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LG UltraGear 27 inch QHD 2K 1440P 300Hz AMD FreeSync Premium & G-Sync Compatible 1ms HDR400 USB-C Built-in Speaker Gaming Computer Monitor with Height Adjustable, Swivel, Pivot & Tilt Stand 27G640A-B
- Blazing Speed Brilliant Color Total Control - Dominate every match with the 27-inch QHD IPS UltraGear gaming monitor built for pro-level speed clarity and precision delivering ultra-smooth motion with a 300Hz refresh rate and 1ms GtG response time for competitive gaming performance
- Stunning QHD IPS Clarity - Experience sharp lifelike detail on a 27-inch QHD 2560x1440 IPS display with wide viewing angles ensuring consistent color accuracy and visual fidelity from every position
- Vibrant HDR and Wide Color Gamut - Immerse yourself in cinematic brilliance with up to 95 percent DCI-P3 color coverage and VESA DisplayHDR 400 enhancing contrast brightness and depth for realistic game worlds
- Tear Free Adaptive Sync Gaming - Enjoy seamless performance with AMD FreeSync Premium and NVIDIA G-SYNC compatibility eliminating tearing and stutter for smooth fluid frames across PC and console gaming
- Ergonomic Frameless Design - The ultra-thin bezel display enhances immersion while adjustable height tilt swivel and pivot allow personalized comfort and an ideal viewing position for long gaming sessions
- Pro Level Connectivity - USB Type-C with 15W power delivery dual HDMI 2.1 ports and DisplayPort 1.4 provide high-speed connections vivid color and next-gen support for gaming PCs and consoles
- Advanced Gaming Features - Dynamic Action Sync reduces input lag Black Stabilizer brightens dark scenes and Crosshair and FPS Counter features boost aiming precision and real-time performance awareness
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Overview
Specs
Reviews (4)
Warranty & Returns
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Manufacturer Contact Info
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- Support Phone: 1-800-243-0000
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The LG UltraGear 27G640A-B is a 27-inch QHD IPS gaming monitor with a 300Hz refresh rate, 1ms response time, and FreeSync Premium and G-SYNC compatibility, suited to competitive PC gamers who prioritize fast, smooth motion.
Recommended For
- Competitive PC shooter players who want a sharp 1440p image with very high refresh and responsive motion; an owner review specifically describes using it for games such as Siege, Apex, and Destiny.
- PC gamers who play at varying frame rates and want adaptive sync: the review found its variable-refresh behavior and adaptive overdrive useful with VRR and G-Sync.
- Players sharing a desk between a gaming PC and a PlayStation 5 who want one display for both: the review reports PS5 support for 1440p, VRR, and 4K input downsampled at up to 120 Hz.
- Gamers who need a flexible desktop setup, including height, swivel, tilt, and portrait adjustment plus USB-C video input for a connected laptop; note that USB-C charging is limited to 15 W.
Real-World Use Scenarios
- In fast-paced PC shooters, players can use the high refresh rate to see motion more smoothly and track targets more clearly, provided their PC can deliver high frame rates at 1440p.
- For competitive games where frame rates vary, adaptive sync can help reduce visible tearing and stutter, so gameplay remains smoother when performance fluctuates.
- For a mix of esports and detailed single-player games, the 27-inch QHD screen offers sharper-looking images than 1080p while still supporting high-refresh-rate play; the actual frame rate depends on the PC and game.
- When playing HDR-enabled games or watching HDR video, the monitor can show more vivid color and brighter highlights, but its HDR is limited compared with displays that have local dimming or deeper blacks.
- At a shared gaming and work desk, the height, tilt, swivel, and pivot adjustments make it easier to set a comfortable viewing position or turn the screen upright for document-heavy tasks.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Competitive gaming and desktop entertainment, with a QHD IPS display, 300Hz refresh rate, 1ms response time, and FreeSync Premium and G-Sync Compatible support |
| Panel And Picture Quality | 27-inch flat IPS display with 2560 × 1440 resolution, 16:9 aspect ratio, 178° horizontal and vertical viewing angles, 400 cd/m² brightness, 1,300:1 contrast ratio, and 95% DCI-P3 color gamut; supports HDR10 and VESA DisplayHDR 400 |
| Refresh Rate And Response | 300Hz refresh rate and 1ms response time, with FreeSync Premium and G-Sync Compatible adaptive sync |
| Ports And Connectivity | 2 HDMI 2.1 ports, 1 DisplayPort 1.4, USB-C with DisplayPort Alt Mode, 1 USB 3.0 upstream port, 2 USB 3.0 Type-A downstream ports, and a headphone connection; supports HDCP |
| Stand And Mounting | Stand adjusts for height, pivot, swivel, and tilt; also supports 100 × 100mm VESA mounting |
| Audio | Built-in speakers |
| Physical Design | Black, flat-panel monitor with a thin bezel; measures 24.2 × 9.4 × 15.3–21.2 inches with stand and weighs 12.1 lb |
| Power | 100–240 VAC, 50/60Hz; power-save/sleep consumption under 0.5W and DC-off consumption under 0.3W |
| Model Identifiers | LG UltraGear G640A, model 27G640A-B |
| Included Components | Monitor, power cable, HDMI 2.1 cable, and DisplayPort cable |
Reference Q&A
Q: LG 27G640A-B vs ASUS TUF VG27AQM5A: which 1440p 300Hz monitor should I choose?
A: Both are 27-inch QHD Fast IPS monitors with a 300Hz refresh rate and adaptive sync. Choose the LG 27G640A-B if you want USB-C video input and 15W power delivery; choose the ASUS VG27AQM5A if ELMB Sync, which combines motion-blur reduction with variable refresh rate, is a priority. Check the features and connections you’ll actually use, since their headline resolution and refresh rate are similar.
Q: Is the LG 27G640A-B worth choosing over the 240Hz LG 27GR83Q-B?
A: Choose the 27G640A-B if you want the higher 300Hz ceiling and its USB-C video input with 15W power delivery. The 27GR83Q-B reaches 240Hz and may suit you if that refresh rate meets your needs or its price is lower. Both are 27-inch QHD IPS monitors with adaptive sync, so the practical difference is mainly the refresh-rate headroom, connectivity, and price.
Q: Should I get the LG 27G640A-B or spend more on the LG 27GS95QE-B OLED?
A: Choose the 27G640A-B for a 300Hz IPS display and its USB-C video input. Choose the 27GS95QE-B if OLED contrast, deeper blacks, HDR True Black 400, and its rated 0.03ms response time matter more to you; it refreshes at up to 240Hz. The OLED model emphasizes contrast and pixel response, while the IPS model offers the higher refresh-rate ceiling.
Q: Do I need a 300Hz monitor, or is the LG 27G640A-B’s 240Hz-or-lower use still worthwhile?
A: The 27G640A-B can still be a practical choice if your games often run below 300 frames per second: its QHD resolution, IPS panel, and adaptive sync remain useful, while the maximum refresh rate is headroom for games and hardware that can deliver more frames. In testing, Monitor Garage found its overdrive behavior adapted across refresh rates, with a trade-off between faster transitions and more overshoot in some settings. If you rarely play at high frame rates, a lower-refresh monitor may offer better value.
Q: What kind of PC do I need to take advantage of the 300Hz refresh rate?
A: The monitor supports up to 300Hz at QHD, but your computer and game must be able to output high frame rates to make full use of it. Actual performance depends on the connected system and game.
Q: Can I connect and charge a laptop through USB-C?
A: USB-C supports video input, and the monitor provides up to 15W of power delivery. That may power or slowly charge some compatible devices, but it is limited for laptop charging; keep the laptop’s own charger available if needed. The computer’s USB-C port must support video output.
Q: Is this monitor suitable for office work as well as gaming?
A: Yes. Its 27-inch QHD IPS screen and height, tilt, swivel, and pivot adjustments suit everyday desk work, while the high refresh rate supports gaming. It has built-in speakers but no webcam, and its 15W USB-C power delivery is limited for charging a laptop.
Q: Does it have built-in speakers?
A: Yes. The monitor has built-in speakers and a headphone connection. The provided specifications do not state speaker power or audio quality, so users who need room-filling or richer sound may prefer external speakers or headphones.
Q: Is the LG 27G640A-B a worthwhile upgrade from a 144Hz or 165Hz monitor?
A: It is most relevant if you play competitive games and your PC can produce high frame rates at 1440p. The monitor supports up to 300Hz, but discussion from owners suggests the benefit depends on the game and the frame rate your system can sustain; the upgrade may be less meaningful if you rarely exceed your current monitor’s refresh rate.
Q: Is 300Hz worth choosing over a 240Hz monitor?
A: The 300Hz maximum may suit buyers prioritizing competitive gaming, but Reddit discussion characterizes the difference between high refresh rates such as 240Hz and 300Hz as relatively small. If prices are similar, compare the monitors’ other features and your PC’s ability to deliver high frame rates rather than choosing on refresh rate alone.
Q: Is the LG 27G640A-B suitable for both work and gaming?
A: It can serve both uses if you want a 27-inch, 1440p IPS screen and a stand with height, tilt, swivel, and pivot adjustments. Its 300Hz refresh rate is aimed at gaming, while the USB-C port supports display input and only 15W power delivery, so it should not be treated as a high-power laptop charging dock.
Q: Should HDR be a main reason to buy this monitor?
A: Probably not if you are seeking a pronounced HDR experience. The monitor is specified as DisplayHDR 400, and a YouTube review specifically questions whether that level meets typical expectations for HDR. Its 1440p resolution, high refresh rate, and connectivity may be more useful purchase criteria.