10 views 0 comments

LG OLED GX vs OLED CX Review (OLED55GX vs OLED55CX, OLED65GX vs OLED65CX, OLED77GX vs OLED77CX)

by on October 13, 2020
 



LG OLED GX vs OLED CX Review

LG OLED GX is the newest model or the 2020 model of LG OLED TV G series. But even so, unlike in previous years where the LG OLED G Series came with “Picture on Glass” design, after it absent in last year, in this year, it came with new concept of design, which is “Gallery” design.  In 2020 lineup, it sits between the LG WX and CX. On the other hand, LG CX is the mid-range of LG’s 2020 OLED TVs lineup, sits between the lowest model OLED BX and OLED GX. In last year, there actually is E Series, but in this year, the E series seems not released. You need to know, although LG GX and CX come on to different class, but they are powered by the same technology and use the OLED panels which have the same technical platform.

In the market, the LG GX comes in 3 variants of screen size including 55 inches (OLED55GXPUA), 65 inches (OLED65GXPUA), and 77 inches (OLED77GXPUA).  On the other hand, the LG CX comes in one more variant. IN addition to 55 inches (OLED55CXPUA), 65 inches (OLED65CXPUA), and 77 inches (OLED77CXPUA), it also comes in 48 inches (OLED48CXPUB), the smallest commercial OLED TVs that’s ever. Meanwhile, although they are powered by the same technologies and features, with the same screen size (OLED55GXPUA vs OLED55CXPUA, OLED65GXPUA vs OLED65CXPUA, OLED77GXPUA vs OLED77CXPUA), the LG GX is priced hundreds dollar more expensive than the LG CX. So, what are their differences and which is a better choice between them?

LG OLED GX vs OLED CX Short Review

LG OLED CX vs OLED GX Key Specification

Specs and Features LG OLED GX LG OLED CX
Resolution 4K (2160 x 3840) 4K (2160 x 3840)
Screen Type Flat Flat
Screen Sizes Available 55 Inches (OLED55GXPUA), 65 Inches (OLED65GXPUA), 77 inches (OLED77GXPUA) 48 Inches (LG OLED48CXPUB, 55 Inches (OLED55CXPUA), 65 Inches (OLED65CXPUA), 77 inches (OLED77CXPUA)
Panel Type OLED OLED
Dimming Pixel Level Dimming Pixel Level Dimming
Picture on Glass design Yes Yes
Picture Engine Alpha 9 Gen 3 Processor Alpha 9 Gen 3 Processor
4K Up-scaling AI Up scaling AI Up scaling
HDR Format Supports Dolby Vision, HDR10, HLG Dolby Vision, HDR10, HLG
Dolby Vision IQ Yes Yes
HDR Enhancement 4K Cinema HDR, HDR Dynamic Tone Mapping Pro, Dolby Vision IQ 4K Cinema HDR, HDR Dynamic Tone Mapping Pro, Dolby Vision IQ
Contrast Enhancement Object Depth Enhancer, Ultra Luminance Pro, Face Enhancing Object Depth Enhancer, Ultra Luminance Pro, Face Enhancing
Color Enhancement Intense Color, Billion Rich Colors, Advanced Color Enhancer, True Color Accuracy Pro, 4 Colors Sub Pixel Intense Color, Billion Rich Colors, Advanced Color Enhancer, True Color Accuracy Pro, 4 Colors Sub Pixel
Clarity Enhancement Quad Step Noise Reduction, Frequency Based Sharpness Enhancer Quad Step Noise Reduction, Frequency Based Sharpness Enhancer
Motion Enhancement OLED Motion Pro OLED Motion Pro
Refresh Rate Panel Native 120 Hz Native 120 Hz
Variable Refresh Rate Support HDMI Forum VRR, G-Sync (NVidia Certified), FreeSync is on a future firmware update, HGiG HDMI Forum VRR, G-Sync (NVidia Certified), FreeSync is on a future firmware update, HGiG
Platform WebOS 5 WebOS 5
AI TV (Artificial Intelligence) LG ThinQ AI, Google Assistant, Google Home, Amazon Alexa, Intelligence Voice Recognition, AI Picture Pro, AI Sound Pro, AI Brightness, Apple AirPlay 2, Apple Home Kit LG ThinQ AI, Google Assistant, Google Home, Amazon Alexa, Intelligence Voice Recognition, AI Picture Pro, AI Sound Pro, AI Brightness, Apple AirPlay 2, Apple Home Kit
LG Magic Remote 2020 model 2020 model
HDMI 4 4
HDMI Supports HDMI 2.1 (All), HDMI 2.0 Full bandwidth (All), HDCP 2.2 (All), ARC (HDMI 2), eARC (HDMI 2) HDMI 2.1 (All), HDMI 2.0 Full bandwidth (All), HDCP 2.2 (All), ARC (HDMI 2), eARC (HDMI 2)
USB 3 3
Ethernet 1 1
RF (Terrestrial Cable) 1 1
Composite In (AV) 1 1
Component In No No
Wi-Fi Built In 802.11ac 802.11ac
Bluetooth Support Version 5.0 Version 5.0
Channel 4.2 Channel 2.2 Channel
Total Audio Output 60 Watt(WF : 20 Watts) 40 Watt(WF : 20 Watts)
Dolby Atmos Support Yes Yes

Technologies and Features LG OLED GX and OLED CX

The Differences

Design

One of the major differences between the LG OLED GX and OLED CX is their design. As we have mentioned above, the LG OLED GX comes with a unique “Galley” design. By default, it comes with LG’s Flush Wall Mount instead of a stand. Meanwhile, if you want to place it above the table, you must buy feet separately. The TV is very thin, only around 2.4 cm and its thickness is uniform throughout its sides. To make it look like a picture frame, the TV is designed in such away in order to it can sit flush against the wall. In general, the design of the LG GX is excellent.

On the other hand, the LG CX also has excellent design. But it doesn’t have unique design like the LG GX. Just like the OLED C9 predecessor, it also comes with a sleek design with a premium feel to it. The back is also made from silver metal, but it is a bit darker than the predecessor. To support it on the table, it comes with the same stand found on the LG C9 where it is very solid and its width is almost as wide as the TV, making the TV doesn’t wobble all that much. The TV is also very thin, but not as thin as the LG GX where it has a thickness of around 5 cm. If the thickness of the LG GX is uniform, the LG OLED CX get thicker at the bottom where all of the inputs are housed.

Speaker System

As we see on comparison table above, the other main difference between the LG OLED CX and OLED GX is about the speaker system integrated. The LG OLED GX has 4.2 channel speaker systems with total sound output of 60 watts (20 watts (woofer) while the OLED CX has 2.2 channel speaker systems with total sound output of 40 watts (20 watts Woofer). Expected, with 4.2 channel speaker system, the LG GX is able to bring more powerful surround sound than the LG CX that only has 2.2 channels speaker system. But keep in mind, this is not final. You can easily to improve their sound performance by buying sound bar separately.

The Similarities

Panel Technology

Although the LG OLED GX is sold hundreds dollar more expensive, but they use the OLED panels which have the same technical platform. Except panel variance, their performance that is influenced by their panel performance is almost the same. As we have known, OLED panel has self lighting pixel that can switch on/off/dim individually. This means, each of its pixels can emit its own light, so it doesn’t need a backlight. Since it can switch on/off/dim individually, this allows the OLED panel has pixel dimming level, equal to the LED TV with Full Array local dimming that has the number of dimming zones equal to the number of pixels. Meanwhile, to boost its brightness level, the LG’s OLED panel has WRGB pixel structure where there is an additional white sub pixel. But you need to know, the use of white sub-pixel may make them can produce pure white, but it will de-saturate bright colors, making them cannot produce very bright saturated colors.

Images Processor

The LG OLED CX and OLED GX are also supported by the same image processor, which is Alpha 9 Gen 3 images processor, the third generation of Alpha 9 image processor. Compare to the predecessor Alpha 9 Gen 2, it offers improvements in some aspects like 4improvements in some aspects like 4K-Up-scaling Engine, Facial recognition, motion processing technology, multi-step noise reduction, pixel perfect blacks, color accuracy, etc. Additionally, just like the predecessor, this image processor is also able to provide some AI-related features like AI Brightness, AI Picture, and AI Sound. In general, their image processor is very powerful, more powerful than the predecessor Alpha 9 Gen 2.

HDR Support

Both of the LG GX and LG CX also support the same HDR formats. They both support HDR10, the most popular HDR format. Additionally, they both also support HLG (Hybrid Log Gamma), HDR format for TV broadcasting. They also support Dolby Vision, a proprietary HDR format by Dolby Laboratories. But unfortunately, they both don’t support HDR10+, an improvement of HDR10 format that already use dynamic metadata. The new feature that offered by the LG OLED CX and OLED GX is about Dolby Vision IQ. It is actually not new HDR format like HDR10+ over the HDR10. But this feature will optimize their Dolby Vision experience by raising and lowering the gamma and brightness level of the picture depending on the amount of ambient light it picks up. Regardless the picture setting you choose, this feature will automatically active. So, to get the advantage of this feature, you must turn on the LG’s AI Brightness and Dolby Vision Cinema Home mode.

Motion Technology

The LG OLED GX and OLED BX have the same native refresh rate panel, which is 120 Hz. This makes them support video content with frame rate of up to 120 Hz. Additionally, it also makes them can interpolate low frame rate content up to 120 Hz. Meanwhile, in addition they both have native 120 Hz refresh rate panel, they both also already support VRR (Variable Refresh Rate) technology.  Regardless the resolution, their refresh rate can range between 40 Hz – 120 Hz, depending on the content. Additionally, their VRR technology also already supports most of Gaming feature like FreeSync, GSync, HDMI Forum VRR, and HGIG. As we have known, VRR technology can improve their gaming experience, allowing you to play any game with screen tearing effect.

By default, unlike LED TV, to dim their screen, they both don’t use PWM Dimming System. This makes their screen is almost flicker-free that means it is good. But in certain condition, particularly when they are playing fast moving images, screen flicker is required to make motion look smoother. To support it, both of them have an optional BFI (Black Frame Insertion) Mode called OLED Motion Pro. Enable this BFI mode will make their screen flicker and they both support both 60 Hz and 120 Hz flicker. Regardless the setting of OLED Motion, enabling TruMotion will make their screen always flicker at 120 Hz. Meanwhile, set TruMotion to “User” and “OLED Motion” to “High” will make their screen flicker at 60 Hz.

Connectivity

The LG OLED CX and OLED GX are also equipped with the same connectivity. As their major connectivity, they both have 4 HDMI ports. What supported by their HDMI ports are also same where all of their HDMI ports support HDMI 2.0 Full bandwidth, HDCP 2.2, CEC, and ALLM (Auto Low Latency Mode). Additionally, one of their HDMI ports (HDMI 2) also already supports ARC and eARC. All of their HDMI ports actually also support HDMI 2.1, but not full bandwidth. Their HDMI ports only support 40 Gbps instead of 48 Gbps. This means, their HDMI ports is only able to reach 4K @120 10 bit, but still not capable to reach 12 bit. Nevertheless, expected, their difference is not too significant.

Additionally, they both also have 3 USB ports. But unfortunately, all of them are USB 2.0 and none of them are USB 3.0. But even so, although they both don’t support USB 3.0, the bandwidth of the USB 2.0 is wide enough to play most content via their USB ports.

In addition to HDMI and USB ports, they both have 1 Composite In (Include adapter), 1 RF IN (Antenna In), 1 Digital Audio Out (Optical), 1 Analog Audio Out (Min Jack 3.5 mm), and Ethernet port. To connect to the internet or other devices wirelessly, they both are also equipped with Built-In Wi-Fi and Bluetooth.

Check the Latest Price
LG OLED CX LG OLED GX
48 Inches LG OLED48CXPUB on Amazon
55 Inches LG OLED55CXPUA on Amazon LG OLED55GXPUA on Amazon
65 Inches LG OLED65CXPUA on Amazon LG OLED65GXPUA on Amazon
77 Inches LG OLED77CXPUA on Amazon LG OLED77GXPUA on Amazon

LG OLED GX vs OLED CX Performance

Black Level and Contrast

Just like other models of OLED TVS, both of the LG OLED CX and OLED GX has infinite native contrast ratio. This is due to their OLED panel doesn’t have backlight and can turn on/off individual pixels. So when they are showing black, there is no light emitted at all from black area. The result, black produced is nearly perfect. Not only that, their black uniformity is also nearly perfect. Combination of the nearly perfect black uniformity and black makes dark scene looks excellent on their screen. Black of images looks really black, even if they are set in very dark room. Additionally, their pixel dimming level also makes them can show small highlight in a dark scene with almost no blooming, making subtitle on movies look very focus.

The image is only an illustration

Winner: Draw

SDR Peak Brightness

The LG OLED CX has a bit brighter SDR peak brightness than the OLED GX. With real SDR content, the LG CX can hit around 320 nits while the LG GX hit around 290 nits. Both of them hit their highest peak brightness on 2% and 10% window (2% or 10% of screen is black while the rest is bright) where the OLED CX hit around 460 nits for a short time  and drop to around 440 nits after stabilized. On the other hand, the LG GX hit around 390 nits for a short time and around 370 nits after stabilized. The bright area increase, their peak brightness is dimmed by their ABL (Automatic Brightness Limiter). On 100% window, the ABL of LG CX is more aggressive where its peak brightness is dropped down to around 150 nits while the LG GX is dropped down to around 170 nits. With these statistics, they are not much different and overall, their SDR peak brightness is decent. As long as they are not set in a very bright room, their peak brightness is bright enough to combat the glare. And combine to their excellent reflection handling, the picture displayed on their screen look obviously when they are set in a moderately lit to dim room.

Winner: OLED CX

HDR Peak Brightness

With HDR content, they both can hit brighter peak brightness and just like with SDR content, the LG OLED CX also can get a bit brighter HDR peak brightness than the OLED GX. With real content, the LG OLED GX hit around 660 nits while the OLED CX hit around 680 nits. Meanwhile, they both hits their highest peak brightness is also on 2% and 10% window. For a short time, the LG CX can hit around 800 nits and drop to around 770 nits after stabilized. While LG GX hits around 750 nits for a short time and drop to around 710 nits after stabilized. To prevent from excessive power consumption, the larger area get bright, their peak brightness will be dropped by their ABL.  On 100% window, the peak brightness of the OLED CX drop to around 140 nits while the OLED GX drops to around 130 nits. Ignoring their difference, their HDR peak brightness is bright enough to show HDR images as bright they should be. They both are also able to bring out small highlight in HDR. But because their HDR peak brightness is still under 1000 nits, they both are not able to show HDR images at 1000-4000 nits like the content creator intended. For OLED TV, their HDR peak brightness is great, but still not as bright as premium LED TV like Samsung Q90 or Sony X950H.

Winner: OLED CX

Color Gamut and Color Volume

Just like other models of OLED TV, the LG OLED GX and OLED CX also has excellent color gamut. In DCI P3 color space, their color gamut coverage is nearly perfect which is around 97% in DCI P3 xy and 99% in DCI P3 uv for the LG CX and around 96% in DCI P3 xy and 98% in DCI P3 uv for the LG GX.  Meanwhile, In Rec.2020, their color gamut coverage is also good, which is around 72% in Rec.2020 xy and 76% in Rec.2020 uv for the OLED CX and around 71% in Rec.2020 xy and 75% in Rec.2020 uv for the LG GX. The LG OLED CX may have a bit wider color gamut than the OLED GX, but this is more due to panel variance and their difference doesn’t have a significant impact to the picture produced. And in general, their color gamut is really excellent and there are not many TVs that can match their color gamut.

Wide color gamut

Unfortunately, although they both have excellent color gamut, their color volume is only decent. This is due to they both cannot produce very bright saturated colors. As we have known, the use of white sub-pixel makes them can produce pure white, but on the other hand, this will de-saturates very bright colors, making them cannot produce very bright colors. But even so, at the bottom side, their color volume is excellent. Their infinite contrast ratio makes them can produce deep dark colors excellently. And overall, combination of their color gamut and color volume makes colors of most HDR images can be shown fairly accurate with vibrant color on their screen.

Winner: Draw

Color Gradient

10 bit color gradient

While they have similar color gamut and color volume, the color gradient of the LG OLED CX is better than the OLED GX. On the screen of the LG GX, there is a noticeable banding in certain colors, particularly in greens and grays. In blues and reds, there is also a bit banding. Meanwhile, on the screen of the LG CX, there is also still some banding in some certain colors, but not as noticeable as on the screen of the OLED GX. Nevertheless, overall, banding that may be noticeable doesn’t spoil the overall images produced and not be a serious problem. But even so, if you still feel bothered by banding that may be visible, enabling “Smooth Gradation” feature can help to reduce banding. And ignoring the advantage of the OLED CX than the OLED CX, overall, their color gradient actually is good.

Winner: OLED CX

Side Viewing Angle

OLED vs LED Side Viewing Angle

The image is only an illustration

If LED TVs that have good viewing angle usually has poor native contrast ratio or vice versa, both of the LG OLED GX and CX have both infinite contrast ratio and good side viewing angle. On their screen, black level and brightness level can be maintained up to around 70 degrees. So, even though you watch TV from the side, black and brightness level of the images displayed on their screen will look consistent. If viewed from the side, color accuracy of images may be still degraded and doesn’t look as accurate as when viewed from the center and front, but their performance in maintaining color accuracy when viewed from the side is still better than LED TVs. On their screen, color will start to shift at around 30 degrees and look washed out at around 50 degrees. But even so, in general, when viewed from the side, the picture displayed on their screen still look as well as when viewed from the center and front.  If you have a wide seating arrangement for watching TV, both of them are great for you.

Winner: Draw

Motion handling

Pixel response time is one of the main advantages of the OLED TVs including the LG OLED GX and OLED CX.  They both have nearly instantaneous pixel response time, much faster than the fastest response time reached by LED TVs. The result, when they are playing fast moving images like fast movies or fast sports, the picture displayed on their screen look very clear. Following fast moving objects, there is only a very short ghosting trail that should not be noticeable. But on the other hand, the nearly instantaneous response time can cause image appears stuttering, particularly when they are playing low frame rate content like 24p movies. But you need to worry because the image stuttering can be solved by enabling their BFI mode or Motion Interpolation. As we have discussed above, they both have 60 Hz and 120 Hz BFI mode that can help to improve motion appearance, making motion look smoother on their screen.

OLED vs LED TV Motion Blur

The image is only an illustration

When playing 24p movies, they both also can do a great job. No matter the source of the movies, they both can show them smoothly with judder-free. But even so, to remove judder completely with BFI enabled, their “OLED Motion” must be set to “Low”, “Medium” or “Auto”. Set their BFI to either cannot remove judder completely.

Winner: Draw

Input Lags

Since they both are powered by the same image processor, they have almost similar input lags and their input lags in Game Mode are great. With 60 fps content, regardless the resolution, their input lags are around 14 ms. Their input lags at 120 Hz is even faster, with 1080p and 1440p resolution, their input lags are around 7 ms and with 4K resolution, their input lag is around 11 ms. Additionally, their input lags with VRR enabled are also excellent, which are around 6 ms at 1080p and 1440p resolution and around 11 ms at 4K resolution. With their input lags in game mode, can be ascertained, they are very responsive for any games. Regardless you are playing casual or fast paced games, 60 fps or 120 fps games, and non HDR or HDR games, you will please with their performance. Moreover they both also support VRR technology that compatible with some gaming features, this certainly makes them are great for playing games.

Winner: Draw

Check the Latest Price
LG OLED CX LG OLED GX
48 Inches LG OLED48CXPUB on Amazon
55 Inches LG OLED55CXPUA on Amazon LG OLED55GXPUA on Amazon
65 Inches LG OLED65CXPUA on Amazon LG OLED65GXPUA on Amazon
77 Inches LG OLED77CXPUA on Amazon LG OLED77GXPUA on Amazon

Conclusion

For Watching Movies

Both of the LG OLED GX and OLED CX are outstanding TVs when used for watching movies in a dark room. Their perfect black and perfect black uniformity makes dark scene look excellent when they are set in a dark room, especially when playing HDR movies. Detail in dark scene can be reveled excellently, making shadow details of HDR images look excellent on their screen. Their pixel dimming level also makes them can show small highlight in dark scene with blooming free, great for a movies with a subtitle. Additionally, they both also have excellent up-scaling engine, allowing you to watch any resolution movies in 4K resolution with fine details preserved well. And their ability to remove judder completely allows you to watch movies with judder-free, regardless the source of the movies.

Winner: Draw

For Watching Sports

Both of the LG OLED CX and OLED GX are also great TVs when used for watching sports. Combination of their nearly instantaneous pixel response time and their BFI mode makes fast sports look smooth and clear on their screen. Additionally, they both also have good SDR peak brightness and good reflection handling, allowing you to watch sports obviously in most bright rooms without disturbed by the glare. And when you watch a big game with a group of your family or friend, their good side viewing angle coverage ensures all of you get best viewing. But even so, since the LG CX has a bit SDR peak brightness, in a brighter room, it can combat the glare a bit better than the LG GX. But even so, in general, their performance when used for watching sports is almost similar.

Winner: OLED CX

Video Games

Performance of the LG GX and CX when used for playing video games is also equally great. In addition they both have excellent picture quality, excellent motion handling, and good side viewing angle, they both also have excellent input lags.  So regardless you are playing fast paced games or casual games, HDR or non HDR games, 1080p, 1440p, or 4K games, this allows you to play them responsively without laggy. Additionally, they both also support VRR technology that is compatible with most of gaming features like FreeSync, GSync, or HDMI Forum VRR that will improve their gaming experience. This will please you when playing games, allowing you to play any games with screen tearing-free. And the support of ALLM (Auto Low Latency Mode) makes them can automatically switch to game mode once the compatible console game is detected. So, you don’t need to manually switch to game mode when you will play game. But keep in mind, all models of OLED TVs including LG CX and GX has a risk to permanent burn in, particularly when they are showing static images for a long time. So, play the same games over long time should be avoided to prevent their screen from permanent burn-in.

Winner: Draw

HDR Performance

Except their HDR peak brightness, their HDR performance is great. They both have nearly perfect black, making shadow details of HDR images looks excellently on their screen. Their great color gamut coverage in DCI P3 and Rec.2020 also makes them can show most of HDR content colorfully with vibrant and accurate color. Additionally, they both also have good color gradient, making HDR image can be shown with smooth color gradient. But unfortunately, their HDR peak brightness is still less than 1000 nits and not as bright as LED TVs, so they are not able to show HDR images at 1000-4000 nits of brightness range intended by content creator. But even so, for OLED TVs, their HDR peak brightness actually is great. Even though they cannot show highlight brighter than 1000 nits, but they are still able to bring out highlight in HDR, makes HDR images can be shown as bright as they should be.

Winner: OLED CX

Summary

As we have discussed a lot above, in general, their performance is almost similar. In certain aspects, the LG CX may be a bit superior to the LG GX, but their difference doesn’t have a significant impact on the picture produced and this may be caused by panel variance. Regardless you use them for watching movies, TV Show, Sports, Video Games, or HDR content, their performance is great. Meanwhile, the main advantage of the LG GX is on their design and their built-in audio system. So, which is a better choice between them? If design is not your main consideration in buying TV, the LG CX certainly is better than the LG GX. In addition it has similar performance and picture quality, its price is also much cheaper than the LG GX. But on the other hand, if you want to beautify the aesthetic of your room, the LG GX certainly is better. Now the decision comes back to you according to your own preferences.

Check the Latest Price
LG OLED CX LG OLED GX
48 Inches LG OLED48CXPUB on Amazon
55 Inches LG OLED55CXPUA on Amazon LG OLED55GXPUA on Amazon
65 Inches LG OLED65CXPUA on Amazon LG OLED65GXPUA on Amazon
77 Inches LG OLED77CXPUA on Amazon LG OLED77GXPUA on Amazon

Be the first to comment!
 
Leave a reply »

 

Leave a Response