LG UltraGear 27G640A-B 27" IPS QHD 300Hz 1ms G-Sync Compatible Gaming Monitor
SKU: L1-27G640A-BDisplays & Projectors › Monitors
Please enquire before ordering
The distributor has not yet confirmed the latest price and availability (last checked Jun 15, 2026)
092-251-4017Awaiting stock confirmation1 year manufacturer's warranty
GenuineFree delivery from ฿5,000Tax invoice
27-inch gaming monitor with QHD resolution, 300Hz refresh rate, and 1ms response time, featuring G-Sync Compatible and FreeSync Premium technologies for smooth, tear-free visuals
Key features
- 300Hz refresh rate for high-speed gaming
- 1ms (GtG) response time reduces motion blur and stutter
- Supports G-Sync Compatible and FreeSync Premium
- 27" IPS panel with QHD resolution of 2560x1440
- HDR 400 with 95% DCI-P3 color
Product description
The LG UltraGear 27G640A-B monitor delivers a premium gaming experience with a 27-inch IPS panel, QHD resolution of 2560 x 1440 pixels, up to 300Hz refresh rate, and a 1ms (GtG) response time for smooth, stutter-free motion, even in fast-paced games. It supports NVIDIA G-Sync Compatible and AMD FreeSync Premium technologies to effectively reduce screen tearing and stutter. With HDR 400, peak brightness of 400 cd/m², and 95% DCI-P3 color accuracy (Typ.), factory-calibrated for precise and vibrant colors, this monitor is ideal for gaming, video editing, and graphics work requiring high resolution.
More features
- Ports: HDMI 2.1 x2, DisplayPort 1.4, USB-C PD 15W
- Bezel-less design with 3 sides slimmed
- Adjustable in Tilt, Swivel, Pivot, and Height
- Supports single-cable USB-C connection for charging and video signal
- Additional features include FPS Counter, Crosshair, and Black Stabilizer
Pros and limitations
Pros
- 300Hz refresh rate ensures smooth, stutter-free gameplay
- 1ms response time minimizes blur and stutter in fast-paced games
- Supports both G-Sync and FreeSync Premium, compatible with all graphics cards
- Premium IPS panel with vibrant, accurate colors and 95% DCI-P3 color coverage
- Full ports, including USB-C for single-cable charging and signal transmission
Limitations
- Requires an external power adapter, not an integrated power cable
- No surround sound speakers or excellent stereo audio system
Who it is for
Ideal for gamers seeking smooth, tear-free visuals, as well as users needing high-resolution displays for graphic design, video editing, and creative work
Specifications (45)
- HDR
- VESA DisplayHDR™ 400
- VRR
- Yes
- Ports
- HDMI x2 (2.1), DisplayPort x1 (1.4), USB-C (PD 15W), USB Upstream x1 (3.0), USB Downstream x2 (3.0)
- Speaker
- 5W x 2
- Crosshair
- Yes
- Brightness
- 400 cd/m² (Typ.)
- Panel Size
- 27
- Panel Type
- IPS
- Resolution
- 2560 x 1440
- VESA Mount
- 100 x 100 mm
- Color Depth
- 1.07B
- Color Gamut
- DCI P3 95% (CIE1976)
- FPS Counter
- Yes
- HDR Support
- HDR 10
- Pixel Pitch
- 0.2328 x 0.2328 mm
- Reader Mode
- Yes
- Aspect Ratio
- 16:9
- Flicker Safe
- Yes
- Refresh Rate
- 300 Hz
- Adjustability
- Tilt, Swivel, Pivot, Height
- Input Voltage
- 100~240V (50/60Hz)
- Response Time
- 1ms (GtG at Faster)
- Viewing Angle
- 178º (R/L), 178º (U/D)
- Brightness Min
- 320 cd/m²
- Color Weakness
- Yes
- Contrast Ratio
- 1300:1 (Typ.)
- Color Gamut Min
- DCI P3 90% (CIE1976)
- Shipping Weight
- 7.4 kg
- Black Stabilizer
- Yes
- FreeSync Support
- FreeSync Premium
- User Defined Key
- Yes
- Auto Input Switch
- Yes
- Power Consumption
- External Power (Adapter)
- Weight With Stand
- 5.47 kg
- Contrast Ratio Min
- 600:1
- Factory Calibrated
- Yes
- Dynamic Action Sync
- Yes
- Shipping Dimensions
- 810 × 165 × 465 mm
- Smart Energy Saving
- Yes
- G-Sync Compatibility
- G-Sync Compatible
- Weight Without Stand
- 3.4 kg
- Dimensions With Stand
- 613.68 × 539.1 × 239 mm
- Dimensions Without Stand
- 613.68 × 365.77 × 57.44 mm
- Power Consumption DC Off
- Less than 0.3W
- Power Consumption Sleep Mode
- Less than 0.5W
Datasheets and manuals straight from the manufacturer — select a document to open or download it.
12 questions
Frequently asked questions about this product
Compiled from manufacturer information
Does this monitor support USB-C connectivity?
Yes, supports 1 USB-C port with 15W Power Delivery. Can charge a laptop and transmit video signal through a single cable, convenient for users wanting to reduce cable clutter
Can it be used with an NVIDIA graphics card?
Yes, it supports NVIDIA G-Sync Compatible, enabling tear-free and stutter-free performance instantly when connected to a compatible NVIDIA graphics card
What is the maximum screen brightness?
Peak brightness is 400 cd/m² (Typ.), and with HDR 400 support, it delivers strong contrast between dark and bright scenes, even in bright environments
How many angles can the screen be adjusted?
Adjustable in Tilt (-5° ~ 21°), Swivel (-45° ~ 45°), Pivot (-90° ~ 90°), and Height (150 mm), allowing optimal positioning for your preferred viewing angle
What gaming features are available?
Includes FPS Counter to display frames per second, Crosshair for shooting games, Black Stabilizer to reveal details in dark scenes, and Dynamic Action Sync to reduce input lag
Is this monitor suitable for non-gaming tasks?
Yes, due to its QHD resolution, precise 95% DCI-P3 color accuracy, and factory calibration, it is well-suited for graphic design, video editing, and other high-resolution creative work
Does it have an energy-saving system?
Yes, it features Smart Energy Saving to reduce power consumption when idle, and Sleep Mode uses less than 0.5W, making it highly energy efficient
Is it in stock?
We are confirming the latest stock and price of the LG UltraGear 27G640A-B 27" IPS QHD 300Hz 1ms G-Sync Compatible Gaming Monitor with the distributor. Please contact us before ordering at 092-251-4017 or sales@gist.co.th.
How much does it cost?
The distributor has not yet confirmed the latest price and availability. Please contact us before ordering at 092-251-4017 or sales@gist.co.th.
How long is the warranty?
Warranty period: 1 year for general users (manufacturer's terms). To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.
How long does delivery take?
Orders placed before 12:00 on a business day are delivered within 1–3 business days (Bangkok and vicinity) or 2–5 business days (other provinces). Free delivery on orders of ฿5,000 or more (a ฿150 delivery fee applies below this amount).
Is it genuine?
Genuine products sourced from distributors in Thailand, covered by the manufacturer's warranty. Full tax invoices are available.
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Genuine products
Sourced from distributors in Thailand and covered by the manufacturer's warranty
Warranty period
1 year for general users
Covered by the manufacturer's warranty; you can make claims through GIST
Claims through GIST
Ship the product to our head office or bring it in person
Warranty conditions
- A receipt or other proof of purchase is required
- The product must not have been modified or altered
- Damage caused by misuse is not covered by the warranty
- To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.Head office: 554 Sky Nine Center, Floor 12A, Room 554/62, Asok-Din Daeng Road, Din Daeng Subdistrict, Din Daeng District, Bangkok 10400
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