LG Ultragear™ Gaming Monitor(32″) 4K UHD (3840 x 2160), Stunning Gaming Imagery – Nano IPS @144 Hz, 1ms with ATW, NVIDIA G-SYNC & AMD FreeSync,…

 Recently I purchased this monitor, here is a brief review for anyone to consider

Pros
Color accuracy
Brightness, very bright even in SDR
High refresh rate of 144 Hz and even supports 160 Hz factory overclock over display port cable
Gaming , supports very fast response times
No dead pixels
Firmware updates!
Good color calibration, downloaded icc color profile for this monitor from mac into windows as windows uses only generic color profile , other than this I downloaded rtings color profile from their review

Cons
HDR is average, use HDMI 2.1 with ycbcr444 for better hdr, more details on bandwidth below
Light bleed is there in corners, however I expect it to disappear over time (that is what happened with my old monitor)
No auto source button, every time we have to manually switch between different hdmi or dp input

Apart from this trivial issues here is some interesting info about Display Stream Compression or DSC

Displayport 1.4a max bandwidth is 32 Gbps theoritically, however with DSC it is able to support more than 45 Gbps, however DSC has some drawbacks

1. It is visually lossless and 75% of people won’t notice it, this is as per DSC specifications, which can be refered directly, if you are in the remaining 25% crowd like me, you will notice image quality reduction due to lossy compression, it’s not really lossless, only visually lossless
2. To achieve decompression of signal a microchip is used in monitor, this may malfunction at times, leading to black screen, especially during variable refresh rates, surprisingly I encountered this black screen once with this monitor when using mac with displayport and DSC, however with my 4090 DSC worked without any black screens
3. Due to continuous decompression, there will be tiny lag
4. It may heat monitor due to constant decompression

So these are some issues with DSC (this applies to any monitor using this compression to achieve higher frame rate)

Fortunately HDMI 2.1 bandwidth is 48 Gbps theoretical max and more than 40 Gbps in real world

With HDMI 2.1 10 bit 4k 144 HZ is native without compression
See, 4k is 3840×2160, 10 bit per color, that is 30 bits for rgb, so a single frame is 3840x2160x30 bits, for 144 HZ this will be 3840x2160x30x144 which is 35,83,18,08,000 bits or 33.37 Giga bits which fits easily in HDMI 2.1 bandwidth without compression

Indeed, I switched my 4090 to use HDMI2.1 to this monitor instead of Display Port, as DIsplay Port uses DSC to achieve more than its bandwidth causing compression loss in quality and other potential issues like heating, lag and black screens

I uploaded a video of the high speed refresh rate of this monitor using my phone to capture how it really feels (only sitting next to it and playing high refresh games in 4k will really give its feel, but at least for those who want to sneak peek it’s feel, this video may help)