Recommended Free Tools
Razer’s USB 4 Dock (RC21-0228) is a 14-port dock announced on November 14, 2024, for connecting displays and accessories through one laptop cable. Razer specifies up to 40 Gbps USB 4 bandwidth, support for 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 claims; the display modes depend on the host computer and connected displays.
What the Razer USB 4 Dock offers
The dock combines display outputs, wired networking, card readers, audio, and USB ports in a single desktop hub. Its upstream USB 4 connection is rated by Razer at up to 40 Gbps. That is the advertised interface bandwidth, not a guarantee that every attached device will transfer data at that rate.
Razer positioned the dock for gaming and work PCs. A dedicated USB port for 2.4 GHz wireless dongles is intended to reduce interference for gaming peripherals, according to the company; that benefit has not been independently established here. The dock also has its own power button, which Razer says allows connected devices to be charged without a PC connection.
What ports does the Razer USB 4 Dock have?
Razer calls this a 14-port dock. The listed connections are:
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- 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
- One HDMI 2.1 port
- One DisplayPort 1.4 port
- One Gigabit Ethernet port
- One UHS-II SD card reader and one UHS-II microSD card reader
- One 3.5 mm microphone/headphone combo jack, with 7.1 surround support
- One USB-C 3.2 Gen 2 port with up to 20 W battery charging
- One USB-A 3.2 Gen 2 port rated up to 10 Gbps
- Two USB-A 3.2 Gen 1 ports rated up to 5 Gbps
- One USB-A 2.0 port
- One dedicated USB port for 2.4 GHz wireless dongles
- One upstream USB 4 host port for the connection to the computer
The 14-port figure is Razer’s product count; the power input and included power adapter are not additional data ports.
Can it run two 4K monitors?
Razer advertises either one display at up to 4K resolution and 120 Hz, or two displays at up to 4K and 60 Hz each. These are the dock’s stated maximum configurations, not guaranteed results for every laptop. The computer must support video output over its USB-C connection, and its graphics and display capabilities can limit the resolution or refresh rate. Check the specifications for the exact computer and monitors before buying.
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
The presence of both HDMI 2.1 and DisplayPort 1.4 gives users two different display connections, but the port labels alone do not establish what a particular host can drive. Razer’s launch announcement describes its single-cable setup as a way to connect dual 4K displays; that description is the company’s positioning, not an independent performance test.
Compatibility and laptop charging
Razer’s 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. Those categories do not mean every device in them supports every dock feature. Verify that the specific model has a compatible USB-C protocol and supports video output through that port, especially if external monitors are essential.
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
The dock includes a 180 W power adapter. Razer lists laptop charging at up to 100 W peak and 96 W sustained. Actual charging also depends on the connected computer and its power requirements; the adapter’s 180 W rating should not be read as the laptop’s charging rate.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and availability
Razer announced launch MSRPs of US$229.99 and €249.99 on November 14, 2024, and said the dock would be available through Razer.com, RazerStores, and authorized resellers. Razer’s US product listing displayed US$259.99 when retrieved on September 30, 2026. These are different regional and time-specific price observations, not a current universal price. Check the live listing for your region and confirm stock before purchasing.
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
Razer’s sources establish the product’s specifications and its own listed price, but do not establish an Amazon listing, seller, or marketplace price. If shopping through a marketplace, confirm that the listing is specifically for the Razer USB 4 Dock, model RC21-0228.
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.
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.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →
