 1440p@120Hz from this same dock.
Beyond display, the dock delivers exactly what couch-gaming demands: three USB-A 3.0 ports (for a wired controller, wireless dongle and external storage), Gigabit Ethernet for stable online play, and a USB-C PD passthrough that charges the Deck at the full 45W while docked. The Ethernet port is the genuine differentiator for online competitive play, where Wi-Fi packet loss can be the difference between victory and rage-quit.
Compatibility with Steam Deck / ROG Ally / Legion Go
The dock is designed primarily for the Steam Deck — both LCD and OLED — and the physical cradle is sized for the Deck’s chassis. ROG Ally owners can use the dock by simply connecting the USB-C cable to the Ally without seating it in the cradle (the Ally is a different shape). The Lenovo Legion Go works similarly. For all three handhelds the dock provides the same port loadout; the 4K@120Hz capability via HDMI 2.0 also works with the ROG Ally (which has appropriate USB-C spec) and Legion Go. The dock also works with any USB-C laptop or tablet that supports DisplayPort Alt Mode, making it a useful general-purpose USB-C hub when not docking a handheld. For broader docking station options, see our UGREEN 9-in-1 dock review later in this guide.
Installation / Setup
No installation required — the dock is plug-and-play. Connect the bundled USB-C cable from the dock to the Steam Deck’s top USB-C port, connect HDMI to your TV or monitor, plug in any USB peripherals and the included USB-C PD charger, and you are done. The Deck automatically switches output to the connected display. SteamOS recognises external controllers, keyboards and Ethernet without configuration. For 4K@120Hz on the OLED, ensure your HDMI cable is rated HDMI 2.0 or higher (most modern HDMI cables are; if in doubt, use an Ultra High Speed HDMI cable). Initial setup takes under a minute.
What’s in the Box
The dock itself, a short captive USB-C cable, a quick start guide and warranty information. Notably absent: the USB-C power adapter — you provide your own (the Deck’s bundled 45W charger works perfectly, or use the JSAUX 45W charger reviewed elsewhere in this guide). HDMI cable is also not included; most users will have one. For a $50 dock this is fair — the dock itself is the value, and re-using existing accessories keeps the price down.
Verdict
At around $50, the JSAUX Upgraded Steam Deck Dock is the right choice for Steam Deck OLED owners who want to pair their handheld with a 4K@120Hz display, and a strong general-purpose dock for any Deck user. Build is solid, the port loadout is well-judged for couch gaming, and the Ethernet port adds genuine value for online play. The 4K@120Hz capability is OLED-only — LCD owners should weight that fact in their buying decision, and may prefer the cheaper JSAUX Original Dock if they will not benefit from the higher bandwidth. For broader handheld accessory options, see our best PC gaming controllers guide for controllers that pair well with docked play.
A practical perspective on the 4K@120Hz capability: in real-world use the Steam Deck’s GPU is the limiting factor for hitting 4K@120Hz framerates in modern games — even at the OLED’s higher bandwidth, you will not be running Cyberpunk 2077 at native 4K@120Hz. What 4K@120Hz output enables, more practically, is high-refresh gaming at lower internal resolutions (1080p or 1440p with FSR upscaling) on a 4K@120Hz TV, with the dock delivering the upscaled image at full refresh — and that combination genuinely looks excellent. The dock also enables 4K@60Hz from any Deck for content viewing (Steam Link to a desktop PC, Netflix, YouTube), and the higher bandwidth gives headroom for future Deck firmware updates or successor handhelds. For couch-gaming setups built around a modern 120Hz gaming TV, the Upgraded Dock is the dock to buy; for setups with a standard 4K@60Hz TV, the JSAUX Original Dock at $40 saves money and delivers the same functional result. The JSAUX 12-month warranty applies to both dock variants, so warranty-coverage is not a differentiator. For broader accessory pairings, the JSAUX 45W charger covered in this guide is the natural companion for power passthrough.
Frequently Asked Questions
Does the JSAUX Upgraded Dock really do 4K@120Hz with Steam Deck?
Yes, but only with the Steam Deck OLED. The OLED has the USB-C bandwidth needed for DisplayPort 1.4-class output that translates to 4K@120Hz over HDMI 2.0. The original Steam Deck LCD is capped at lower bandwidth and will deliver 4K@60Hz or 1440p@120Hz from this dock.
Is the JSAUX Upgraded Dock worth it over the JSAUX Original Dock?
For Steam Deck OLED owners with a 120Hz 4K TV or monitor, yes — the higher refresh-rate output is genuinely useful. For LCD owners, the gains are smaller and the cheaper Original Dock may be a better value.
Does the JSAUX Upgraded Dock charge the Steam Deck at full speed?
Yes. The USB-C PD passthrough supports up to 100W, and delivers the full 45W the Steam Deck draws — the same charge rate as the Deck’s wall charger.
Will the dock work with my ROG Ally or Legion Go?
Yes. Both the ROG Ally and Legion Go work with the dock via USB-C, although neither fits the physical Deck-shaped cradle. The 4K@120Hz output is supported on both.
More Steam Deck Reviews
- JSAUX Original Dock 4K@60Hz Review: Steam Deck Value
- JSAUX PC0104 ModCase Review: Steam Deck Protection
- JSAUX Matte Screen Protector Review: Steam Deck Anti-Glare
- UGREEN Steam Deck Dock 9-in-1 Review: 4K HDMI Gigabit
- Spigen Rugged Armor Review: Steam Deck Case LCD/OLED
- JSAUX Carrying Case Review: Steam Deck / ROG Ally Travel
- JSAUX 45W USB-C Charger Review: Steam Deck PD 3.0
- Anker Steam Deck Dock 6-in-1 Review: OLED / ROG Ally
Affiliate Disclosure: As an Amazon Associate, we earn from qualifying purchases. If you click a link and make a purchase, we may earn a small commission at no extra cost to you. Prices and availability are accurate as of publication and may change.
Related Articles
Looking for more on this topic? Browse the hand-picked guides below — each one applies the same scoring rubric used in this review.
