HP Thunderbolt 4 Dock 120W G4 Review
Transform your workspace with the HP Thunderbolt 4 Dock 120W G4. Say goodbye to cable chaos and enjoy seamless multi-device connectivity and clutter-free efficiency.
Four 4K monitors at 60Hz, 40 Gbps Thunderbolt 4, 2.5 Gigabit Ethernet, and 100W charging to the laptop. The HP Thunderbolt 4 Dock 120W G4 is one of the most capable docks on this site by raw specifications. It drives more displays at higher resolution than any non-Thunderbolt dock we have reviewed, and the 2.5Gb Ethernet is double the Gigabit standard that every other dock on this site provides. This is HP’s flagship dock for professionals who need maximum display real estate and the fastest wired connection available from a single USB-C cable.
One detail before anything else: the Amazon brand field says “ist computers,” not HP. The manufacturer field also says “ist computers.” The dock hardware is HP’s Thunderbolt 4 Dock 120W G4 model 4J0A2AA. The bullets state “one-year warranty from the HP.” The box includes the dock, power supply, power cord, and warranty. Whether this is sold directly by HP through a subsidiary listing or by a third-party reseller using the HP brand name, the listing identifies the product as HP hardware with HP warranty. Verify the seller before purchasing.
Key Specifications
| Specification | Detail |
|---|---|
| Total Ports | 13 |
| Thunderbolt 4 | 1 (host, 40 Gbps) |
| USB-C DP Alt Mode | 1 |
| USB-C Data/Power Out | 1 (USB 3.2 Gen 2, 10 Gbps, data only) |
| USB 3.2 Gen 1 | 4 (5 Gbps, 2 with charging when docked) |
| HDMI 2.0 | 1 |
| DisplayPort 1.4 | 2 |
| Ethernet | 1 (dual NIC: 1Gb + 2.5Gb) |
| Kensington Lock | 1 |
| AC Adapter Port | 1 |
| Max Displays | 4 (4K@60Hz each) |
| Data Transfer | 40 Gbps (Thunderbolt 4) |
| Power Delivery | 100W to laptop (120W total system) |
| Compatible Devices | HP EliteBook/ProBook/Pavilion/Envy/Spectre, Lenovo ThinkPad/Yoga, Dell Latitude/Precision/XPS/Inspiron, ASUS Vivobook/ZenBook/ExpertBook, MacBook, Chromebook |
| Compatible OS | Windows, macOS, Chrome OS |
| Weight | 1.68 lbs |
| Dimensions | 3.9″ L x 3.9″ W x 2.7″ H |
| Amazon Brand | “ist computers” (dock is HP hardware) |
| Warranty | 1 year (stated as “from the HP”) |
HP Thunderbolt 4 Dock 120W G4, 13-in-1 USB C Docking Station with Max 100W Charging, 4 Displays 4K Display, Ethernet Port, 6 USB Ports, HDMI, 2 Displayport for Laptop, MacOS, ChromeOS, PC
Four 4K Displays at 60Hz
Thunderbolt 4 at 40 Gbps provides enough bandwidth for four independent 4K@60Hz displays. Two DisplayPort 1.4 ports, one HDMI 2.0, and one USB-C DP Alt Mode port give you four video outputs with three different connector types. Connect two DisplayPort monitors, one HDMI screen, and one USB-C display simultaneously. Each runs at full 4K@60Hz resolution with smooth cursor movement, fluid scrolling, and sharp text.
No other non-custom dock on this site drives four 4K@60Hz displays. The Anker 778 Thunderbolt 4 drives dual 4K. The Minisopuru DS808 drives triple 4K through DisplayLink. The HP G4 drives four natively through Thunderbolt 4 without DisplayLink, without drivers, and without software rendering. That is a meaningful difference for users who run four-monitor setups for trading, development, video editing, or data analysis. For display connection requirements, see our USB-C portable monitor guide.
2.5 Gigabit Ethernet: Double the Standard
Every other dock on this site has Gigabit Ethernet (1 Gbps). The HP G4 has dual NIC cards supporting both 1Gb and 2.5Gb Ethernet. If your office network infrastructure supports 2.5Gb speeds, this dock takes advantage of it. Large file transfers, cloud sync, database queries, and remote desktop sessions all benefit from the extra bandwidth.
The dock auto-detects the network speed. On a standard Gigabit network, it runs at 1Gb. On a 2.5Gb network, it runs at 2.5Gb. No configuration needed. For remote workers whose home network supports multi-gig speeds (increasingly common with newer routers), the 2.5Gb Ethernet is future-proofing that standard Gigabit docks do not offer.
Universal Compatibility Across Brands
Unlike the HP USB-C Dock G5 which targets HP-only machines, the Thunderbolt 4 G4 lists compatibility across HP, Lenovo, Dell, ASUS, MacBook, and Chromebook. The compatible devices field names specific model numbers for HP EliteBook, ProBook, Pavilion, Envy, Spectre, Lenovo ThinkPad and Yoga, Dell Latitude, Precision, XPS, Inspiron, and ASUS Vivobook, ZenBook, and ExpertBook.
The bullets state: “Please check whether your type C port supports charging and display; if it does not, Thunderbolt 4 may not work.” Your laptop needs a Thunderbolt 4 or Thunderbolt 3 port for the full four-display, 40 Gbps experience. USB-C with DP Alt Mode may work for fewer displays. USB-C without DP Alt Mode will not work for video output. For docking station options across brands, see our docking stations hub page.
100W Power Delivery from 120W System
The dock’s total system power is 120W. 100W passes to the laptop. 20W powers the dock’s Thunderbolt controller, video outputs, USB ports, and dual Ethernet NICs. At 100W, the dock charges HP EliteBooks (45-65W), Dell XPS (45-100W depending on model), Lenovo ThinkPads (45-65W), and MacBooks (30-96W). Most business laptops receive full-speed charging. Only the highest-power workstation laptops (140W+) may charge below full speed.
What’s in the Box
| Item | Included |
|---|---|
| HP Thunderbolt 4 Dock 120W G4 | 1 |
| Power Supply | 1 |
| Power Cord | 1 |
| Warranty Documentation | 1 |
No HDMI cable. No DisplayPort cable. No Ethernet cable. You supply the monitor and network cables.
Drawbacks
| Consideration | Detail |
|---|---|
| Amazon Brand: “ist computers” | Not listed under HP brand on Amazon. Verify seller. |
| Requires Thunderbolt 4/3 | Full functionality needs Thunderbolt port. USB-C only may limit displays. |
| 1-Year Warranty | Standard. Some enterprise docks offer 3 years. |
| 1.68 lbs | Heavier than travel hubs. Desk-focused. |
| No Audio Jack Listed | Not mentioned in the Amazon port breakdown. |
Who This Dock Is For
Professionals who need four 4K monitors, 2.5Gb Ethernet, and 40 Gbps Thunderbolt 4 from a universal dock: The HP G4 is the most capable dock on this site by display count and Ethernet speed. Four 4K@60Hz displays without DisplayLink. 2.5Gb Ethernet double the standard. 100W charging. Universal compatibility across HP, Lenovo, Dell, ASUS, Mac, and Chromebook. If your work demands four monitors and the fastest wired connection, this dock delivers both from one Thunderbolt cable. For a less expensive HP dock with fewer displays, see the HP USB-C Dock G5 review.
Users without Thunderbolt ports or who need a travel-weight hub: Thunderbolt 4/3 is required for full functionality. 1.68 lbs is desk weight, not pocket weight. For lighter USB-C hubs, see our docking stations hub page.
Final Verdict
The HP Thunderbolt 4 Dock 120W G4 provides four 4K@60Hz displays, 2.5Gb Ethernet, 40 Gbps data transfer, and 100W charging from a single Thunderbolt cable. No DisplayLink drivers. No software rendering. No compromises on refresh rate. Four monitors at full resolution with the fastest Ethernet any dock on this site offers. The universal compatibility across HP, Lenovo, Dell, ASUS, MacBook, and Chromebook makes it a multi-brand professional dock rather than an HP-only enterprise tool.
The “ist computers” Amazon brand listing and 1-year warranty are the practical concerns. Verify the seller provides genuine HP hardware with HP warranty support. For professionals whose productivity depends on four monitors and the fastest wired connection available, the HP G4 is the dock that does not ask you to compromise on either.
Frequently Asked Questions
Why does the Amazon brand say “ist computers” instead of HP?
The dock hardware is HP’s Thunderbolt 4 Dock 120W G4 model 4J0A2AA. The Amazon listing may be from a third-party reseller using their own brand name. The bullets state the warranty is “from the HP.” Verify with the seller that you are receiving genuine HP hardware with HP warranty support.
Do I need Thunderbolt 4 on my laptop?
For the full four-display, 40 Gbps experience, yes. Thunderbolt 3 also works but may limit display count depending on the laptop. USB-C with DP Alt Mode may work for fewer displays. USB-C without DP Alt Mode will not output video through this dock.
What is 2.5Gb Ethernet and do I need it?
2.5Gb Ethernet is 2.5 times faster than standard Gigabit (1Gb). If your network router and infrastructure support 2.5Gb, this dock takes advantage of the extra speed. If your network is Gigabit, the dock runs at Gigabit. The dock auto-detects and adapts. The 2.5Gb capability is future-proofing for when your network upgrades.
Can I drive four monitors on a MacBook?
Depends on the MacBook model. MacBook Pro with M1 Pro/Max, M2 Pro/Max, M3 Pro/Max, or M4 Pro/Max supports multiple external displays natively. Base M1/M2/M3/M4 MacBooks are limited by Apple to one external display without DisplayLink. This dock does not use DisplayLink, so base M-series MacBooks will not get four displays.
Disclosure: As an Amazon Associate, I earn from qualifying purchases.
Docking Station Intelligence
The standards are confusing by design. These three panels decode what manufacturers won’t explain clearly. Applicable to every docking station.
The USB-C Confusion Matrix
The USB-C connector is the single greatest source of buyer confusion in docking stations. The physical plug looks identical whether it carries USB 2.0 at 480 Mbps or Thunderbolt 5 at 120 Gbps — a 250x difference in capability hidden behind the same shape. Manufacturers exploit this by labeling everything "USB-C compatible" without specifying which protocol runs through it. Two docks can look identical on the outside and behave completely differently once you plug them in.
The hierarchy matters because it determines everything: how many monitors your dock can drive, how fast files transfer, whether your laptop charges while docked, and whether you need third-party drivers. Here is the real capability ladder, from slowest to fastest:
The practical takeaway: if your laptop has Thunderbolt 4, buy a Thunderbolt dock. If it only has generic USB-C, verify whether it supports DisplayPort Alt Mode before buying anything with multi-monitor claims. Our buying guide walks through verification steps for every major laptop brand.
Power Delivery: What the Watts Mean
Power Delivery (PD) determines whether your docking station can charge your laptop while you work, or whether you need a separate charger cluttering your desk. The math is simple but rarely explained: your laptop draws a specific wattage under load, and the dock must match or exceed it. If the dock delivers less than your laptop needs, the battery slowly drains even while plugged in — defeating the purpose of a docking station entirely.
Most ultrabooks need 45–65W. Standard business laptops need 65–100W. Gaming and workstation laptops can demand 100–140W or more. The dock’s advertised PD wattage is the maximum it can deliver to your laptop — but this drops if you charge other devices (phones, tablets) through the dock simultaneously. Always leave a 15–20W margin above your laptop’s requirement.
Check your laptop’s original charger wattage — that’s your baseline. Our FAQ covers how to find this for every major brand.
Native Display vs DisplayLink: The Hidden Factor
This is the decision most buyers don’t know they’re making. When a docking station outputs video to your monitors, it uses one of two fundamentally different methods: native (the dock passes your laptop’s GPU signal directly to the monitor) or DisplayLink (the dock compresses video over USB and a software driver renders it). The difference is invisible in marketing materials but profoundly affects your daily experience.
Native output through DisplayPort Alt Mode or Thunderbolt uses your laptop’s actual graphics hardware. There is zero added latency, full DRM support for streaming services, no CPU overhead, and no driver to install. DisplayLink, by contrast, adds 5–15ms of latency (noticeable in video calls and cursor movement), blocks DRM content on connected monitors (Netflix, Disney+ show black screens), consumes 3–8% of your CPU constantly, and requires a driver that Apple’s macOS security updates occasionally break.
DisplayLink exists for one reason: Apple Silicon base chips (M1, M2, M3) can only drive one external display natively. If you need two or more monitors on a base MacBook Air or 13” MacBook Pro, DisplayLink is your only option. For everyone else — Windows users, Mac Pro/Max chip users, Intel/AMD laptops — native is always the better choice.
Native (Alt Mode / Thunderbolt)
DisplayLink (USB compression)
The bottom line: if your laptop supports native multi-display output, always choose a native dock. DisplayLink is a workaround, not an upgrade. See our glossary for detailed definitions.
COMMAND CENTERCOMMAND CENTER
Six tools that decode the confusion manufacturers create. Port protocols, power budgets, display configurations, compatibility, desk planning, and future-proofing. Full buying guide →
Port Protocol DecoderWhat does your connection type actually support? Glossary
Power Delivery CalculatorCan this dock keep your laptop charged?
Display Configuration PlannerCan your dock push enough pixels?
Laptop-to-Dock CompatibilityWill this dock work with YOUR laptop?
Desk Setup ArchitectWhat ports do you actually need?
Select everything you need to connect: