Mini-Review: Samsung 40KU6400 as a monitor

Well mine comes tomorrow - hopefully i can live with the 970 till early next year as i dont wanna buy a 1080 now with the ti round the corner... Appreciate the review as it changed my mind from the LG 38" ultrawide!! ... I just hope this doesnt look too big on my desk...
 
Finally got mine. Using desktop scaling 125%

Normal desktop:
DT.png
Running WoW custom resolution (3840x1620) 21:9 @ 60fps on a 980ti
WOW.png
The colours look a little over saturated in the photo, but that is due to the photo. The real life image is fine in colour.

Only problems im having are random occurrences of a black screen appearing for 0.5s, especially when watching media. I have ordered a new HDMI cable, to see if that resolves that. As I only had an older one to hand. Older as in 10+ years.

I do get some image smearing on high contrast webpages, full colour image on a white background, but that is to be expected from a TV. No problems gaming tho.

Its great for my eye condition as I can now enlarge the source code in visual studio, whilst keeping a lot of it on screen.
 
This is interesting for two reasons.

I was going to buy Amazon Prime but my current Panasonic Plasma does not support it. I am not ready for 4K TV as SD looks crap.

I am now playing with 4K video work and was considering replacing my Dell 34" Ultra wide

Whats this TV like with every day PC stuff, like work documents, browsing etc. Also whats it like with processing videos and photos
 
i don't get it.. why can't u do 1440p on this set?

and if you can't do 1440p without it looking horrible, why are people doing custom resolutions to mimic ultra wide? wouldn't u get the same issues?
 
aoaaron said:
i don't get it.. why can't u do 1440p on this set?

and if you can't do 1440p without it looking horrible, why are people doing custom resolutions to mimic ultra wide? wouldn't u get the same issues?
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custom is still doing one pixel to one pixel, you just have black bands top and bottom which is fine. You loose no quality and gain fps.

if you set it to run 1440p then you have a mismatch between the pixels on the screen and your intended resolution. It doesnt matter how good your screen is, and some are better than others, you will always end up with it not looking as good as a true 1440p screen.

Of course if you want super fast framerates you can run in 1080p which is a perfect match with 4 pixels of the 4k screen making up each pixel of the 1080p screen.

Which is also why 125% desktop scaling looks horrible too and should be avoided.

The screen is big enough that you should be find running at 1:1

I have my 4k screen at 100% at its only 32"
 
Jeps said:
Any idea what the response time is on these when running in PC mode?
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Dunno, how to work that one out sorry. It seems pretty quick.

cms239 said:
This is interesting for two reasons.

I was going to buy Amazon Prime but my current Panasonic Plasma does not support it. I am not ready for 4K TV as SD looks crap.

I am now playing with 4K video work and was considering replacing my Dell 34" Ultra wide

Whats this TV like with every day PC stuff, like work documents, browsing etc. Also whats it like with processing videos and photos
Click to expand...

Its just like using my old 27" AOC 1440p IPS. Desktop is clear and sharp, and colours are just like the IPS it replaced. Altho, I will calibrate it with my Spyder Pro at the weekend. It plays 4k youtube fine, and photoshop looks just as good as it did on my old monitor.

I did set up colour to be chroma 4:4:4. Apparently, on the HDMI 1 slot is compatible for PC.

nvidia.png
 
Greebo said:
Which is also why 125% desktop scaling looks horrible too and should be avoided.

The screen is big enough that you should be find running at 1:1

I have my 4k screen at 100% at its only 32"
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I agree with the above. But I have Keratoconus, which is an eye condition resulting in the deformation of the cornea, 75% of the eye's focusing power. So depending on the app, I sometimes require the scaling.
 
Anyone know if this TV will overclock/do 1080p @ 120hz?
It appears that some 4K TV's are able to do this, but they tend to be 50-55" models.
 
djkav said:
I agree with the above. But I have Keratoconus, which is an eye condition resulting in the deformation of the cornea, 75% of the eye's focusing power. So depending on the app, I sometimes require the scaling.
Click to expand...

Fair enough then. Was just pointing out that best to run at 100% and its big enough to do so. Obviously doesn't suit everybody though and luckily you can change things to whatever you want/need
 
Been using it for about two months now and it really is outstanding for the £460 I paid. Really good blacks, no light bleed and good uniformity, there is some high contrast smearing/ghosting though but it's about the same as an iiyama va monitor i had previously.

Couldn't notice any input lag in pc mode @ 444, tested whilst playing doom, switching to non pc/game mode the lag is instantly noticable, going back to pc mode feels right again.
 
I didn't realise TVs had reached a point where the input lag was low enough to use like this. I bought myself a 55" Samsung ks7000 recently so decided to lug my son's pc out of the man cave and try it out - I'm well impressed.
 
thanks for the heads-up OP

I tried using my 42E8 (1080p) Panasonic VA panelled TV last night - and have to say whilst size is a bit shocking - I'm impressed how everything looks crisp - even text in windows - so a 4k panel must look great.

I fully calibrated mine with HFC and an i1 Pro

its now enough of a proof of concept tempted with one of these Samsungs

only issue is my GPU can't output 4k - which is going to be an issue - I have a Sapphire Tri-X 290

the only annoyance I found with the Panasonic and I guess same as Samsung - TVs don't tend to have "sleep" mode - ie it will go into sleep when no signal but will not turn back on automatically when the PC wakes up - unlike what monitors would do

ok only one button press on a remote - but slightly annoying
 
[HB]Rugrat;30228734 said:
I didn't realise TVs had reached a point where the input lag was low enough to use like this. I bought myself a 55" Samsung ks7000 recently so decided to lug my son's pc out of the man cave and try it out - I'm well impressed.
Click to expand...

I bet that looks sweet.
 
I have been debating this for a few weeks. Currently use a Dell U2125H with a Dell XPS13 and PS4 connected. Shame I can't use HDR for the last of us, or watch the grand tour in 4k hdr. Prices have been coming down, and I could still get good money for the dell.

Decisions, decisions.

The only thing holding me back is the sheer size of the thing right in front of my face

is 40" too big?

why don't they make a 32" model Grrrrrr
 
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