Samsung 34″ 100 Hz Thunderbolt 3 Curved Monitor with 21:9 Wide Screen

  • Connect to Infinite Possibilities
  • Connect to Infinite Possibilities
  • Thunderbolt™ 3
  • Curved for Comfort
SKU: LC34J791WTMXUE Categories: , ,
Thunderbolt™ 3Curved for Comfort34” Ultra-Wide ScreenQuantum Dot Color

Connect to Infinite Possibilities

Connect to Infinite Possibilities

Thunderbolt™ 3

The CJ79 features two Thunderbolt™ 3 ports to connect compatible Macs and PCs. Thunderbolt™ 3 transmits video and data at speeds of up to 40Gbps — 8 times faster than USB 3.0 — and simultaneously charges devices (up to 85W), all over a single cable.

Thunderbolt™ 3

Curved for Comfort

The curved screen is engineered to follow the natural curve of your eyes for a more immersive and comfortable viewing experience. Studies by Harvard Medical School and Seoul National University Hospital found the screen reduced eyestrain in users compared to flat screens and less curved monitors.

34” Ultra-Wide Screen

The 34’’ ultra-wide curved display with its 21:9 aspect ratio provides all the workspace you need to multi-task efficiently and in comfort. Forget about inconvenient dual monitor set ups and experience truly seamless multitasking on a single screen.


Picture-by-Picture (PBP) lets you display to two sources onscreen at their native resolution. And for optimal multi-tasking, with Picture-in-Picture (PIP) you can resize the second source to up to 25% of the screen and position it anywhere.



Quantum Dot Color

Supporting up to 125%‡ sRGB color space, Quantum Dot technology delivers not only more hues than conventional monitors but also colors that are brighter, crisper, and more natural — especially reds and greens. And every monitor is factory calibrated to ensure the most accurate and life-like images

3000:1 Contrast Ratio

Samsung’s VA panel technology provides a 3000:1 contrast ratio that delivers deeper blacks, brilliant whites, and richer colors for clearer, more vibrant images.

AMD FreeSync

AMD FreeSync synchronizes the refresh rates of your graphics card and the CJ79 to minimize image tearing and stutter. The smoother transition between image frames provides seamless gameplay and video playback for uninterrupted viewing.

Fast 100 Hz Refresh Rate

The fast 100 Hz screen refresh rate provides smoother, silkier mouse sensitivity for enhanced productivity in any application. It also reduces screen stutter in fast-moving action scenes for a flawless gaming experience.


Stylish Design

With its curved screen bezeless on three sides for enhanced viewing and its rear panel — finished in glossy white and curving horizontally and vertically — neatly concealing cables, the CJ79’s slim and striking profile is the perfect complement to any Thunderbolt 3 Mac or PC.

Stylish Design

Multiple Inputs

Two Thunderbolt 3 ports as well as, DP, HDMI and USB inputs, the CJ79 provide multiple connection options for PCs, consoles, and external devices. And the built-in 7-watt stereo speakers offer an enhanced entertainment experiences when viewing videos and playing games.

Multiple Inputs


  • Screen Curvature 1500R
  • Aspect Ratio 21:9
  • Brightness (Typical) 300cd/m2
  • Contrast Ratio Static 3000:1(Typ),2400:1(Min)
  • Resolution 3,440 x 1,440
  • Response Time 4(GTG)


  • Screen Size (Inch) 34.0
  • Screen Size (cm) 86.4
  • Screen Size (Class) 34
  • Flat / Curved Curved
  • Active Display Size (HxV) (mm) 797.22mm x 333.72mm
  • Screen Curvature 1500R
  • Aspect Ratio21:9
  • Panel Type VA
  • Brightness (Typical, cd/m2) 300cd/m2
  • Peak Brightness (Typical) N/A
  • Brightness (Min, cd/m2) 250cd/m2
  • Contrast Ratio Static 3000:1(Typ),2400:1(Min)
  • Dynamic Contrast Ratio Mega
  • HDR(High Dynamic Range) N/A
  • Resolution 3,440 x 1,440
  • Response Time 4(GTG)
  • Viewing Angle (H/V) 178/178
  • Color Support1 6.7M
  • Color Gamut (NTSC 1976)8 8%
  • Color Gamut (DCI Coverage) 92%
  • sRGB Coverage 125%(Typ.), 120%(Min)
  • Adobe RGB Coverage 92%
  • Refresh Rate 100Hz

General Feature

  • Samsung MagicAngle N/A
  • Samsung MagicBright Yes
  • Samsung MagicUpscale Yes
  • Samsung MagicRotation Auto N/A
  • Eco Saving Plus Yes
  • Eco Motion Sensor N/A
  • Eco Light Sensor N/A
  • 0.00 W Off mode N/A
  • Eye Saver Mode Yes
  • Flicker Free Yes
  • Picture-In-Picture Yes
  • Picture-By-Picture Yes
  • Active Crystal Color N/A
  • Quantum Dot Color Yes
  • Game Mode Yes
  • Image Size Yes
  • USB Super Charging N/A
  • Daisy Chain Yes (Thunderbolt)
  • Easy Setting Box Yes
  • Windows Certification Windows10.0
  • FreeSync Yes
  • FreeSync 2 N/A
  • Smart Eco Saving N/A
  • Off Timer Plus N/A
  • Smartphone Wireless Charging N/A
  • Game Color Mode N/A
  • Screen Size Optimizer N/A
  • Black Equalizer N/A
  • Low Input Lag Mode N/A
  • Refresh Rate Optimizor N/A
  • Custom Key N/A
  • Super Arena Gaming UX N/A
  • Sound Interactive LED Lighting N/A


  • Wireless Display No
  • D-Sub No
  • DVI No
  • Dual Link DVI No
  • Display Port 1 EA
  • Display Port Version 1.2
  • Display Port Out No
  • Display Port Out Version N/A
  • Mini-Display Port No
  • HDMI 1 EA
  • HDMI Version 2.0
  • Audio In No
  • Headphone Yes
  • USB Ports 2
  • USB Hub Version 3
  • USB-C No
  • USB-C Charging Power N/A
  • Thunderbolt 3 2 EA
  • Thunderbolt 3 Charging Power (Port 1) 85W
  • Thunderbolt 3 Charging Power (Port 2) 15W
  • Ethernet (LAN) N/A


  • Speaker Stereo
  • USB Sound Bar (Ready) No

Operation Conditions

  • Temperature 10~40 ℃
  • Humidity 10~80,non-condensing


  • Factory Tunning Yes
  • Built in Calibration Engine N/A
  • LUT(Look-up Table) Bit Depth N/A
  • Gray Balance N/A
  • Uniformity Correction N/A
  • Color Mode N/A
  • CMS(Color Management Software) N/A
  • Factory Calibration Report N/A


  • Color Gray
  • Stand Type HAS
  • HAS (Height Adjustable Stand, mm) 100.0 ± 5.0 mm
  • Tilt HAS TOP : -14˚(±4˚) ~ 22˚(±4˚), HAS DOWN : -2˚(±4˚) ~ 34˚(±4˚)
  • Swivel N/A
  • Pivot N/A
  • Wall Mount 100 x 100


  • Energy Efficiency Class N/A
  • Recycled Plastic N/A


  • Power Supply AC 100~240V
  • Power Consumption (Max, W) 180 W
  • Power Consumption (Typ) N/A
  • Power Consumption (DPMS, W) Less than 0.5(HDMI/DP Input Condition)
  • Power Consumption (Off Mode, W) Less than 0.3 W
  • Power Consumption (Yearly) N/A
  • Type External Adaptor


  • Set Dimension with Stand (WxHxD, mm) 808.7 x 516.0 x 309.4 mm
  • Set Dimension without Stand (WxHxD, mm) 808.7 x 362.8 x 167.0 mm
  • Package Dimension (WxHxD, mm) 896.0 x 589.0 x 371.0 mm


  • Set Weight with Stand (kg) 7.7 kg
  • Set Weight without Stand (kg) 6.3 kg
  • Package Weight (kg) 13.9 kg


  • Power Cable Length 1.5 m
  • D-Sub Cable N/A
  • DVI Cable N/A
  • HDMI Cable Yes
  • HDMI to DVI Cable N/A
  • DP Cable N/A
  • USB Type-C Cable N/A
  • Thunderbolt 3 Cable Yes
  • Mini-Display Gender N/A
  • Install CD N/A
  • Quick Setup Guide Yes
  • Clean Cloth N/A


  • Disclaimer N/A
Weight 0.5 kg


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