Samsung S27A750D tips?

[Vinnie]

So I just bought myself the monitor listed in the topic title. It will arrive tomorrow.

I've read that CrossfireX will support HD3D with the new ATI preview driver (12.1).

My question if you, my fellow Guru's, have any tips for the setup of this display. How do I get HD3D to work properly in, for example, Battlefield 3? And what kind of cable should I use to connect to this display?

[Vinnie]

65 views and no one has experience with this monitor?

[scheherazade]

The S27A750 has no DVI connector, only hdmi, so it can't go over 24fps (stereo) in 3D at 1080p.

You would need the S27A950 with DVI (dual link) if you want 120hz (60hz stereo) in 3D at 1080p. (or even just plain 120hz 2D for that matter...)

IIRC :
The hdmi S27A750 (and also the hdmi/dp only variant of the 950, the T27A950), also has around 40ms input lag, compared to the S27A950 dvi version's 16ms.

On a positive note, the 950 has 100% RGB color coverage, and glossy screen.
This actually makes it suitable for design work, as the color is accurate and there is no black-ambient-wash-out like with matte screens.
I believe the 750 might be in the same boat, not sure though.

-scheherazade

[Vinnie]

Originally Posted by scheherazade

The S27A750 has no DVI connector, only hdmi, so it can't go over 24fps (stereo) in 3D at 1080p.

You would need the S27A950 with DVI (dual link) if you want 120hz (60hz stereo) in 3D at 1080p. (or even just plain 120hz 2D for that matter...)

IIRC :
The hdmi S27A750 (and also the hdmi/dp only variant of the 950, the T27A950), also has around 40ms input lag, compared to the S27A950 dvi version's 16ms.

On a positive note, the 950 has 100% RGB color coverage, and glossy screen.
This actually makes it suitable for design work, as the color is accurate and there is no black-ambient-wash-out like with matte screens.
I believe the 750 might be in the same boat, not sure though.

-scheherazade

Thanks for your reply. It comes with a displayport cable. Is not the display port cable a better cable than HDMI?

EDIT - I would actually find it very weird if AMD stated this display as one of the recommended displays while it cannot display more than 24FPS in 3D.

[scheherazade]

Originally Posted by Vinnie

Thanks for your reply. It comes with a displayport cable. Is not the display port cable a better cable than HDMI?

EDIT - I would actually find it very weird if AMD stated this display as one of the recommended displays while it cannot display more than 24FPS in 3D.

All HDMI 1.4 3D devices at 1080P are 24fps. That's what the HDMI spec defines.

You should technically be able to hit around 31 or 32 3D fps tops, since that will max out HDMI bandwidth.
But for official spec compliance, the monitor will likely only allow you to set it at 24hz 3D.

The reason it's relevant is because the "HDMI 1.4" paper spec defines image formats for 3D.
Side-by-side (two images joined into one), Above-and-below (two images stacked into one), Interlaced (half resolution), etc.
Input hz is matched to the stereo output-hz, each input having two eye's data (double bandwidth requirement of '2D mono-eye images').

It's different from nvidia's method, which is to send double framerate to the display.
Left,Right,Left,Right.
Input hz is 2x the rate of the stereo output hz, each input having one eye's data.
Being dual link DVI, and having 2X the bandwidth of HDMI, this means it can technically do a hair more than 60hz 3D at 1080P (120hz 2D at 1080P).

The connection method does not determine the 3D format.
It's simply a convention.
The organization behind HDMI simply said that HDMI devices should agree on some methods to convey stereo data, and here are some methods. If your devices supports all, you can claim to be '1.4 compliant'.
There's no technical issue stopping an HDMI connection from sending 720P sequential imagery at 120hz (2D) - other than the design of the monitor itself, and whether or not it will accept you to sending 120hz input.

That sort of gets to the heart of the matter, too.
I prefer nvidia's sequential style, because you can 'abuse' their 3D format (left/right sequential separate images) to simply show 120hz 2D imagery.
The monitor is just taking 120hz input data and the glasses switch/block left/right vision, so each eye gets 60hz.
Take off the glasses, and you have 120hz per eye.
Set your refresh rate to 120hz, and you have a 120hz 2D display capable of showing 120fps. WIN.

If a monitor is built to go into 120hz left/right switching output (aka 60hz 2D) only when sending double-wide or double-tall images at 60hz input, then it's not suitable for 120hz 2D desktop use.
And as 'neat' as 3D is, 120hz 2D is friggin' awesome by comparison.

I haven't used displayport, and I don't know if this monitor supports sequential (nvidia style) 3D via DP, or if the monitor uses HDMI format styles (side-by-side, above-below, etc) when connected via DP for 3D.
If the display can do 120hz 2D sequential via DP (with low input lag), then it's a keeper.
Especially when the color reproduction is so good.




That's a long winded rant, just to get to the point.

YES, DP is better than HDMI. It has more bandwidth.

HDMI only has enough bandwidth for 1920x1200 at 60hz. A little over 60hz at 1920x1080P.
For 3D, that drops in half, a hair over 30hz at 1080P.
HDMI spec settled on 24hz as the value to use, since it will match movie framerates and does not need a pull-down to sync frames.

HDMI was conceived primarily for AV equipment, and the suitability for 'computers' is secondary.
If people weren't so looks sensitive (blue lights, neat looking small connectors), then the industry wouldn't be selling crap connectivity standards that are worse than what came before them.

-scheherazade

[---sk---]

Originally Posted by scheherazade

The S27A750 has no DVI connector, only hdmi, so it can't go over 24fps (stereo) in 3D at 1080p.

You would need the S27A950 with DVI (dual link) if you want 120hz (60hz stereo) in 3D at 1080p. (or even just plain 120hz 2D for that matter...)

IIRC :
The hdmi S27A750 (and also the hdmi/dp only variant of the 950, the T27A950), also has around 40ms input lag, compared to the S27A950 dvi version's 16ms.

On a positive note, the 950 has 100% RGB color coverage, and glossy screen.
This actually makes it suitable for design work, as the color is accurate and there is no black-ambient-wash-out like with matte screens.
I believe the 750 might be in the same boat, not sure though.

-scheherazade

so its correct that HDMI gives 40 ms inputlag
so when i use the displayport cable
i wont have anymore inputlag ? on my s27a750d

kinda dissapointed with hdmi more input lag ?

Proof:
left s27a750d right samsung 245B

http://dl.dropbox.com/u/27621160/Monitor/IMG_8727.JPG

why does it have more input lag then my 245b? on dvi

[Corrupt^]

Haven't really looked into it myself but loads of people were complaining about the lack of a Dual Link DVI port on the monitor. In the end all of those just had to use the Displayport.

Problem is when you get them set up they're great monitors but there's not many people out there who have them. I'm planning on getting one to, but the prices need to drop first :p

[---sk---]

i think ill get a gtx 680 with displayport and sell my gtx 570 no other choice i geuss.


they weird thing is i can let it run on 120hz and its so much smoother.

yes its a dvi-d to hmdi cable. and when i make a custom resolution in 301.24 i can run 1080p@120HZ only in windows or game in windowed mode. but that also gives more lag lol

so im getting a videocard with DP


but on Displayport the lag shoul be gone right. its like 30ms slower then my 245b old 5ms samsung

this one should be 2 ms and no inputlag

[---sk---]

Here is some proof that the s27a750 is slower on hdmi then my old smasung 245b
http://www.youtube.com/watch?v=4y_F0mNEhsk

i hope this is only because its not running on displayport otherwise this monitor is a big fail...

[---sk---]

i done some more extensive testing and i found out hat the samsung s27a750d is slower and has more input lag on 60hz then an old samsung 245b on 60 hz.

a s27a750d is only quicker @ 120hz here is the proof

http://www.youtube.com/watch?v=pu6tO5U2e-I 120 hz


in this video a test on 60 hz all 3
the 245b wins --> http://www.youtube.com/watch?v=4y_F0mNEhsk

[deltatux]

Originally Posted by Vinnie

Thanks for your reply. It comes with a displayport cable. Is not the display port cable a better cable than HDMI?

EDIT - I would actually find it very weird if AMD stated this display as one of the recommended displays while it cannot display more than 24FPS in 3D.

DisplayPort would be your better option for monitor connectivity.

deltatux