HP Thunderbolt Dock G2 vs G4 - HP Dock Comparison 2026

HP Thunderbolt Dock G2 vs G4: the short answer

The HP Thunderbolt Dock 120W G2 and HP Thunderbolt Dock 120W G4 look related because both are compact HP cube docks for business laptops, both use external DC power, and both can deliver up to 100W to supported HP notebooks. They are not the same kind of buy in 2026.

The G2 is the older Thunderbolt 3 dock. Its best arguments are practical: VGA for older meeting rooms, a 3.5mm combo audio jack, tested support notes for older HP and some Mac systems, and a port mix that still works for office desks built around DisplayPort. It is most appealing when the price is low and the laptop fleet is already known to work with it.

The G4 is the newer Thunderbolt 4 dock. It wins this comparison because the product data gives it the higher score, broader display ceiling, faster Ethernet, HDMI 2.0, Linux support, and HP Sure Start security. It is the safer pick for a Windows-based HP business deployment unless you specifically need one of the G2’s older ports.

Winner: HP Thunderbolt Dock 120W G4. It has a 7.8 score versus 7.1 for the G2, moves from Thunderbolt 3 to Thunderbolt 4, supports up to four 4K@60Hz displays on the right host, includes 2.5 Gigabit Ethernet, and adds enterprise security that the G2 product data does not list.

If you are choosing between HP’s dock lineup and non-HP options, also read our USB-C vs Thunderbolt docking station guide before buying. HP docks can be excellent in HP-managed Windows environments, but they are not always the easiest universal docks for mixed Mac and Windows desks.

Quick specs comparison

Why the G4 wins overall

The simplest reason is that the G4 has the stronger factual profile in the YAML. It scores 7.8 versus the G2’s 7.1, and that difference matches the hardware story. The G4 is a Thunderbolt 4 dock built for newer business laptops, while the G2 is a Thunderbolt 3 dock that still works well only when its compatibility assumptions line up with your laptop.

That matters because HP docking stations are not always generic plug-and-forget accessories. The G2 product data repeatedly warns that charging, display support, the power button, Wake-on-LAN, MAC Address Pass Through, WLAN-LAN switching, and other manageability features depend on the host system. The G4 also has host-specific caveats, especially around macOS and non-HP laptops, but its baseline is newer. It adds Thunderbolt 4, 2.5 Gigabit Ethernet, HDMI, Linux support, and HP Sure Start.

The G4 is not a clean win for every desk. It drops the G2’s VGA port and 3.5mm audio jack. It also has a non-removable host cable, and the product data calls macOS multi-display support severely limited through MST. Still, if the question is which HP dock is the better default buy in 2026, the G4 is the answer.

Host connection and laptop fit

The G2 uses Thunderbolt 3 at 40 Gbps. The G4 uses Thunderbolt 4 at the same listed 40 Gbps. The raw bandwidth number is not the whole story. Thunderbolt 4 matters because it targets a newer generation of business laptops and tighter platform expectations, especially in Windows fleets where IT teams also care about firmware and management.

The G2 is best understood as a dock for older HP Thunderbolt 3 systems. Its product data names EliteBook, ProBook, Spectre, and similar mainstream HP laptops as the better fit. It also warns that USB-C hosts without Thunderbolt fall back to USB 3.0 Gen 1 speeds, with the downstream Thunderbolt port behaving as USB 2.0 data and 15W power out with no video. That is a big caveat if you are buying used docks for a mixed collection of USB-C laptops.

The G4 is also business-first, but it is a Thunderbolt 4 dock with explicit support entries for Windows, macOS, Linux, and ChromeOS. Its known incompatibilities focus on base Apple Silicon display limits, macOS MST behavior, and non-HP power button or LED behavior. Those are still real limitations, but they are easier to reason about than the G2’s older Thunderbolt 3 and USB-C fallback behavior.

Connection winner: HP Thunderbolt Dock G4. Both docks list 40 Gbps, but the G4’s Thunderbolt 4 host connection and newer OS support make it the better fit for current business laptops.

Display support: G4 goes wider, G2 keeps older-room flexibility

The display comparison is where the G4 pulls ahead on paper. The G4 product data lists up to four 4K@60Hz displays at the top end, but only when the host supports DisplayPort 1.4, Display Stream Compression, and four DP streams. It also lists single, dual, and triple 4K@60Hz configurations, with the note that the lower DisplayPort and USB-C DP Alt Mode port are mutually exclusive.

The G2 product data lists up to three displays. Its best case is three 4K@60Hz displays on hosts that support DisplayPort 1.4 with DSC. It also lists single 5K@60Hz support on DP 1.3 Thunderbolt hosts and dual 4K-class output at 60Hz on Thunderbolt hosts using DisplayPort plus downstream Thunderbolt or USB-C video. Lower bandwidth hosts step down to QHD or FHD combinations.

For a modern Windows desk with multiple matching 4K monitors, the G4 is more capable. For an older conference room, the G2 has one advantage the G4 cannot match: VGA. If your office still has projectors, old panels, or meeting rooms wired around VGA, the G2 solves that without an adapter. The G4 trades that legacy output for HDMI 2.0.

Mac users should be careful with both. The G4 product data says macOS 12.1 or later is supported for basic functionality, but multi-display is limited to mirrored mode because macOS does not support MST in extended mode. The G2 product data lists tested MacBook Pro and MacBook Air models, including Intel and M1 machines, but still warns that Apple’s external display limits and the host’s Thunderbolt capabilities decide how many independent displays you can run.

Display winner: HP Thunderbolt Dock G4 for Windows multi-monitor desks. The G2 remains the better pick only when VGA matters or when a specific older HP Thunderbolt 3 setup is already validated.

Ports: newer network and HDMI versus legacy audio and VGA

The G4 has the cleaner modern office port mix. It includes two DisplayPort 1.4 outputs, HDMI 2.0, two USB-C 3.2 ports, four USB-A 3.2 ports, and RJ45 with 1 Gbps and 2.5 Gbps speeds listed. That 2.5 Gigabit Ethernet entry is useful for office networks, NAS access, and desks connected to newer switches.

The G2 feels more transitional. It has two DisplayPort 1.4 outputs, VGA, one downstream Thunderbolt 3 port, two USB-C 3.2 entries with 15W power out, three USB-A 3.0 ports, Gigabit Ethernet, and a 3.5mm combo audio jack. For some desks that is exactly right. If you use wired headsets through a combo jack, or if your conference room still expects VGA, the G2 has useful ports that the G4 removed.

Neither dock includes an SD or microSD card reader. If removable media is part of your workflow, both HP docks need an external USB reader. That is one reason creative users may prefer a different Thunderbolt dock altogether, such as options covered on our best docking stations for dual monitors page or our broader docking station buying guide.

The G4’s port advantage is mostly about current desks: HDMI, one extra USB-A port, USB-A 3.2 instead of USB-A 3.0 in the listed data, and faster Ethernet. The G2’s port advantage is about older accessories: VGA and 3.5mm audio.

Port winner: HP Thunderbolt Dock G4 for most desks. Choose the G2 if VGA or a built-in analog audio jack is a requirement.

Charging and power delivery

Both products are the 120W class HP docks, and both list up to 100W host charging for supported HP systems. That is enough for many business notebooks, but it is not the right power tier for every workstation.

The G2 product data is more explicit about charging limits. It says the dock provides up to 100W to supported HP systems and up to 75W on non-HP machines. It also warns that the 120W G2 is the wrong power tier for HP ZBooks and mobile workstations needing more than 100W, and points those users toward HP’s higher-power G2 combo-cable model.

The G4 product data lists 100W Power Delivery for most business laptops through its Thunderbolt 4 cable. It also notes a non-removable cable, which is a design concern because a damaged host cable cannot be replaced like a standard cable. The G2 has a fixed cable too, and it is slightly shorter at 0.7m versus 0.8m for the G4.

If you use a mainstream HP business laptop, both docks can make sense from a charging standpoint. If you use a non-HP laptop, the G4 is the safer read from the available specs because the G2 data specifically calls out the 75W non-HP cap. If you use a high-power ZBook, neither 120W model should be bought without checking your workstation’s charging requirements.

Charging winner: HP Thunderbolt Dock G4 by fewer caveats. Both list 100W for supported HP systems, but the G2’s non-HP 75W note and ZBook warning make it more conditional.

Drivers, firmware, and enterprise management

Neither dock uses DisplayLink or Silicon Motion for graphics. That is good. Video output runs through native Thunderbolt or USB-C DisplayPort paths instead of a compressed USB graphics driver. For latency, HDCP behavior, and general predictability, native display paths are usually preferable.

That does not mean there is nothing to install. The G2 product data says HP provides dock firmware, Ethernet, and audio support downloads. It also lists enterprise features such as PXE Boot, Wake-on-LAN, MAC Address Pass Through, and WLAN-LAN switching, but those depend on the host system and OS. In practice, that makes the G2 an IT dock first and a universal dock second.

The G4 also works without third-party display drivers for basic functionality. HP provides optional firmware updates and Ethernet or audio drivers through HP support. The product data says firmware updates are available only on Windows and Linux, and HP does not provide Ethernet and audio drivers for macOS. That macOS note matters if you are trying to standardize one dock across MacBooks and HP EliteBooks.

The G4’s standout enterprise feature is HP Sure Start. The product data describes it as firmware-level security that meets NIST 800-193 compliance requirements. If your buyer is an IT department, that is a meaningful differentiator. The G2 has enterprise manageability basics, but the G4 has the stronger security story in the available data.

Management winner: HP Thunderbolt Dock G4. The G2 has useful fleet features, but HP Sure Start and the newer platform support give the G4 the edge.

macOS, Windows, Linux, and ChromeOS compatibility

For Windows, the G4 is the better default choice. Its product data lists Windows 10 19H1 or later with full support, including quad 4K displays when the host is DSC-capable. The G2 lists Windows 10 and calls it the best-supported platform for HP firmware, manageability, and multi-monitor behavior, but it is still older and more host-sensitive.

For macOS, neither is perfect. The G2 lists macOS 10.10 or later and tested third-party MacBook Pro and MacBook Air models, including Intel and M1 machines. That sounds broad, but the YAML still warns that macOS external display limits and the host’s Thunderbolt capabilities decide the final display behavior. The G4 lists macOS 12.1 or later, but its known incompatibilities are sharper: MST extended mode is not supported on macOS, base Apple Silicon chips are limited to one external display, and HP does not provide Ethernet and audio drivers for macOS.

For Linux, the G4 has an explicit support entry: Ubuntu 20.04 LTS with kernel 5.14. The G2 product data does not list Linux. For ChromeOS, the G2 lists tested third-party Chromebook hardware and Amazon Chrome OS compatibility for its 2UK37UT#ABA listing. The G4 lists ChromeOS M101 and later with Thunderbolt-equipped Chromebooks.

If you are buying for an HP Windows fleet, the G4 is the better dock. If you are buying for MacBooks, check the exact display requirement before buying either one. If the setup needs two or more extended displays on macOS, HP’s MST-heavy display path can be the wrong match.

Compatibility winner: HP Thunderbolt Dock G4 for Windows, Linux, and newer ChromeOS environments. For MacBooks, neither dock is a blanket recommendation.

Reliability and common issues

Both product files list sleep and display stability issues. That is not unusual for business docks, but it matters when choosing between an older used dock and a newer one.

The G2 common issues include external displays flickering, dropping signal, or failing to wake after sleep. The suggested fix is current HP dock firmware, host BIOS or Thunderbolt updates, certified cables, and reconnecting the host cable if displays stay dark after wake. The G2 file also lists occasional Ethernet inconsistency and occasional fan noise.

The G4 common issues also include external displays losing signal after sleep or wake, with the same basic fix: unplug and replug the Thunderbolt cable and update firmware. It also lists rare firmware update failure that can temporarily brick the dock, with built-in self-healing recovery, plus occasional DisplayPort signal dropouts and monitor sleep behavior after shutdown.

Neither dock is issue-free in the product data. The G4 still wins because its upside is higher and its score is better, but this is not a category where it crushes the G2. If your office already has a stable G2 deployment with known HP laptops, replacing every desk just because the G4 exists may not be necessary.

Reliability winner: slight edge to HP Thunderbolt Dock G4. The score favors the G4, but both need firmware discipline and host compatibility checks.

Value in 2026

The G4 has a listed MSRP of $329 in the product data. The G2 file does not list an MSRP, and in 2026 it is often evaluated as an older or secondhand business dock rather than a new flagship purchase.

That changes the buying logic. If the G2 is cheap and you are matching it with older HP Thunderbolt 3 laptops, it can still be a good office dock. It has the right ports for many older desks, and the VGA output can save you from adapters in legacy rooms. It is not the safest universal dock, but it can be the right inventory match.

The G4 is the better value when you are buying for current HP business laptops. You get Thunderbolt 4, a stronger display ceiling, faster Ethernet, HDMI, HP Sure Start, and broader OS support. You also avoid the G2’s non-HP 75W charging warning.

A good rule: do not buy the G2 at a price close to the G4. The G2 needs to be meaningfully cheaper or uniquely useful because of VGA or audio. If the prices are similar, the G4 is the better buy.

Verdict: choose the G4 unless the G2 solves a specific old-port problem

The HP Thunderbolt Dock 120W G4 wins because it is the newer, higher-scoring, more capable business dock in the product data. Thunderbolt 4, up to four 4K@60Hz displays on compatible DSC hosts, 2.5 Gigabit Ethernet, HDMI 2.0, Linux support, and HP Sure Start make it a better default recommendation for HP Windows fleets.

The HP Thunderbolt Dock 120W G2 still has a role. It is a sensible low-cost dock for older HP Thunderbolt 3 systems, especially where VGA or a 3.5mm audio jack is still useful. It is also a reasonable replacement purchase if an office already standardized on G2 docks and the host laptops are known to work well with them.

Choose the HP Thunderbolt Dock G4 if:

• You are buying for a newer HP business laptop fleet.
• You want Thunderbolt 4 rather than Thunderbolt 3.
• You need the highest listed display ceiling, up to four 4K@60Hz displays on compatible Windows hosts.
• You want 2.5 Gigabit Ethernet.
• HP Sure Start and NIST 800-193 security matter to your IT team.
• You need explicit Linux support in the product data.
• HDMI 2.0 is more useful to you than VGA.

Choose the HP Thunderbolt Dock G2 if:

• You already use older HP Thunderbolt 3 laptops that are validated with the G2.
• You need VGA for conference rooms, projectors, or older monitors.
• You want a built-in 3.5mm combo audio jack.
• You can buy it cheaply enough that the G4’s newer hardware is not worth the difference.
• You are replacing an existing G2 in a known stable setup.
• Your laptop does not need more than the G2’s supported charging limit.

For individual product details, read the full HP Thunderbolt Dock G2 review and HP Thunderbolt Dock G4 review. If you are comparing HP against other business docks, the Dell WD22TB4 review is a useful next stop, and our homepage ranks every dock currently in the database.