This 27-inch QHD gaming monitor runs an OLED panel at a 480Hz refresh rate with a 0.03ms response time and DisplayHDR 400 True Black certification. It stands out for including a true DisplayPort 2.1 input alongside two HDMI 2.1 ports, giving it more headroom than the DisplayPort 1.4 found on many rivals. There is no USB-C video input. A USB 3.0 hub (one upstream, two downstream) and a DTS-tuned 3.5mm headphone jack round things out, and the monitor draws power from an external adapter.
LG’s 27″ 480Hz OLED with DisplayPort 2.1, dual HDMI 2.1, a USB 3.0 hub and a 3.5mm headphone jack.
Device Information
- Manufacturer
- LG
- Release Year
- 2025
- Model Number
- 27GX790A-B
- Category
- Monitor
Source: manufacturer product page · Last updated: · How we verify port data →
Available Ports
| Connector | Quantity | Power (PD) | Capabilities | Label | Notes |
|---|---|---|---|---|---|
| HDMI 2.1 (Type A – Standard) | 2 | — | — | HDMI | 1440p @ 480Hz; VRR/ALLM |
| DisplayPort 2.1 | 1 | — | — | DisplayPort 2.1 | 1440p @ 480Hz |
| USB Type-B (USB 3.2 Gen 1) | 1 | — | — | USB upstream | Connects hub to PC (USB 3.0) |
| USB Type-A (USB 3.2 Gen 1) | 2 | — | — | USB downstream | USB 3.0 hub ports |
| 3.5mm TRS (Stereo Audio) | 1 | — | — | Headphone out | DTS-tuned 3.5mm audio jack |
Notes & Compatibility
A genuine DisplayPort 2.1 input sits alongside two HDMI 2.1; there is no USB-C video input. LG’s DisplayPort 2.1 runs at UHBR13.5 (54 Gbps) rather than the full UHBR20, so 1440p at 480 Hz is carried with DSC, not uncompressed: use the supplied or a certified DP 2.1 cable, never an old DP 1.2 lead. The USB hub is USB 3.0, one Type-B upstream and two Type-A downstream, so a PC needs a separate USB-B to USB-A cable alongside the video lead before the hub does anything. The headphone jack is a 4-pole sound-plus-mic socket, so a single-plug headset works without a splitter. Power comes from an external 19 V 7.37 A adapter. LG advises RTX 50 series owners to update to GeForce Hotfix driver 576.26 or later to avoid DisplayPort 2.1 blackouts.
Common questions
How many ports does the LG UltraGear 27GX790A 27" OLED 480Hz (2025) have?
The LG UltraGear 27GX790A 27" OLED 480Hz (2025) has 7 ports in total: 2 × HDMI 2.1 (Type A – Standard), 1 × DisplayPort 2.1, 1 × USB Type-B (USB 3.2 Gen 1), 2 × USB Type-A (USB 3.2 Gen 1) and 1 × 3.5mm TRS (Stereo Audio).
What kinds of ports does the LG UltraGear 27GX790A 27" OLED 480Hz (2025) have?
By connector family, the LG UltraGear 27GX790A 27" OLED 480Hz (2025) has 3 USB, 2 HDMI, 1 DisplayPort and 1 Audio.
How many USB ports does the LG UltraGear 27GX790A 27" OLED 480Hz (2025) have?
The LG UltraGear 27GX790A 27" OLED 480Hz (2025) has 3 USB ports: 1 × USB Type-B (USB 3.2 Gen 1) and 2 × USB Type-A (USB 3.2 Gen 1).
What video connections does the LG UltraGear 27GX790A 27" OLED 480Hz (2025) have?
The LG UltraGear 27GX790A 27" OLED 480Hz (2025) has 3 ports that can carry video: 2 × HDMI 2.1 (Type A – Standard) and 1 × DisplayPort 2.1.
