Plasma TV : 1080p & 720p : 120 Hz Refresh Rate = CRT Like Motion

Sample TV on video is the 50" Panasonic TC-P50ST50 plasma TV.

reddit   / l1mroalgcs  

I apologize in advance with regards to background noise, it was taken on a weekend were my kids are just being kids. It actually adds authenticity to the video that it's not fake.

This is my raw video take, showing how to properly activate or overclock certain Panasonic Plasma 3DTVs which I discovered back in June 27, 2025, but the video was taken the next day. Undedited and uncut. My Pixel 7 pro is only capable of recording at 60 FPS, thus the 120 Hz Panning DOTA test recording looks blurry, but it's not in person, you can read character titles.

This is NOT a new discovery by any means, it's been extensively discussed on AV forums way back in 2013 or earlier. Some proof of pictures on reddit for select Panasonic Pro Plasma monitors such as the TH-50PF50U which uses dual link DVI, most notably 720p at 120 Hz, also other resolutions with much higher refresh rates. There are other Panasonic pro monitors capable of it, which is confirmed in AV forums, and ST30 and VT50 was also mentioned. That being said, I have never seen a VIDEO on how to actually do it, which is what this video is about today.

My method was used on non-pro Panasonic Plasma 3DTVs in my collection, using ONLY HDMI (1.4 or higher) or UNIDIRECTIONAL DISPLAY PORT (1.2 or higher) to HDMI (1.4 or higher) cable. I used an EVGA Kingpin RTX 3090 (Firmware 566) and Alienware Area 51 R7 Threadripper (2950x) edition with Windows 10 pro . I can confirm that this method worked with my Panasonic TC-P55GT30, Panasonic TC-P50ST50, and Panasonic TC-P42UT50. The number after the "P" is the screen size, and "T" means a 3DTV. Based on these models, there's a good chance it will work with all models on the 30 series and 50 series with the "T", eg. ST50, GT30. I don't have 3DTV 20 series to test with on hand but this might also work, please share your findings.

Unfortunately, THIS DOESN'T WORK WITH THE 3DTV 60 SERIES AT ALL, I've tested it with my ST60, VT60 and ZT60. Believe me, I have tried everything, including both modes of 3D detection. The 60 series is the reason I gave up completely when I started reading about this 120 Hz back in 2014 when I purchased both the VT60 and ZT60 at the same time in that year. I also failed with the ST50 like 4 years ago when I tried it again, it turns out, my procedure is just wrong, there is a very specific way to do it, which is what this video is all about, it's what actually works consistently for me.

With my very limited research, I believe this is made possible with the 3D capabilities of the TV, specifically, with Frame Sequential 3D mode at 720p (I read there is no such thing as 1080p Frame Sequential), hence the active signal resolution is at 720p (also shown on TV display info is 720p 3D). The 1080p/120 Hz version is just upsampled from that. This might also be due to my NVIDIA GPU, since they did have 3D vision in the past based on my research. I will be swapping it with AMD GPU and report back.

Well, there you have it, an actual video of Plasma TV at 120 Hz via HDMI or Display Port to HDMI, using a PC. What's it like? Almost CRT in motion but in HD. For questions, leave comments down below. Thanks for watching.

I am looking to compile findings at reddit/PlasmaTV_Gaming for future references.