AOC GAMING U27G3X User manual

1
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©2022 AOC. All Rights Reserved.
®
LCD Monitor
User Manual
U27G3X

i
Safety ................................................................................................................................................................................... 1
National Conventions ................................................................................................................................................ 1
Power ........................................................................................................................................................................ 2
Installation ................................................................................................................................................................. 3
Cleaning .................................................................................................................................................................... 4
Other ......................................................................................................................................................................... 5
Setup .................................................................................................................................................................................... 6
Contents in Box......................................................................................................................................................... 6
Setup Stand & Base.................................................................................................................................................. 7
Adjusting Viewing Angle............................................................................................................................................ 8
Connecting the Monitor ............................................................................................................................................. 9
Wall Mounting.......................................................................................................................................................... 10
Adaptive-Sync function ............................................................................................................................................11
HDR ........................................................................................................................................................................ 12
Adjusting............................................................................................................................................................................. 13
Hotkeys ................................................................................................................................................................... 13
OSD Setting ............................................................................................................................................................ 14
Luminance ................................................................................................................................................... 15
Color Setup.................................................................................................................................................. 17
Picture Boost ............................................................................................................................................... 18
OSD Setup................................................................................................................................................... 19
PIP Setting................................................................................................................................................... 20
Game Setting............................................................................................................................................... 21
Extra ............................................................................................................................................................ 22
Exit............................................................................................................................................................... 23
LED Indicator .......................................................................................................................................................... 24
Troubleshoot....................................................................................................................................................................... 25
Specication ....................................................................................................................................................................... 26
General Specication .............................................................................................................................................. 26
Preset Display Modes ............................................................................................................................................. 27
Pin Assignments...................................................................................................................................................... 28
Plug and Play .......................................................................................................................................................... 29

1
Safety
National Conventions
The following subsections describe national conventions used in this document.
Notes, Cautions, and Warnings
Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type. These
blocks are notes, cautions, and warnings, and they are used as follows:
NOTE: A NOTE indicates important information that helps you make better use of your computer system.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
problem.
WARNING: A WARNING indicates the potential for bodily harm and tells you how to avoid the problem. Some warnings
may appear in alternate formats and may be unaccompanied by an icon. In such cases, the specic presentation of the
warning is mandated by regulatory authority.

2
Power
The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the
type of power supplied to your home, consult your dealer or local power company.
The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will t
only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have an
electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of
the grounded plug.
Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the
monitor from damage due to power surges.
Do not overload power strips and extension cords. Overloading can result in re or electric shock.
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate congured
receptacles marked between 100-240V AC, Min. 5A.
The wall socket shall be installed near the equipment and shall be easily accessible.

3
Installation
Do not place the monitor on an unstable cart, stand, tripod, bracket, or table. If the monitor falls, it can injure a
person and cause serious damage to this product. Use only a cart, stand, tripod, bracket, or table recommended by
the manufacturer or sold with this product. Follow the manufacturer’s instructions when installing the product and use
mounting accessories recommended by the manufacturer. A product and cart combination should be moved with care.
Never push any object into the slot on the monitor cabinet. It could damage circuit parts causing a re or electric
shock. Never spill liquids on the monitor.
Do not place the front of the product on the oor.
If you mount the monitor on a wall or shelf, use a mounting kit approved by the manufacturer and follow the kit
instructions.
Leave some space around the monitor as shown below. Otherwise, air-circulation may be inadequate hence
overheating may cause a re or damage to the monitor.
To avoid potential damage, for example the panel peeling from the bezel, ensure that the monitor does not tilt
downward by more than -5 degrees. If the -5 degree downward tilt angle maximum is exceeded, the monitor damage will
not be covered under warranty.
See below the recommended ventilation areas around the monitor when the monitor is installed on the wall or on the
stand:
Installed with stand
Installed with stand
12 inches
30cm
4 inches
10cm
4 inches
10cm
4 inches
10cm
Leave at least this much
space around the set

4
Cleaning
Clean the cabinet regularly with cloth. You can use soft-detergent to wipe out the stain, instead of strong-detergent
which will cauterize the product cabinet.
When cleaning, make sure no detergent is leaked into the product. The cleaning cloth should not be too rough as it
will scratch the screen surface.
Please disconnect the power cord before cleaning the product.

5
Other
If the product is emitting a strange smell, sound or smoke, disconnect the power plug IMMEDIATELY and contact a
Service Center.
Make sure that the ventilating openings are not blocked by a table or curtain.
Do not engage the LCD monitor in severe vibration or high impact conditions during operation.
Do not knock or drop the monitor during operation or transportation.
IThe power cords shall be safety approved. For Germany, it shall be H03VV-F, 3G, 0.75 mm2, or better. For other
countries, the suitable types shall be used accordingly.
IExcessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the equalizer to
maximum increases the earphones and headphones output voltage and therefore the sound pressure level.

6
Setup
Contents in Box
*
*
Quick Start Warranty card Stand Base
Power Cable HDMI Cable DP Cable
*
*
Not all signal cables will be provided for all countries and regions. Please check with the local dealer or AOC branch
ofce for conrmation.

7
Stand &Base Setup
Please setup or remove the base following the steps as below.
Setup:
Remove:

8
Adjusting Viewing Angle
To achieve the best viewing experience, it is recommended that the user can make sure they are able to look at their
whole face on the screen, then adjust the monitor’s angle based on personal preference..
Hold the stand so you will not topple the monitor when you change the monitor’s angle.
You are able to adjust the monitor as below:
130mm
30°
30°
90°
90°
NOTE:
Do not touch the LCD screen when you change the angle. It may cause damage or break the LCD screen.
WARNING:
1. To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward by more
than -5 degrees.
2. Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.

9
Connecting the Monitor
Cable Connections In Back of Monitor and Computer:
36
1
24
5
1. HDMI1
2. HDMI2
3. DP1
4. DP2
5. Earphone
6. Power
Connect to PC
1. Connect the power cord to the back of the display rmly.
2. Turn off your computer and unplug its power cable.
3. Connect the display signal cable to the video connector on the back of your computer.
4. Plug the power cord of your computer and your display into a nearby outlet.
5. Turn on your computer and display.
If your monitor displays an image, installation is complete. If it does not display an image, please refer to Troubleshoot.
To protect equipment, always turn off the PC and LCD monitor before connecting.

10
Wall Mounting
Preparing to Install An Optional Wall Mounting Arm.
This monitor can be attached to a wall mounting arm you purchase separately. Disconnect power before this procedure.
Follow these steps:
1. Remove the base.
2. Follow the manufacturer’s instructions to assemble the wall mounting arm.
3. Place the wall mounting arm onto the back of the monitor. Line up the holes of the arm with the holes in the back of the
monitor.
4. Insert the 4 screws into the holes and tighten.
5. Reconnect the cables. Refer to the user’s manual that came with the optional wall mounting arm for instructions on
attaching it to the wall.
Noted: VESA mounting screw holes are not available for all models, please check with the dealer or ofcial
department of AOC.
* Display design may differ from those illustrated.
WARNING:
1. To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward by more than
-5 degrees.
2. Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.

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G-SYNC Compatible function
1. G-SYNC Compatible function is working with DP/HDMI
2. To enjoy the perfect gaming experience with G-SYNC, you need to purchase a Separate NVIDIA GPU card that
supports G-SYNC.
G-sync system requirements
Desktop computer connected to G-SYNC monitor:
Graphics cards supported: G-SYNC features require NVIDIA GeForce® GTX 650 Ti BOOST or higher graphics cards.
Driver: R340.52 or later
Operating system:
Windows 10
Windows 8.1
Windows 7
System requirements: DisplayPort 1.2 of the GPU must be supported.
Notebook computer connected to G-SYNC monitor:
Supported graphics cards: NVIDIA GeForce® GTX 980M, GTX 970M, GTX 965M GPU or higher graphics cards
Driver: R340.52 or higher
Operating system:
Windows 10
Windows 8.1
Windows 7
System requirements: DisplayPort 1.2 driven directly from the GPU must be supported.
For more information about NVIDIA G-SYNC, please visit: https://www.nvidia.cn/

12
HDR
It is compatible with input signals in HDR10 format.
The display may automatically activate the HDR function if the player and content are compatible. Please contact the
device manufacturer and the content provider for information on the compatibility of your device and content. Please
select “OFF” for the HDR function when you have no need for automatical activation function.
Note:
1. No special setting is needed for the DisplayPort/HDMI interface in WIN10 versions lower (older) than V1703.
2. Only the HDMI interface is available and the DisplayPort interface cannot function in WIN10 version V1703.
3. Display setting:
a. The display resolution is set to 3840x2160 , and HDR is preset to ON.
b. After entering an application, the best HDR effect can be achieved when the resolution is changed to 3840x2160 (if
available).

13
Adjusting
Hotkeys
1 Source/Exit
2 Game Mode/<
3 Dial Point/>
4 Menu/Enter
5 Power
Power
Press the Power button to turn on the monitor.
Menu/Enter
When there is no OSD, Press to display the OSD or conrm the selection.
Game Mode/<
When there is no OSD, press ”<” key to open game mode function, then press ”<” or “>” key to select game mode (FPS,
RTS, Racing, Gamer 1, Gamer 2 or Gamer 3) basing on the different game types.
Dial Point/>
When there is no OSD, press Dial Point button to show / hide Dial Point.
Source/Exit
When the OSD is closed, press Source/Exit button will be Source hot key function.
When the OSD is closed, press Source/Auto/Exit button continuously about 2 second to do auto congure (Only for the
models with D-Sub).

14
OSD Setting
Basic and simple instruction on the control keys.
Luminance Color Setup Picture Boost OSD Setup ExitExtra
Contrast 50
Brightness 70
Eco Mode Standard
Gamma Gamma 1
DCR Off
HDR Mode Off
Game Setting
PIP Setting
PIP
1). Press the Menu-button to activate the OSD window.
2). Press Left or Right to navigate through the functions. Once the desired function is highlighted, press the
Menu-button to activate it, press Left or Right to navigate through the sub-menu functions. Once the desired
function is highlighted, press Menu-button to activate it.
3). Press Left or to change the settings of the selected function. Press to exit. If you want to adjust any other
function, repeat steps 2-3.
4). OSD Lock Function: To lock the OSD, press and hold the Menu-button while the monitor is off and then press
power button to turn the monitor on. To unlock the OSD - press and hold the Menu-button while the monitor is off
and then press power button to turn the monitor on.
Notes:
1). If the product has only one signal input, the item of “Input Select” is unable to be adjusted.
2). DCR, Color Boost and Picture Boost, for these states that only one state can exist

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Luminance
Luminance Color Setup Picture Boost OSD Setup ExitExtra
Contrast 50
Brightness 70
Eco Mode Standard
Gamma Gamma 1
DCR Off
HDR Mode Off
Game Setting
PIP Setting
PIP
Contrast 0-100 Contrast from Digital-register.
Brightness 0-100 Backlight Adjustment
Eco mode
Standard Standard Mode
Text Text Mode
Internet Internet Mode
Game Game Mode
Movie Movie Mode
Sports Sports Mode
Reading Reading Mode
Uniformity Uniformity Mode
Gamma
Gamma1 Adjust to Gamma 1
Gamma2 Adjust to Gamma 2
Gamma3 Adjust to Gamma 3
DCR
Off Disable dynamic contrast ratio
On Enable dynamic contrast ratio
HDR
Off
Set the HDR prole according to your usage
requirements.
Note:
When HDR is detected, the HDR option is
displayed for adjustment.
DisplayHDR
HDR Picture
HDR Movie
HDR Game
HDR Mode
OFF
Adjust HDR Mode.
HDR Picture
HDR Movie
HDR Game
Note:
When “HDR Mode” is set to a non off state, the “Contrast”, “Brightness Prole”, and “Gamma” items cannot be adjusted.

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When “HDR” is set to a non off state, the “Contrast”, “Brightness”, “Brightness Prole”, “Gamma”, and “DCR” items
cannot be adjusted.

17
Color Setup
Picture Boost OSD Setup ExitExtra
Luminance
Red 50
Green 50
Blue 50DCB Demo Off
Color Temp. Warm
DCB Mode Off
Color Setup
Game Setting
PIP Setting
PIP
Color Temp.
Warm Recall Warm Color Temperature from EEPROM.
Normal Recall Normal Color Temperature from EEPROM.
Cool Recall Cool Color Temperature from EEPROM.
sRGB Recall SRGB Color Temperature from EEPROM.
User
Red Gain from Digital-register
Green Gain Digital-register.
Blue Gain from Digital-register
DCB Mode
Full Enhance Disable or Enable Full Enhance Mode
Nature Skin Disable or Enable Nature Skin Mode
Green Field Disable or Enable Green Field Mode
Sky-blue Disable or Enable Sky-blue Mode
Auto Detect Disable or Enable AutoDetect Mode
OFF Disable or Enable OFF Mode
DCB Demo on or off Disable or Enable Demo
Red 0-100 Red gain from Digital-register.
Green 0-100 Green gain from Digital-register.
Blue 0-100 Blue gain from Digital-register.
Note:
When “HDR Mode” under “Brightness” is set to a non-off state, all items under “Color Settings” cannot be adjusted.

18
Picture Boost
OSD Setup ExitExtra
Luminance
Brightness 50
Contrast 50
H. Position 0
V. Position 0
Bright Frame Off
Frame Size 14
Picture Boost Color Setup
Game Setting
PIP Setting
PIP
Bright Frame on or off Disable or Enable Bright Frame
Frame Size 14-100 Adjust Frame Size
Brightness 0-100 Adjust Frame Brightness
Contrast 0-100 Adjust Frame Contrast
H. position 0-100 Adjust Frame horizontal Position
V. position 0-100 Adjust Frame vertical Position
Note:
1). For a better viewing experience, adjust the brightness, contrast, and position of the brightening.
2). When the „HDR Mode“ under „Brightness“ is set to a non-off state, all items under „Window Brightening“ cannot be
adjusted.