This 2020 LG flagship introduced 4K@120Hz to the premium market and popularized 2.1 bandwidth in OLED. All four HDMI ports support full 2.1 specs (48Gbps), enabling 4K@120Hz, VRR, and ALLM on any input. eARC runs on HDMI 2 for lossless audio return to a soundbar. For the 2.1 ports, use Ultra High Speed HDMI cables — standard cables top out at 18Gbps. Here's every port and the cables you'll need.
2020 LG OLED GX Gallery Design with α9 AI Processor Gen3, 4K@120Hz gaming, flush wall mount.
Device Information
- Manufacturer
- LG
- Release Year
- 2020
- Model Number
- OLED GX (e.g., OLED65GXPUA; sizes 55/65/77 available)
- Category
- TV
Available Ports
| Connector | Quantity | Label | Notes |
|---|---|---|---|
| HDMI 2.1 (Type A – Standard) | 1 | HDMI 1 | 4K@120Hz, VRR, ALLM |
| HDMI 2.1 (Type A – Standard) | 1 | HDMI 2 | eARC, 4K@120Hz, VRR, ALLM |
| HDMI 2.1 (Type A – Standard) | 1 | HDMI 3 | 4K@120Hz, VRR, ALLM |
| HDMI 2.1 (Type A – Standard) | 1 | HDMI 4 | 4K@120Hz, VRR, ALLM |
| USB Type-A (USB 2.0) | 3 | — | For media playback |
| Optical TOSLINK (S/PDIF) | 1 | — | Digital audio output |
| RJ-45 (Gigabit Ethernet) | 1 | — | 10/100Mbps Ethernet |
| 3.5mm TRS (Stereo Audio) | 1 | — | Headphone output |
| RF Antenna Input (Coaxial) | 1 | — | Antenna/cable |
Notes & Compatibility
HDMI: 4x HDMI 2.1 (40Gbps, 4K@120Hz, VRR, ALLM on all 4 ports). eARC: HDMI 2. USB: 3x USB 2.0 Type-A. No DTS support (removed in 2020).
Common questions
How many ports does the LG OLED GX 55-77" OLED (2020) have?
The LG OLED GX 55-77" OLED (2020) has 11 ports in total: 4 × HDMI 2.1 (Type A – Standard), 3 × USB Type-A (USB 2.0), 1 × Optical TOSLINK (S/PDIF), 1 × RJ-45 (Gigabit Ethernet), 1 × 3.5mm TRS (Stereo Audio) and 1 × RF Antenna Input (Coaxial).
What kinds of ports does the LG OLED GX 55-77" OLED (2020) have?
By connector family, the LG OLED GX 55-77" OLED (2020) has 4 HDMI, 3 USB, 2 Audio, 1 Network and 1 Video (Legacy).
How many USB ports does the LG OLED GX 55-77" OLED (2020) have?
The LG OLED GX 55-77" OLED (2020) has 3 USB ports: 3 × USB Type-A (USB 2.0).
What video connections does the LG OLED GX 55-77" OLED (2020) have?
The LG OLED GX 55-77" OLED (2020) has 5 ports that can carry video: 4 × HDMI 2.1 (Type A – Standard) and 1 × RF Antenna Input (Coaxial).
