The primary difference between the HP Thunderbolt Dock G2 and G4 lies in their display output capabilities, Thunderbolt generation, and updated port specifications, with the G4 representing a significant technological advancement.
Key Differences at a Glance
The HP Thunderbolt Dock G4 improves upon its predecessor, the G2, by leveraging newer technologies and offering enhanced connectivity options, particularly the upgrade to Thunderbolt 4.
| Feature | HP Thunderbolt Dock G2 | HP Thunderbolt Dock G4 |
|---|---|---|
| Thunderbolt Version | Thunderbolt 3 | Thunderbolt 4 |
| Display Outputs | 2x DisplayPort, 1x VGA (and 1x USB-C DisplayPort Alt Mode for data/power) | 2x DisplayPort, 1x HDMI 2.0 |
| USB Type-A Ports | 3x USB 3.0, 1x USB 3.0 (charging) | 4x USB 3.2 Gen 1 (1x charging) |
| USB Type-C Ports | 1x USB-C (data/power), 1x Thunderbolt 3 (data/power) | 1x USB-C (USB 3.2 Gen 2, 15W out), 1x Thunderbolt 4 (data/power) |
| Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Power Delivery | Up to 100W to host (models available with 120W or 230W power adapters) | Up to 100W or 120W to host (models available with 120W or 280W power adapters) |
| Security | Standard security features | Enhanced security features (e.g., Intel VT-d-based DMA protection) |
| Compatibility | Thunderbolt 3, USB-C (DisplayPort Alt Mode) | Thunderbolt 4, Thunderbolt 3, USB-C (DisplayPort Alt Mode) |
Display Output Evolution
One of the most notable changes between the two generations is their video output configuration:
- The HP Thunderbolt Dock G2 features two full-size DisplayPort outputs and includes a VGA out port, catering to legacy display connections.
- The HP Thunderbolt Dock G4 also provides two full-size DisplayPort outputs but replaces the VGA port with a more modern HDMI 2.0 output, offering better support for contemporary monitors and televisions.
Thunderbolt Generation Upgrade
The move from Thunderbolt 3 in the G2 to Thunderbolt 4 in the G4 is a significant upgrade. While both offer impressive bandwidth, Thunderbolt 4 provides:
- Guaranteed minimums: Ensures consistent performance for data, video, and power, regardless of the host device.
- Broader compatibility: Natively supports USB4 and is backward compatible with Thunderbolt 3 and USB-C devices, simplifying connectivity.
- Enhanced security: Often includes Intel VT-d-based DMA protection for better safeguarding against direct memory access attacks.
Improved USB Connectivity
The G4 dock also brings enhancements to its USB ports:
- The HP Thunderbolt Dock G2 primarily utilizes USB 3.0 (now often referred to as USB 3.2 Gen 1) ports.
- The HP Thunderbolt Dock G4 upgrades its USB-A ports to USB 3.2 Gen 1 and features a dedicated USB-C port supporting USB 3.2 Gen 2 for faster data transfer speeds and increased power output (15W) to peripherals.
Power Delivery Capabilities
Both docks are designed to provide power to your host laptop through the Thunderbolt connection, reducing cable clutter. The G4 continues to offer robust power delivery, with models capable of supplying up to 100W or even 120W to the host, ensuring compatibility with a wide range of laptops, including more power-hungry mobile workstations.
Mac Compatibility Considerations
For Apple users, it's important to note that the ability to utilize dual external displays with these docks can be Mac model dependent. Specifically, Apple devices equipped with M-series chips have certain architectural limitations that are inherent to the chips themselves and are not related to the design or capabilities of either the G2 or G4 docks. Users should consult their Mac model's specifications for display support.
For more detailed specifications, you can refer to the official HP Thunderbolt Dock G2 product page and HP Thunderbolt Dock G4 product page.
