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Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Razer’s USB 4 Dock (model family RC21-0228) is a 14-port hub designed to connect a laptop to displays, peripherals, wired networking and storage through one host cable. Razer advertises up to 40 Gbps USB 4 bandwidth, one display at up to 4K/120 Hz or two at up to 4K/60 Hz each, and laptop charging up to 100 W peak. Those are manufacturer specifications; the display mode you get depends on both the dock and your computer’s video-output support.
What is the Razer USB 4 Dock?
Razer announced the RC21-0228 on November 14, 2024, positioning it as a single-cable dock for gaming and work PCs. Its upstream connection uses USB 4, with advertised bandwidth up to 40 Gbps. That is the connection’s rated maximum, not a promise that every attached device will transfer data at that speed. Razer’s launch announcement describes the dock’s intended role; the product page lists its current features and specifications.
What ports does it have?
Razer calls the dock a 14-port design. The listed connections include display outputs, Ethernet, card readers, audio, USB-A and USB-C, plus a dedicated port for 2.4 GHz wireless dongles. The power input and included power adapter are not additional data ports.
| Connection | Razer-listed capability |
|---|---|
| HDMI | HDMI 2.1 |
| DisplayPort | DisplayPort 1.4 |
| Ethernet | Gigabit Ethernet |
| SD and microSD | UHS-II card readers |
| USB-C | One USB-C 3.2 Gen 2 port; up to 20 W battery charging |
| USB-A | One USB-A 3.2 Gen 2 port, up to 10 Gbps; two USB-A 3.2 Gen 1 ports, up to 5 Gbps each; and one USB-A 2.0 port |
| Wireless accessory port | Dedicated USB port for 2.4 GHz dongles |
| Audio | 3.5 mm microphone/headphone combo jack; Razer lists 7.1 surround support |
| Host connection | USB 4 upstream port, advertised up to 40 Gbps |
Razer says the dedicated dongle port is intended to reduce wireless interference for connected gaming peripherals. That is the company’s stated rationale, not an independently verified radio-performance result. The company also lists an independent power button, allowing devices to charge from the dock without a PC connection.
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- ULTRA FAST USB 4 CONNECTIVITY — Discover the new USB standard for data transfer rates, display output support and device charging that is backward compatible with all the USB 2.0 & 3.0 devices
- 14 PORT DESIGN — From external HDDs and displays, to speakers and peripherals, free up PC ports and minimize cable clutter by running all devices through a single USB C connection
- DUAL MONITOR SUPPORT — Create a display setup that offers the best of both worlds; experience stunning visuals on a primary display up to 4K 120 Hz and still have the space needed to multitask on a secondary monitor
- ALWAYS ON LAPTOP CHARGING & POWER DELIVERY — Enjoy 100 W of charging for a laptop and connected devices with the included 180 W adapter; a dedicated power button enables powering down the dock for energy efficiency
- DURABLE & LIGHTWEIGHT ALL METAL CASING — On top of its compact footprint and portable design, this dock is resistant to everyday wear and tear and ensures minimal heat buildup, making it ideal for extended use
Can it run two 4K monitors?
Razer specifies one display at up to 4K/120 Hz, or two displays at up to 4K/60 Hz each. These are the dock’s advertised maximum modes, not guaranteed outcomes for every laptop and monitor combination. Your host computer must support the relevant video output over its USB-C/USB 4 connection, and the displays and cables must support the target resolution and refresh rate.
Before relying on a particular setup, check the laptop manufacturer’s specifications for its USB-C port’s video-output capability and confirm the intended display mode for your operating system and screens. The dock’s HDMI 2.1 and DisplayPort 1.4 connectors alone do not establish that any USB-C laptop can drive two 4K displays at 60 Hz.
Rank #2
- ULTRA FAST USB 4 CONNECTIVITY — Discover the new USB standard for data transfer rates, display output support and device charging that is backward compatible with all the USB 2.0 & 3.0 devices
- 14 PORT DESIGN — From external HDDs and displays, to speakers and peripherals, free up PC ports and minimize cable clutter by running all devices through a single USB C connection
- DUAL MONITOR SUPPORT — Create a display setup that offers the best of both worlds; experience stunning visuals on a primary display up to 4K 120 Hz and still have the space needed to multitask on a secondary monitor
- ALWAYS ON LAPTOP CHARGING & POWER DELIVERY — Enjoy 100 W of charging for a laptop and connected devices with the included 180 W adapter; a dedicated power button enables powering down the dock for energy efficiency
- DURABLE & LIGHTWEIGHT ALL METAL CASING — On top of its compact footprint and portable design, this dock is resistant to everyday wear and tear and ensures minimal heat buildup, making it ideal for extended use
Charging: what do 100 W and 180 W mean?
The dock includes a 180 W power adapter. Razer lists laptop charging up to 100 W peak and 96 W sustained. These figures describe the dock’s stated power delivery to the host laptop; actual charging depends on the laptop and how it uses power. The separate USB-C port is listed for up to 20 W battery charging for connected devices.
Which computers and devices are compatible?
Razer’s product FAQ says the dock supports Windows and macOS systems with USB 4 or USB 3 over USB Type-C and broadly names PCs, MacBooks, iPads and Chromebooks. That broad compatibility statement does not mean every listed device supports every dock feature. In particular, confirm the exact model’s USB protocol and video-output support if you need an external display or a specific multi-monitor mode. The Razer product FAQ is the manufacturer’s compatibility reference.
Rank #3
- THUNDERBOLT 4 CERTIFIED — Fully compatible with Thunderbolt 4 devices providing 40 Gbps connections, USB4 compliance, laptop charging via one port, and ability to wake the laptop from sleep using peripherals connected to the dock
- 10 PORTS IN ONE — Packed with 4x Thunderbolt 4 ports (1 Upstream and 3 Downstream), Gigabit Ethernet, 3.5 mm audio combo jack, UHS-II SD card slot (SD 4.0) and 3x USB-A 3.2 Gen 2 ports to connect a plethora of devices
- DUAL MONITOR SUPPORT — Access up to 2x 4K 120Hz displays (Intel Mac), 1x 5K 60Hz display (M1 Mac) with 1 Thunderbolt 4 cable
- FUTURE-PROOF AND BACKWARD-COMPATIBLE — Compatible with legacy Thunderbolt devices and USB4 compliant, the Razer Thunderbolt 4 Dock Chroma supports devices past and present to give the flexibility to create the dream setup
- PASS-THROUGH CHARGING — Keep the USB-C powered laptop topped off at all times using the dock’s built-in feature to charge the system while simultaneously powering all other connected devices
Price and availability
At launch on November 14, 2024, Razer listed US$229.99 and €249.99 as suggested prices and said the dock was available through Razer.com, RazerStores and authorized resellers. A separate black-model listing on Razer’s US site displayed US$259.99 when retrieved on September 30, 2026. These are different price observations at different times, not a guaranteed current price; check the listing for your region and current stock before buying. The US product listing is the source for the displayed US price.
Quick Recap
Best Value
- THUNDERBOLT 5 READY — Experience speeds of up to 120 Gb/s for gaming, the ability to output to multiple displays, and connect an entire suite of peripherals—all while powering or charging a Thunderbolt 5 laptop
- 11 PORT DOCK WITH M.2 STORAGE SLOT — Features multiple Thunderbolt 5 ports, Gigabit Ethernet, a 3.5 mm audio combo jack, a UHS-II SD Card Slot, USB Type A 3.2 Gen 2 ports, and a storage slot for an ultra-fast M.2 SSD
- BUILT-IN M.2 STORAGE EXPANSION - Easily add up to 8TB of NVMe SSD storage with the integrated M.2 slot, delivering high-speed storage, faster load times, and seamless access to large files—perfect for gaming, video editing, and creative workflows.
- SUPPORTS TRIPLE 4K DISPLAYS AT 144 Hz — Enjoy a silky-smooth viewing experience when gaming or double down on resolution for creative work with an 8K display at 60 Hz; keep clutter to a minimum thanks to a single USB Type C connection
- ULTIMATE DISPLAY FLEXIBILITY - Power everything from ultra-immersive visuals to lightning-fast competitive play with display support up to 8K 60 Hz, 4K 240 Hz, triple 4K 144 Hz, or 1440p 500Hz.
Rank #4
- 11-PORT DESIGN — Outfitted with 4 USB-A ports, Gigabit Ethernet, HDMI, a 3.5 mm audio combo jack, UHS-I SD/MicroSD card slots, and 2 USB C ports to provide a docking solution for every scenario
- 4K 60 HZ DISPLAY OUTPUT — Add more screen real estate to create in brilliant 4K (60 Hz) or game at 240 Hz in Full HD. Extended display capabilities via HDMI for best and maximum performance
- 3.5MM AUDIO JACK — Advanced 7.1 surround sound provides pinpoint positional accuracy for connected speakers or headphones—delivering immersive, lifelike audio for stereo and multi-channel content alike
- DURABLE & LIGHTWEIGHT ALL-METAL CASING — The aluminum alloy body design offers unmatched strength, versatility, and precision thermal management
- 85 W LAPTOP POWER DELIVERY & SMARTPHONE FAST CHARGE* — Keep USB-C powered laptop, tablet, and mobile device topped off at all times using the dock’s built-in feature to charge the system while simultaneously powering all other connected devices. *USB charging cable and adapter not included. 100 W PD IN
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
