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Better OLED Gaming TV: LG BX vs. LG CX vs. LG GX?

LG has three similar OLED television sets with the BX, CX and GX. So, which of these provides the best gaming experience for playing videogames on the PlayStation 5, Xbox Series S, Xbox Series X as well as other consoles? You can find out in this comparison guide.

Quick Summary

When compared to the LG BX and LG GX, the LG CX has the highest HDR brightness levels. All three television sets support a wide color gamut, Dolby Vision and HDR10 (but not HDR10+).

When it comes to input lag, the GX has the lowest latency in most display settings. With that said, the differences between these three TVs are so negligible as you won’t notice any differences when playing a game. All three TV sets support HDMI 2.1, up to 120 frames per second, variable refresh rate, FreeSync and GSYNC.

Overall, we recommend getting the CX over the BX and GX due to the better HDR brightness levels. If you are interested, you can purchase any of the aforementioned televisions on Amazon with the following links:

LG BX vs. LG CX vs. LG GX Comparison Chart

 LG BX 4K Smart OLED TV LG CX 4K Smart OLED TV LG GX 4K Smart OLED TV
Screen Sizes

55” LG BX: OLED55BXPUA

65” LG BX: LG BX OLED65BXPUA
48” LG CX: OLED48CXPUB

55” LG CX: OLED55CXPUA

65” LG CX: OLED65CXPUA

77” LG CX: OLED77CXPUA
55” LG GX: OLED55GXPUA

65” LG GX: OLED65GXPUA
HDMI Ports HDMI Port #1: HDMI 2.0

HDMI Port #2: HDMI 2.0

HDMI Port #3: HDMI 2.1

HDMI Port #4: HDMI 2.1
HDMI Port #1: HDMI 2.1

HDMI Port #2: HDMI 2.1

HDMI Port #3: HDMI 2.1

HDMI Port #4: HDMI 2.1
HDMI Port #1: HDMI 2.1

HDMI Port #2: HDMI 2.1

HDMI Port #3: HDMI 2.1

HDMI Port #4: HDMI 2.1
Dolby Vision?YesYesYes
HDR10?YesYesYes
HDR10+?NoNoNo
Wide Color Gamut?YesYesYes
HDR Real Scene Peak Brightness 454 nits685 nits662 nits
HDR Peak 2% Window 454 nits799 nits746 nits
HDR Peak 10% Window542 nits813 nits744 nits
HDR Peak 25% Window 386 nits456 nits432 nits
HDR Peak 50% Window 231 nits302 nits285 nits
HDR Peak 100% Window 128 nits146 nits139 nits
HDR Sustained 2% Window 436 nits752 nits711 nits
HDR Sustained 10% Window 517 nits775 nits712 nits
HDR Sustained 25% Window 364 nits433 nits409 nits
HDR Sustained 50% Window 220 nits287 nits270 nits
HDR Sustained 100% Window 122 nits140 nits133 nits
HDR ABL 0.0930.1040.104
Native Refresh Rate 120Hz120Hz120Hz
Variable Refresh Rate?YesYesYes
FreeSync?YesYesYes
GSYNC?YesYesYes
Input Lag at 1080p/60Hz with Game Mode 15.0 ms14.1 ms13.6 ms
Input Lag at 1080p/120Hz with Game Mode 5.9 ms7.4 ms7.0 ms
Input Lag at 1080p/Variable Refresh Rate 5.9 ms6.4 ms5.8 ms
Input Lag at 1440p/60Hz with Game Mode 14.8 ms14.3 ms13.5 ms
Input Lag at 1440p/120Hz with Game Mode 5.7 ms7.4 ms7.0 ms
Input Lag at 1440p/Variable Refresh Rate 6.2 ms6.7 ms6.1 ms
Input Lag at 4K/60 Hz with Game Mode 14.5 ms14.1 ms13.6 ms
Input Lag at 4K/60 Hz/10-bit HDR with Game Mode 14.5 ms14.1 ms13.6 ms
Input Lag at 4K/120 Hz with Game Mode 11.6 ms11.6 ms11.1 ms
Input Lag at 4K/Variable Refresh Rate 11.1 ms11.6 ms11.1 ms
Input Lag at 4K/60 Hz/4:4:4 14.6 ms14.1 ms13.6 ms
Input Lag at 1080p/60 Hz without Game Mode 106.1 ms97.5 ms97.1 ms
Input Lag at 4K/60 Hz without Game Mode 94.1 ms97.5 ms97.0 ms
Input Lag at 4K/60 Hz with Interpolation 85.8 ms93.4 ms92.9 ms
Composite Input?Yes via included adapterYes via included adapterYes via included adapter
Antenna/Cable Input?YesYesYes
PricingCheck price on Amazon.Check price on Amazon.Check price on Amazon.

Screen Sizes

The LG BX, LG CX and LG GX are available in 55-icnh and 65-inch screen sizes. The CX model is also available in two extra screen size options: 48-inch and 77-inch. You can take a look the model numbers for each size below:

  • 55” LG BX: OLED55BXPUA
  • 65” LG BX: LG BX OLED65BXPUA
  • 48” LG CX: OLED48CXPUB
  • 55” LG CX: OLED55CXPUA
  • 65” LG CX: OLED65CXPUA
  • 77” LG CX: OLED77CXPUA
  • 55” LG GX: OLED55GXPUA
  • 65” LG GX: OLED65GXPUA

HDMI Ports

The LG BX comes with four HDMI ports, port #1 and port #2 of which are HDMI 2.0 while port #3 and port #4 are HDMI 2.1. All four HDMI ports of the LG CX and LG GX are HDMI 2.1.

Dolby Vision

All three television sets in this versus guide support Dolby Vision. Both the Xbox Series S and Xbox Series X will be using this HDR feature for videogames.

HDR10

The TVs also support HDR10.

HDR10+

The LG BX, CX and GX do not support HDR10+ contents however.

Wide Color Gamut

All of the televisions in this comparison use a wide color gamut.

The LG BX 4K Smart OLED TV on Amazon.

HDR Brightness Levels

When it comes to high dynamic range brightness, the LG CX 4K Smart OLED TV holds a slight edge over the LG GX 4K Smart OLED TV. The LG BX 4K Smart OLED TV is noticeably dimmer than the other two televisions.

To really highlight HDR, we recommend TVs that are capable of producing 500 nits of brightness. According to tests done by RTINGS, the BX is only able to reach this threshold at Peak 10% Window and Sustained 10% Window.

The CX can reach at least 500 nits at Real Scene Peak Brightness, Peak 2% Window, Peak 10% Window, Sustained 2% Window and Sustained 10% Window.

The GX can reach this threshold at Real Scene Peak Brightness, Peak 2% Window, Peak 10% Window, Sustained 2% Window and Sustained 10% Window.

All three LG OLEDs do struggle with brightness levels in larger bright scenes at Peak 25% Window, Peak 50% Window, Peak 100% Window, Sustained 25% Window, Sustained 50% Window and Sustained 100% Window.

You can take a look at the RTINGS HDR brightness level test results for the BX, CX and GX below:

HDR Real Scene Peak Brightness

  • BX: 454 nits
  • CX: 685 nits
  • GX: 662 nits

HDR Peak 2% Window

  • BX: 454 nits
  • CX: 799 nits
  • GX: 746 nits

HDR Peak 10% Window

  • BX: 542 nits
  • CX: 813 nits
  • GX: 744 nits

HDR Peak 25% Window

  • BX: 386 nits
  • CX: 456 nits
  • GX: 432 nits

HDR Peak 50% Window

  • BX: 231 nits
  • CX: 302 nits
  • GX: 285 nits

HDR Peak 100% Window

  • BX: 128 nits
  • CX: 146 nits
  • GX: 139 nits

HDR Sustained 2% Window

  • BX: 436 nits
  • CX: 752 nits
  • GX: 711 nits

HDR Sustained 10% Window

  • BX: 517 nits
  • CX: 775 nits
  • GX: 712 nits

HDR Sustained 25% Window

  • BX: 364 nits
  • CX: 433 nits
  • GX: 409 nits

HDR Sustained 50% Window

  • BX: 220 nits
  • CX: 287 nits
  • GX: 270 nits

HDR Sustained 100% Window

  • BX: 122 nits
  • CX: 140 nits
  • GX: 133 nits

HDR ABL

  • BX: 0.093
  • CX: 0.104
  • GX: 0.104
The LG CX 4K Smart OLED TV on Amazon.

Native Refresh Rate

The LG BX, LG CX and LG GX come with a 120 Hz refresh rate. As all three televisions also support HDMI 2.1, you will be able to play games at up to 120 frames per second on the PlayStation 5, Xbox Series S and Xbox Series X.

Variable Refresh Rate

The BX, CX and GX also support variable refresh rate, a feature that prevent PS5, XSS and XSX games with inconsistent frame rates from hitching and screen tearing.

FreeSync Support

The three LG TV sets in this comparison are compatible with the FreeSync feature of AMD graphics cards when playing PC games.

GSYNC Support

The televisions also support the GSYNC feature of NVIDIA graphics cards when playing video games on a PC.

Input Lag

When it comes to input lags, the BX, CX and GX are extremely similar. We recommend latency of less than 30 ms to get a good gaming experience and all three television sets are able to achieve this threshold easily.

According to the tests done by RTINGS, the BX has the edge over the competition at 1080p/120Hz with Game Mode and 1440p/120Hz with Game Mode.

The GX has the advantage over the other two TVs at 1080p/60Hz with Game Mode, 1080p/Variable Refresh Rate, 1440p/60Hz with Game Mode, 1440p/Variable Refresh Rate, 4K/60 Hz with Game Mode, 4K/60 Hz/10-bit HDR with Game Mode, 4K/120 Hz with Game Mode and 4K/60 Hz/4:4:4.

The BX and GX are tied when it comes to the lowest input lag at 4K/Variable Refresh Rate.

With that said, the differences between the three LG OLED TVs are so negligible that you won’t notice the difference when playing a videogame.

You will be using the 4K/60 Hz, 4K/120 Hz and 4K/Variable Refresh Rate when playing PlayStation 4 Pro, Xbox One X, PlayStation 5, Xbox Series X games.

The 1440p/60Hz, 1440p/120Hz and 1440p/Variable Refresh Rate display modes will be used by the Xbox One X, Xbox Series S and Xbox Series X.

The older HDMI consoles (PS3, PS4, Xbox 360, Xbox One, Xbox One S, Wii U and Switch) will be using 1080p/60Hz, 1080p/120Hz and 1080p/Variable Refresh Rate.

You can use any of the aforementioned display settings when playing PC games in addition to 4K/60 Hz/4:4:4.

You can find RTINGS input lag test results for the BX, CX and GX below:

Input Lag at 1080p/60Hz with Game Mode

  • BX: 15.0 ms
  • CX: 14.1 ms
  • GX: 13.6 ms

Input Lag at 1080p/120Hz with Game Mode

  • BX: 5.9 ms
  • CX: 7.4 ms
  • GX: 7.0 ms

Input Lag at 1080p/Variable Refresh Rate

  • BX: 5.9 ms
  • CX: 6.4 ms
  • GX: 5.8 ms

Input Lag at 1440p/60Hz with Game Mode

  • BX: 14.8 ms
  • CX: 14.3 ms
  • GX: 13.5 ms

Input Lag at 1440p/120Hz with Game Mode

  • BX: 5.7 ms
  • CX: 7.4 ms
  • GX: 7.0 ms

Input Lag at 1440p/Variable Refresh Rate

  • BX: 6.2 ms
  • CX: 6.7 ms
  • GX: 6.1 ms

Input Lag at 4K/60 Hz with Game Mode

  • BX: 14.5 ms
  • CX: 14.1 ms
  • GX: 13.6 ms

Input Lag at 4K/60 Hz/10-bit HDR with Game Mode

  • BX: 14.5 ms
  • CX: 14.1 ms
  • GX: 13.6 ms

Input Lag at 4K/120 Hz with Game Mode

  • BX: 11.6 ms
  • CX: 11.6 ms
  • GX: 11.1 ms

Input Lag at 4K/Variable Refresh Rate

  • BX: 11.1 ms
  • CX: 11.6 ms
  • GX: 11.1 ms

Input Lag at 4K/60 Hz/4:4:4

  • BX: 14.6 ms
  • CX: 14.1 ms
  • GX: 13.6 ms

Input Lag at 1080p/60 Hz without Game Mode

  • BX: 106.1 ms
  • CX: 97.5 ms
  • GX: 97.1 ms

Input Lag at 4K/60 Hz without Game Mode

  • BX: 94.1 ms
  • CX: 97.5 ms
  • GX: 97.0 ms

Input Lag at 4K/60 Hz with Interpolation

  • BX: 85.8 ms
  • CX: 93.4 ms
  • GX: 92.9 ms
The LG GX 4K Smart OLED TV on Amazon.

Composite Input

The three televisions include an adapter where you can convert the red, white and yellow composite inputs into a singular yellow input. As a result, you will be able to plug in your PS1, PS2, Nintendo 64, Nintendo Gamecube, Wii and Xbox.

Antenna/Cable Input

The LG BX 4K Smart OLED TV, LG CX 4K Smart OLED TV and LG GX 4K Smart OLED TV come with an antenna/cable input as you will be able to directly connect your Sega Genesis, Super Nintendo, NES and other retro systems.

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