Originally Posted by S_rangeBrew
According to Rtings
, even last years Q6FN can do 1440/120Hz, but only if you turn off Chroma 4:4:4
" The Samsung Q6FN supports most of the common resolutions without issue. Strangely, it supports 1440p @ 120 Hz without issue as long as Chroma 4:4:4 is not used, but 1440p @ 60 Hz is not supported.
4k @ 60 Hz with Chroma 4:4:4 or 4:2:2 require HDMI UHD Color enabled for the port used. For all resolutions Chroma 4:4:4 requires the input label to be set to PC
Many thanks for the info!
I reached out to rtings regarding this issue and this is the conversation below with surnames and email addresses removed. Note, you want to start from the bottom:
8:26 AM (3 hours ago)
We've only tested the VRR on the Q900 so far, and it has a 4k VRR range of 48-60. It is technically a 2018 model though, so we don't know yet if anything has changed. As far as we can tell, the Samsung TVs technically implement FreeSync (not FreeSync 2). They do support LFC, but only at 1080p. LFC requires the maximum refresh rate to be at least twice the minimum, so for a 4k display, this would require either a refresh rate range of 30-60 Hz, or to support a higher maximum refresh rate, with a range like 40-80 Hz or 48-96 Hz. As these surpass the bandwidth limitations of HDMI 2.0, it isn't possible yet.
Welcome to the site, and thank you very much for your contribution!
Sent: Friday, March 15, 2019 11:18 AM
Subject: Re: Tv review suggestion and question
Many thanks for your reply!
I didn't really expect the Q80 or Q70 to be able to accept a 120Hz 4k input from a computer, but it would be great if the VRR went down to a lower frame rate. As you reported in your reviews, the VRR on the Q7, Q8 etc only goes from 48Hz to 60Hz. Is this range the same for the 2019 Samsungs? I am really hoping for a range 40Hz to 60Hz, or even 30Hz to 60Hz. Do you know how low VRR goes on the 2019 Samsungs? Does Samsung call it "Freesync 2"? If so, then that would imply that it can go down to lower frame rates, right?
PS I just became a yearly subscriber.
On Fri, Mar 15, 2019 at 6:27 AM Adam wrote:
Thanks for your email!
We should be receiving the 55" Q70 today, but the 55" Q80 isn't out yet. We will order it once it is available. We don't expect these models to support 4k 120 Hz 4:4:4, as that requires HDMI 2.1, which these TVs do not support. The Q90 is supposed to support 4k 120 Hz, but only at 4:2:0, 8-bit, as it is possible to fit that within HDMI 2.0 bandwidth. So far this year, only LG has confirmed that their top-tier TVs will support HDMI 2.1 full bandwidth, but even then, there are no devices currently on the market that can output 4k 120 Hz 4:4:4.
We are currently working on the Samsung Q900, which should be our next review, followed by the Q60.
Sent: Friday, March 15, 2019 12:00 AM
Subject: Tv review suggestion and question
I’d love to see a review of the new Samsung Q80 or Q70 in a 55inch panel. I’m especially interested to see if they accept a 4k 120hz 4:4:4 signal. And also what the VRR frequency range is. Perhaps you know those things already?
What TV are you planning to review next? When do you think the review will be ready?
Thanks for your great work. I will become a contributor soon.