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34” Class 21:9 UltraWide® IPS Monitor (34.0" Diagonal)

  • 34UM65-P

Key Features

  • UltraWide® 21:9
  • Mac® Compatible
  • sRGB 99%
  • 4-Screen Split
5M:1 Dynamic Contrast Ratio

5M:1 Dynamic Contrast Ratio

A dynamic contrast ratio of 5,000,000:1 is your assurance of strong video performance, with deep blacks, bright whites and pleasing colors.

UltraWide 21:9

UltraWide® 21:9

The UltraWide 21:9 aspect ratio makes movies and games more immersive than ever. Need to get some work done, too? All of that UltraWide real estate makes it easy to view multiple documents at the same time, so you don't need to flip back and forth between them.

Mac® Compatible

Mac® Compatible

Graphic designers will surely appreciate the many features of LG's Mac®-compatible UltraWide monitor. The 21:9 widescreen and 4-Screen Split will simplify working with multiple graphics windows. Disclaimer: Mac is a trademark of Apple Inc., registered in the U.S. and other countries.

sRGB 99%

sRGB 99%

sRGB is the standard color space of ideal color reproduction. So, with over 99% coverage of the sRGB spectrum, this LG monitor is a great solution for professional photographers, graphic designers or anyone looking for highly accurate color.

*Disclaimer: Color mode conversion between Adobe RGB and sRGB is available on the "Color Mode" menu.

4-Screen Split

4-Screen Split

Multitasking doesn't have to mean shuffling back and forth between windows. With a single click, the 4-Screen Split feature divides the screen into as many as four customizable segments, two-by-two. Now you can see four different windows at the same time.

Disclaimer: *Screen Split software runs on Windows Vista/7/8 and Mac OS.

Dual Linkup

Dual Linkup

The Dual Linkup feature allows two compatible portable devices--such as a computer, camera, phone, or Blu-ray player--to be connected to the monitor, and both can be viewed on the same screen simultaneously.



IPS (In-Plane Switching) technology enhances the performance of liquid crystal displays. Response times are shortened, color reproduction is improved, and users can now view the screen at virtually any angle.

Full HD 1080p Resolution

Full HD 1080p Resolution

This stunning picture is the reason you wanted HDTV in the first place. With almost double the pixel resolution, Full HD 1080p gives it superior picture quality over standard HDTV. You’ll see details and colors like never before.

ENERGY STAR® Qualified

ENERGY STAR® Qualified

Earning the ENERGY STAR® rating means that a product meets strict energy efficiency guidelines set by the US Environmental Protection Agency and the Department of Energy. For monitors, it means they save energy both in standby and active (powered on) modes. ENERGY STAR-qualified monitors use about 25% less energy than standard units.

Screen Size 34"
Screen Size Class (diagonal) 34" Class (34.0" diagonal)
Panel Type IPS - LED
Aspect Ratio 21:9
Resolution 2560 x 1080
Color Gamut sRGB (100%)
Brightness (cd/m2) 300 cd/m2 (Center, 1 point)
Contrast Ratio(Original) 1000:1
Response Time 14ms
Viewing Angle (CR≥10) R/L 178 (Typ.), U/D178 (Typ.)
Panel Surface Hard Coating, 3H
Headphone Out 1
Display Port 1
ENERGY STAR® Qualified Yes
Type Adapter
Input 100~240V
PC Yes (Wide, Original, Cinema1, Cinema2, 1:1)
Auto Resolution Yes
Plug & Play Yes
sRGB Yes
Sound Yes
Screen-split Yes (S/W)
PBP (Picture by Picture) Yes
TCO6.x TC06.0
UL(cUL) Yes
CB Yes
KC Yes
Windows 8 Yes
VESA® Size (mm) 75 x 75
Power Cord 1
Detachable Base Yes
Tilt (angle) -5~20 Degree
Stand Body Cover 1
Limited Warranty 1 Year Parts & Labor

What People Are Saying

Rated 2 out of 5 by from Adapter fail. I purchased this monitor with my new intel i7 NUC, which only features a DisplayPort in. As this monitor only has HDMI out, I had to buy an adapter however due to this, I can only reach a 1980x1080 resolution. The native resolution of 2580x1080 will only work in safe mode. There are multiple forums where people refer to this issue.
Date published: 2016-01-19
Rated 3 out of 5 by from Great monitor with one problem So I have had this monitor for about 3 months when it started developing a vertical line from the top to the bottom of the monitor. It is about 1/3 of the way over from the left side and at first it would appear randomly then disappear. Then it would stay there for longer, and longer. I found if I pressed on the bezel below the line it would go away for awhile, then come back. Now even pressing on the bezel does nothing. It's extremely annoying for everything. Movies, websites, games, spreadsheets, etc. are frustrating to view. On the up side, before this the monitor has great color, good viewing angles, great for gaming, and I feel is a good value, unless you get a defective one like mine. Now I am waiting on LG's customer service to decide if they can find a repair place where I live or how they will handle it. Whether I would recommend this monitor depends on how well they fix this problem.
Date published: 2015-12-04
Rated 1 out of 5 by from PROBLEME WITH MACBOOK PRO INCOMPATIBLE With MBP 2012 no resolution 2580x1080
Date published: 2015-10-06
Rated 5 out of 5 by from Great product When I saw this in the Best Buy showroom I was hesistant to get this product, thinking this can't be good. After some site surfing in the store, and a great deal, I bought it. The brilliance is consistent with all programs, sites, audio and visual. We use tablets and docking stations, and this solved our problem of two monitor hookups with a single output very nicely. Great deal, excellent product.
Date published: 2015-05-09
Rated 4 out of 5 by from Great for multitasking Great monitor for multitasking. I use it with the screen split in two connected to my MacBook Air. I have two browsers open at the same time side by side, for two different aspects of my two jobs.
Date published: 2015-05-07
Rated 5 out of 5 by from Right source for today's intellegent consumer Coming from a retired motion picture/television (analog) technology background - this 21:9 ultra wide format is a step forward in the right direction as an alternative if your creative purpose is graphic arts, photo editing or video streaming TV cable programs i.e. Net-Flix, Hulu Plus, Google View, etc (as a frugal economic prospective). However the 1080 X 2560 resolution could be better served at 1440 X 2560 to round this monitor out to near perfection, with it's inherent realistic color depiction, which it has right out of the box.
Date published: 2015-05-03
Rated 5 out of 5 by from Different and Great!! The overall quality of this monitor is great. It is different from what is out there in the market. The software that comes with the monitor is very easy to install on any PC or Mac. Once you install the software, you have many sizing options for your screen. I personally like the split screen. I can do work on one and see the news on the other. The image quality is crisp and detailed. I am thinking of upgrading to the next model up because of how great this one turned out to be. Thanks LG!
Date published: 2015-04-29
Rated 5 out of 5 by from GREAT PRODUCT This the best monitor I ever owned very clear and easy on the eyes very easy to operate
Date published: 2015-04-03
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We're here to support you with our product.

View 34UM65-P Product Support

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Ask your questions. Share your answers.
Please first review the detailed product information and help guides in the Product Support section for this product prior to posting a question.

Hi! I just bought this monitor. I want to play csgo with this but as much as I'am trying to make good setup it's not working. I was wondering can anybody tell me how to do it right. Thanks.

Asked by: Vabubi
Our offices, in the United States, do not have product information for Lithuania. In order to obtain such information, it is recommended to check our subsidiary’s website, at
Answered by: NeilE
Date published: 2016-01-26

is there anyone else who has a green line down one side of their monitor? I am out of warranty now and was wandering if there was a fix for it.

Asked by: MonitorMatt
We regret the inconvenience you have experienced with this monitor. A green line on the screen can be caused by either one of the video boards or by the panel itself, or possibly another related component. The unit will likely require service. To make service arrangements, you may either contact our Customer Interactive Center at 800-243-0000, or you can check our Repair Provider Lookup on our website, at
Answered by: NeilE
Date published: 2015-12-21

Is this monitor compatible with Windows 10?

Asked by: Walter153
LGJoel, I had heard that it will be Win10 compatible or that new drivers will be released by LG in October. I agree that it _should_ be class compliant, however my audio stopped working over MiniDisplayPort as soon as I upgraded to Windows 10. Can you tell us if there is anything new on LG's front to support audio over MiniDP with Windows 10, or what other configurations might be necessary? Thanks!
Answered by: c016smith
Date published: 2015-10-16

Hi I have a Mac book pro using a software switch ResX to get the resolution I need, but after el Capitan update I am no able to get the resolution so is there a way to get from you the timing parameters (or if you are able to tell me how to get this)

Asked by: Aargenis
The only information available with regards to HDMI Timing for video is tabulated on page 41 of the owner's manual for the ENERGY STAR® Qualified LG 25” Class 21:9 UltraWide™ IPS Monitor (25.0" Diagonal), Model # 25UM65-P. If you are unable to get the resolution you need, you may need to check the GPU in your Mac Book Pro and see if it has a scaling option or contact the GPU's manufacture for the timing parameters...^IFV
Answered by: LGJoel
Date published: 2015-11-23

Will the Screnn Split works with newly released Microsoft Windows 10?

Asked by: John1v
We regret the inconvenience you have experienced with this monitor. This model was designed to operate with up to Windows 8. We do not have drivers available for Windows 10 operations. If the Operating System does not have appropriate drivers installed, then the monitor may not operate properly.
Answered by: NeilE
Date published: 2016-01-31

Where is the power button located?

Is the power button under the bezel below the LG symbol or on the front of the bezel under the LG symbol? Or is it located somewhere else. I cannot tell from the pictures.
Asked by: Ohioman
In the middle at the bottom os the screen on the LG 25” Class 21:9 UltraWide™ IPS Monitor (25.0" Diagonal), Model # 25UM65-P is a joystick button that has the Power On/Off and Volume controls on it...^IFV
Answered by: LGJoel
Date published: 2015-11-28

gaming details

what is the refresh rate on this monitor? i want to get around 120fps and i dont believe that is possible on a monitor with less than 120hz. also is it hard to set up multiples of these monitors?
Asked by: Garfunkle13
The LG 25” Class 21:9 UltraWide™ IPS Monitor (25.0" Diagonal), Model # 25UM65-P is 2560 x 1080 @ 60Hz. If by "multiples" you are inquiring about Screen Split, there is a Software CD that is packaged with the unit that allows you to install LG Software Monitor for the Screen Split program which automatically splits the program window as desired...^IFV
Answered by: LGJoel
Date published: 2015-07-13

RE 34UM65-P, Can you split the screen(PBP) other than 50/50?

We are using the screen for a Oral surgery. We'd like to use the PBP to split the screen say 60/40 or 70/30 to show the xray on the left and the Vitals monitor on the right. Is this possible? We only seem to be able to get a 50/50 split. Thank you in advance for your assistance. Brian
Asked by: Bj440
We appreciate your interest in this 34” monitor and its capabilities. This unit is designed for operations with a 50/50 split screen. It does not have the capabilities for adjusting the pictures sizes further.
Answered by: NeilE
Date published: 2015-05-27
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