Mini-Review: Samsung 40KU6400 as a monitor

JaAnTr · 7 Mar 2018 at 13:22

Is the UE40MU6120 also ok to use as a monitor? Basically does it have the 4:4:4 chroma subsampling? I can't really tell what the difference between 6120 and 6400 is, besides the price.

Grandmaster Fap! · 8 Mar 2018 at 12:03

JaAnTr said:
Is the UE40MU6120 also ok to use as a monitor? Basically does it have the 4:4:4 chroma subsampling? I can't really tell what the difference between 6120 and 6400 is, besides the price.

Im interested in this also. Plus does anyone have experience of how 1440 looks on the 6400? 4k would be sweet but i doubt my 1070 would drive that with all eye candy on at 60fps+. I like 1440 in that regard as i can whack settings to full and mostly get 60fps.

NZXT30 · 9 Mar 2018 at 10:22

JaAnTr said:
Is the UE40MU6120 also ok to use as a monitor? Basically does it have the 4:4:4 chroma subsampling? I can't really tell what the difference between 6120 and 6400 is, besides the price.

Yes it does 4:4:4. Very similar panels. The 6400 has slightly better contrast and grey uniformity.

Grandmaster Fap! said:
Im interested in this also. Plus does anyone have experience of how 1440 looks on the 6400? 4k would be sweet but i doubt my 1070 would drive that with all eye candy on at 60fps+. I like 1440 in that regard as i can whack settings to full and mostly get 60fps.

TVs usually do a great job displaying non-native resolutions.

Grandmaster Fap! · 9 Mar 2018 at 16:20

NZXT30 said:
Yes it does 4:4:4. Very similar panels. The 6400 has slightly better contrast and grey uniformity.

TVs usually do a great job displaying non-native resolutions.

Cheers mate, id be moving from a Benq BL3200 to the 6400, am i mad to switch?

Pulseammo · 9 Mar 2018 at 22:10

NZXT30 said:
TVs usually do a great job displaying non-native resolutions.

Any idea if this applies to TVs in PC mode though? I thought that in order to cut out input lag it had to run without the fancy scaling stuff?

NZXT30 · 10 Mar 2018 at 00:18

Pulseammo said:
Any idea if this applies to TVs in PC mode though? I thought that in order to cut out input lag it had to run without the fancy scaling stuff?

PC mode turns off unnecessary post processing. Monitors also have scalers built in, TVs usually have better ones.

padre · 12 Mar 2018 at 21:01

I've been using MU6400 40" for a week on PC setup with 1080ti for a week and and I'm very pleased so far.
I bet that 1070 would handle 4k gaming on this thing as well(not on full ultra settings but playable). So far I have tried PUBG, Killing Floor 2, MechWarrior Online and few others. Even my friends liked this setup. As a monitor its really acceptable with this size and dot pitch.

Grandmaster Fap! · 12 Mar 2018 at 21:44

@padre
Glad you are liking it

Could you possibly run a game in 1440 just to check the image quality for me? I'll probably run it in 4k but if 1440 looks ok i'll be a happy gamer, it'll at least give me a choice

Mr Ripper · 12 Mar 2018 at 22:42

I've just ordered a 40MU6400 + Club3d mini displayport 1.2 to hdmi 2.0 adaptor. I've only got an AMD 7970 but I'll run custom resolutions for the time being and the odd old game may work at 4k - It should be good to use with my high res photography.
It'll replace my 2012 27" Catleap 1440p monitor and my 23" dell 1080p monitor with connected standalone satellite tuner.

Reppyboyo · 13 Mar 2018 at 10:51

1440p looks fine to me.
A bit 'soft' sure but it's worth it to keep the fps up.

A lot of games run fine in 4k though with some tweaks.

Grandmaster Fap! · 13 Mar 2018 at 11:04

Reppyboyo said:
1440p looks fine to me.
A bit 'soft' sure but it's worth it to keep the fps up.

A lot of games run fine in 4k though with some tweaks.

Thanks for that Reppy

uniQ · 13 Mar 2018 at 14:11

I bought one based on this thread but ended up returning it. If you looked at it on it;s own it looked sharp but compared my U3415W and S2417DG Monitors it looked slightly "off". I found it giving me a headache even after short periods of web browsing. Otherwise a nice TV. I definitely had it setup correctly with 4:4:4 etc

sadbuttrue · 13 Mar 2018 at 14:35

uniQ said:
I bought one based on this thread but ended up returning it. If you looked at it on it;s own it looked sharp but compared my U3415W and S2417DG Monitors it looked slightly "off". I found it giving me a headache even after short periods of web browsing. Otherwise a nice TV. I definitely had it setup correctly with 4:4:4 etc

That'll be the PWM causing headaches.

The built-in image processing seems to soften images resulting in lost detail. On the few TVs I've tried recently 1080p bluray content looks almost like SD content when compared to a PC monitor side by side.

padre · 13 Mar 2018 at 17:03

Reppyboyo said:
1440p looks fine to me.
A bit 'soft' sure but it's worth it to keep the fps up.

A lot of games run fine in 4k though with some tweaks.

I can confirm that. Tried Killing Floor 2(Unreal 3 Engine) in 1440p and scaling works really well. Still helluva playable.

Grandmaster Fap! · 13 Mar 2018 at 17:57

padre said:
I can confirm that. Tried Killing Floor 2(Unreal 3 Engine) in 1440p and scaling works really well. Still helluva playable.

Thanks for that padre

Think i'll be pulling the trigger on one of these!

uniQ · 14 Mar 2018 at 20:03

sadbuttrue said:
That'll be the PWM causing headaches.

The built-in image processing seems to soften images resulting in lost detail. On the few TVs I've tried recently 1080p bluray content looks almost like SD content when compared to a PC monitor side by side.

Thanks for that I think you were right. I picked up a Sony KD43XE7073, as according to rtings it has similar input lag as the Samsung and no PWM/Flicker, so far no eyestrain/headaches

justwondering · 15 Mar 2018 at 22:38

I have the UE40MU6400, with a 1080ti, 4k looks great, for those wondering about 1440p yes the TV has a good scaler and 1440p for gaming looks great too.

justwondering · 15 Mar 2018 at 22:45

Out of interest which setting do people tend to use with their UE40MU6400 444 442 RGB etc? I see 442 allows upto to 12bit (I know the panel is only 8+frc) or rgb with full range or 444 with limited running at 8bit?

Which is best and most importantly why?

markoboyo11 · 16 Mar 2018 at 08:34

Is anyone managing to run custom resolutions with this tv at 60fps?

Anytime I set one up it runs at 30fps.

Would like to run lower resolutions sometimes with 1:1 pixel mapping and black borders.

the_boy · 17 Mar 2018 at 14:19

So I just got this TV today and think I've set it up correctly.

I'm running with a GTX970 and a HDMI 2.0 cable however how do I get it to stop cutting out?
This happens in games, standard browsing and films. The TV will go black / flicker from a heartbeat to a couple of seconds and can do it quite often or last a few minutes.

I'm assuming it's something to do with the lag?