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LG 27GX790B-B 27-Inch Ultragear QHD (3440 x 1440) OLED Gaming Monitor Dual Mode Brand New in Original Packaging 27GX790B-B Features
- Experience UltraGear's brightest and fastest OLED on a 27-inch QHD display
- Dual Mode refresh rate: switch between QHD at 540Hz or 720Hz HD speed
- 0.02ms (GtG) response time renders fast action with almost zero blur or ghosting
- DisplayPort 2.1 delivers massive bandwidth for sharper visuals and ultra-fast gameplay
- DisplayHDR True Black 500 delivers deep blacks, rich contrast, and stunning dark-scene detail
- Reduced screen stutter with NVIDIA G-SYNC compatibility AMD FreeSync Premium Pro
- Virtually borderless 27-inch OLED with adjustable screen and back lighting for a custom setup
What's in the Box
- Monitor
- Power Cable
- Display Port 2.1 Cable
- HDMI 2.1 Cable
Item Description
The LG UltraGear 27GX790B-B is a 27-inch QHD OLED gaming monitor built for competitive players who demand speed, image quality, and flexible performance. Featuring LG's latest 4th Gen OLED technology, Dual Mode refresh rates up to 720Hz, and advanced gaming features, it delivers smooth gameplay with clear visuals and responsive performance.
4th Gen OLED with Enhanced Brightness
LG's latest Primary RGB Tandem OLED technology provides improved brightness, deeper contrast, and accurate colors. DisplayHDR True Black 500 and Perfect Black certification help reveal more detail in both bright and dark scenes.
Dual Mode for Speed or Resolution
Switch between QHD resolution at 540Hz for detailed visuals or HD at 720Hz for maximum speed. Dual Mode lets players choose the ideal setting depending on the game and play style.
Ultra-Fast 0.02ms Response Time
A virtually instantaneous 0.02ms GtG response time minimizes ghosting and motion blur. Fast-moving scenes remain clear for improved tracking and quicker reactions.
DisplayPort 2.1 and Flexible Connectivity
DisplayPort 2.1 supports extremely high refresh rates, while dual HDMI 2.1 ports make connecting gaming consoles simple. USB-C and multiple USB ports provide convenient connectivity for peripherals and accessories.
Smooth and Tear-Free Gameplay
NVIDIA G-SYNC Compatible and AMD FreeSync Premium Pro help reduce screen tearing and stuttering for smoother gaming with low latency.
Clear Motion with ClearMR 21000
VESA ClearMR 21000 certification delivers exceptional motion clarity, keeping fast action scenes sharp and easy to follow.
Gaming Features for Better Performance
Dynamic Action Sync reduces input lag, Black Stabilizer improves visibility in dark areas, Crosshair assists aiming accuracy, and the FPS Counter displays frame rates in real time.
Immersive Audio Support
The 4-pole headphone jack supports both audio and microphone connections through a single cable, while DTS Headphone:X provides virtual 3D audio for more immersive gameplay.
Adjustable and Borderless Design
The four-sided, virtually borderless display creates a clean setup, while height, tilt, swivel, and pivot adjustments allow comfortable positioning for different gaming styles.
OLED Protection and Long-Term Reliability
Built-in OLED Care tools help maintain panel performance, while the included 2-year limited warranty provides additional peace of mind.
Specifications Picture Quality
- Color Depth (Number of Colors): 1.07B
- Aspect Ratio: 16:9
- Brightness (Typical, Minimum): (Typ.) 335 cd/m² (Min.) 300 cd/m²
- Color Gamut (Typ.): DCI-P3 99.5% (CIE1976)
- Contrast Ratio: 1500000:1
- Display Type: OLED
- Pixel Pitch (mm): 0.2292 x 0.2292
- Refresh Rate: 540Hz
- Resolution: 2560 x 1440
- Response Time (GTG): 0.02ms (GtG)
- Screen Size: 26.5 in
- Viewing Angle: 178º(R/L), 178º(U/D)
Special Features
- RGB LED Lighting: Unity Hexagon Lighting
- AMD FreeSync Premium Pro: Yes
- NVIDIA G-Sync Compatible: Yes
- DTS Headphone:X: Yes
- VESA Adaptive Sync: Yes
- Headphone 4-Pole (Sound+Mic): Yes
- VRR: Yes
- LG Switch: Yes
- Auto Input Switch: Yes
- Black Stabilizer: Yes
- Color Weakness Mode: Yes
- Crosshair: Yes
- Dual Controller: Yes
- Dynamic Action Sync: Yes
- Factory Calibration: Yes
- FPS Counter: Yes
- H/W Calibration (True Color Pro): Yes
- HDR Effect: Yes
- HDR10: Yes
- Live Color Low Blue Light: Yes
- Reader Mode: Yes
- Smart Energy Saving: Yes
- User-Defined Key: Yes
- VESA DisplayHDR: DisplayHDR True Black 500
Input/Output
- USB Down-stream: Yes (2ea/ver3.0)
- DisplayPort: Yes x 1
- USB Up-stream: Yes (via USB-C)
- DP Version: 2.1
- USB Type-C: Yes x 1
- HDMI: Yes x 2
- HDMI Version 2.1: Yes
- Headphone Out: Yes
- USB-C (Data Transmission): Yes
Stand
- Display Position Adjustments: Tilt/Height/Swivel/Pivot
- Wall Mount Size (mm): 100 x 100
Power
- DC Off (Max): Less than 0.5W
- Input: 100~240V (50/60Hz)
- Power Save/Sleep Mode (Max): Less than 0.5W
- Type: External Dimensions (WxHxD): 31.1 in × 7.2 in × 19.5 in
- Shipping Weight: 21.6 lbs
- With Stand (WxHxD): 23.8 in × 20.8 in × 8.7 in (Up) 23.8 in × 15.7 in × 8.7 in (Down)
- With Stand Weight: 15 lbs
- Without Stand (WxHxD): 23.8 in × 13.8 in × 2.0 in
- Without Stand Weight: 9.5 lbs
Shipping Shipping Payment Returns Shipping
Shipping is free within the continental United States (lower 48 states only). Rates include handling and insurance.
Domestic Shipping
Lower 48 States: Free shipping, including handling and insurance.
Alaska, Hawaii, Puerto Rico, U.S. Territories, APO & FPO: Additional shipping charges may apply, and some items cannot be shipped to these locations. Please use the Shipping and Payments tab with your ZIP code to confirm availability and view exact costs. Free shipping applies only to the lower 48 states.
International Shipping
All international orders are processed through ’s Global Shipping Program. Please see the Shipping tab for detailed costs and available options.
Restrictions
Orders cannot be shipped to hotel addresses at this time.
Payment Payment
We accept major credit cards and PayPal; however, American Express is not supported on this platform. All payments are securely processed through ’s managed payment system. Immediate PayPal payment is required for all Buy It Now purchases, while payments for Best Offers are due within 3 days. If you need special payment arrangements, please contact us via messages.
Please note that payments cannot be modified once an order is submitted or fulfilled, so any issues must be resolved beforehand. For payment-related questions or assistance, contact customer support directly
Returns Returns
We want you to be happy with your purchase. If you're not satisfied, you may return your item within 30 days of delivery. Please contact us via messages or the returns link to obtain an RMA number.
Domestic Purchases
- If you wish to return an item, please contact us via messages or the returns link to obtain a Returned Merchandise Authorization (RMA) number. This ensures proper handling of your return or replacement.
- To qualify for a full refund (less shipping expenses), the item must be in its original new condition, with all packaging, manuals, and paperwork intact and unaltered. Opened items are eligible for return but may be subject to a restocking fee.
- Customers are responsible for the shipping and handling costs incurred in sending the item. If your order included Free Shipping, the shipping expenses we paid on your behalf will be deducted from your refund. If an item is refused, the carrier charges for both ways will be deducted from your refund.
- All returns are subject to inspection. Items must be in brand new condition as described above. If not, the return may be deemed non-refundable or subject to a restocking fee of at least 15%. Missing accessories or signs of wear may result in higher restocking fees. For specific fee details, please contact us via messages.
- Returns must be packed in an outer shipping carton (not just the original product box), with the RMA number clearly marked on the shipping label. Include a copy of your invoice and order number, and insure your return shipment with prepaid shipping. We do not accept COD shipments.
- Certain product categories are not eligible for return due to hygienic or sanitary reasons, as required by manufacturers. Consumable goods or items locked by manufacturers (such as Apple or HP) are not returnable.
Promotional Items
- If you received a free item as part of a “Buy 1, Get 1 Free” promotion, the free item must be returned with your original return request to receive a full refund. If the free item is not returned, its value will be deducted from your refund amount.
Other Issues
- For warranty claims, lost merchandise, transit issues, or order cancellations, please contact us via messages. In the event of a price or description error, we will notify you promptly. You will have no obligation to proceed with the purchase, and any amount charged will be fully refunded.
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