No-latency overclockable (up to 1080p@~270Hz) monitor controller board

Whats happening here :LOL:


how the strobe works in this board? 4K60Hz and strobe backlight?
 
JRUHg said:
Whats happening here :LOL:


how the strobe works in this board? 4K60Hz and strobe backlight?
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Strobe turns on the backlight between frames. You can see the waveforms in the video when strobing is being discussed.

Strobing at 60Hz would be visibly flickery and unplesant to look at.
 
cirthix said:
Strobing at 60Hz would be visibly flickery and unplesant to look at.
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Some people find it usable (on a xl2720z) including me - I find it very useful for playing games that can't run at anything higher but I still want to play with minimal blur, and 60fps console games but I grew up with 50hz PAL crt flickering
 
tehidiot said:
Some people find it usable (on a xl2720z) including me - I find it very useful for playing games that can't run at anything higher but I still want to play with minimal blur, and 60fps console games but I grew up with 50hz PAL crt flickering
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If you want to use it, the feature is there. I have no qualms about supporting low-frequency strobing if people actually want it.

As it is implemented right now, strobing will be available for enabling if vblank is more than roughly 800us, regardless of the frequency.
 
cirthix Would an ultrawide monitor by LG work? Monitor model in question in my sig. Thanks!

Edit: Though I do know it only has DP & HDMI, so probably not? This is for DVI only? I've just only begun to read through this thread, so I apologize for my lack of knowledge.
 
CrimsonKnight13 said:
cirthix Would an ultrawide monitor by LG work? Monitor model in question in my sig. Thanks!

Edit: Though I do know it only has DP & HDMI, so probably not? This is for DVI only? I've just only begun to read through this thread, so I apologize for my lack of knowledge.
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LM250WW1-SSA1
http://www.panelook.com/LM250WW1-SSA1_LG Display_25.0_LCM_overview_21918.html

It is pretty slow (14ms GtG) and he will probably need to see the Tcon.

cirthix said:
Great news: latest version of DP2LVDS has better signal integrity characteristics and can operate in the HBR2/5.4Gbps DP1.2 mode. Using 1080p240 over DP now. Will get a radeon graphics card to check freesync operation ASAP.
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cirthix said:
Great news: latest version of DP2LVDS has better signal integrity characteristics and can operate in the HBR2/5.4Gbps DP1.2 mode. Using 1080p240 over DP now. Will get a radeon graphics card to check freesync operation ASAP.
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That's awesome, dude!
 
Wizzard said:
Did anybody say it was compatible with eDP LCDs?
LG Display LP173WF2-TPA1 Overview - Panelook.com

If, so, sign me up for one DVI, or DP when available!
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No, eDP is even easier. eDP panels can usually be driven directly from displayport with no chips in-between. This one even has an integrated led driver, so just supply it with 5v and the dp connections. Hardest part is finding/making a cable. If you are interested, there are off-the-shelf solutions on ebay/taobao/aliexpress for this sort of thing.
 
CrimsonKnight13 said:
cirthix Would an ultrawide monitor by LG work? Monitor model in question in my sig. Thanks!

Edit: Though I do know it only has DP & HDMI, so probably not? This is for DVI only? I've just only begun to read through this thread, so I apologize for my lack of knowledge.
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The pixel response is kind of slow, but it is 4ch 8bpp lvds, so this would be easy to drive. It being 10v is no problem, I'd adjust the board's output accordingly.

Ultrawides should in theory be easier to drive to high refresh rates because the DACs on each column of pixels has less to do. The row drivers aren't really a problem.

Show the TCON and I'll look around to see if it is used on other panels with possibly higher datarates.

What inputs the monitor currently has are irrelevant, we only care about what panel is used here.
 
Once I get brave with opening the monitor case, I'll see what I can do with the required TCON photo. I don't usually tinker with monitors.
 
Will this work with a Apple Cinema Display 27 inch? Those use the LG ips 1440p panel.
 
coolhandm3 said:
Will this work with a Apple Cinema Display 27 inch? Those use the LG ips 1440p panel.
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Yes, you should be able to get 115-120Hz out of it. You'll also need to swap the eDP TCON for the LVDS one, but these are fairly cheap.
 
free/gsync with strobing possible? the main scenario i'm concerned with is where the framerate is locked to 120. obviously the variable refresh thing doesn't come into play there, and the varying refresh rate is afaik why nvidia doesn't allow gsync with ulmb, so i don't see a reason why this wouldn't work. no motion blur, no input lag, no tearing is like the absolute most optimal setup possible and for some reason nvidia won't let us do it. i don't understand why they can't dynamically alter the strobe length/phase or whatever anyway to make it work with gsync. is that possible?
 
Odellus said:
free/gsync with strobing possible? the main scenario i'm concerned with is where the framerate is locked to 120. obviously the variable refresh thing doesn't come into play there, and the varying refresh rate is afaik why nvidia doesn't allow gsync with ulmb, so i don't see a reason why this wouldn't work. no motion blur, no input lag, no tearing is like the absolute most optimal setup possible and for some reason nvidia won't let us do it.
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It can be enabled, doesn't mean it looks good.

The problem is that brightness varies with framerate in this scenario. If you want to have perceptually constant brightness, you'd need to add some frames of latency to do so. A predictive approach is possible but nobody does it. Probably because predicting frametimes in games is a very difficult task, and if you screw it up, the user will notice it as a visibly flickery display and it will look like garbage.

Edit: also, overdrive is different with strobing. Having variable refresh mixed in makes it also harder to do. For 'optimal' results, additional latency is needed.
 
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cirthix said:
It can be enabled, doesn't mean it looks good.

The problem is that brightness varies with framerate in this scenario. If you want to have perceptually constant brightness, you'd need to add some frames of latency to do so. A predictive approach is possible but nobody does it. Probably because predicting frametimes in games is a very difficult task, and if you screw it up, the user will notice it as a visibly flickery display and it will look like garbage.

Edit: also, overdrive is different with strobing. Having variable refresh mixed in makes it also harder to do. For 'optimal' results, additional latency is needed.
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but enabling gsync and ulmb at the same time in a game like counter-strike where you can hold 120 fps 100% of the time would be totally fine, right? or am i missing something?
 
Odellus said:
but enabling gsync and ulmb at the same time in a game like counter-strike where you can hold 120 fps 100% of the time would be totally fine, right? or am i missing something?
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If you can have a soft guarantee of fixed framerate, it could be done with minimal sideffects, but NV has not implemented this functionality. You could add it with some hacking.
 
cirthix said:
If you can have a soft guarantee of fixed framerate, it could be done with minimal sideffects, but NV has not implemented this functionality. You could add it with some hacking.
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is there any way something like that could be tied in with your board or is it not possible because gsync is proprietary or some other reason? i don't know jack about any of the actual hardware so sorry if this is a dumb question, i just wish i could use ulmb with gsync on my PG278Q :(
 
cirthix said:
Yes, you should be able to get 115-120Hz out of it. You'll also need to swap the eDP TCON for the LVDS one, but these are fairly cheap.
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Sweet! I am down for one of these then. I wonder if I could add the gsync module from the pg279q to the cinema ips display..
 
coolhandm3 said:
Sweet! I am down for one of these then. I wonder if I could add the gsync module from the pg279q to the cinema ips display..
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I will say that it is possible but I cannot give you the information needed to do so, sorry. I do not recommend trying.

I don't see why you'd want to do this though, pg279q is very nice...

Email zisworks support for the preorder. That way nothing gets missed.
 
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Odellus said:
is there any way something like that could be tied in with your board or is it not possible because gsync is proprietary or some other reason? i don't know jack about any of the actual hardware so sorry if this is a dumb question, i just wish i could use ulmb with gsync on my PG278Q :(
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No, I will not support gsync. It is closed and proprietary. In their own walled garden, it is a very nicely done solution. As an outsider, it is not worth the effort. NV will eventually support freesync.

To hack your display, you'll need to have a very good understanding of how things go together. Find DE/VSY as a testpoint on the tcon and have a microcontroller intercept the backlight control signals. Not recommended.
 
Will this work with my HP ZR2740W V2? According to TFTCentral, I have the http://www.panelook.com/LM270WQ1-SDDB_LG%20Display_27.0_LCM_overview_19942.html ...

I have been quite happy with the monitor would LOVE LOVE LOVE to get 120Hz out of it..Also any chance of adding FreeSync? I know you mentioned FS over HDMI, but since my panel only have a DL-DVI and DP input, I would prefer to keep to one of those if possible..
 
ccityinstaller said:
Will this work with my HP ZR2740W V2? According to TFTCentral, I have the http://www.panelook.com/LM270WQ1-SDDB_LG%20Display_27.0_LCM_overview_19942.html ...

I have been quite happy with the monitor would LOVE LOVE LOVE to get 120Hz out of it..Also any chance of adding FreeSync? I know you mentioned FS over HDMI, but since my panel only have a DL-DVI and DP input, I would prefer to keep to one of those if possible..
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I had one of those for a while, nice housing, really liked the stand.

Yes, it can be made to work. Two notes:
1) The button board uses a flat flex cable, you'll need to come up with a way to plug it into the regular pin header style connector.
2) It uses the eDP tcon, so you'll need to swap to the LVDS one.

The panel is a slightly older version of what is used in the LG 1440p ips ones that overclocked to 115-120Hz, so the pixel response is a tad slower. Not sure if it will reach the same levels, but my guess is yes based on the tcon compatibility.
 
cirthix said:
No, eDP is even easier. eDP panels can usually be driven directly from displayport with no chips in-between.
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I dislike the direct passthrough as it requires scaling to run on the PC, which is a pain, and limits it to DP only, so I can't do screen double-duty with a PS4. I have one of these set up with an Ipad retina display.

I really want the onboard scaler, even with it's increased latency, and variable frame rate is also a fantastic feature.
 
Whatever you decide on, I hope it has DP and HDMI so there is console support too.
 
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cirthix Yes, but I was hoping for that sweet 120Hz action. I've got a 17.3" 1080p 3D panel sitting around.
 
cirthix said:
HP Z27Q?

I have a personal interest in playing with this panel, but I'd need to make additional adapter boards and it probably wouldn't make any money.
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LM270QQ1-SDA2 "offical" eDP 60pin. Panel cost 300$ ebay.

Dells used 5k monitor can go low as 600/800 euros. Well the cost is fundelmental part of this :bucktooth:
 
OK, so far we have tons of questions "will it work with my blah". What about the board itself? When and where can we buy it?
 
Ayaros said:
OK, so far we have tons of questions "will it work with my blah". What about the board itself? When and where can we buy it?
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Email [email protected]. A webstore has not yet been set up.

I have four boards ready to ship and about 7 orders to fulfil. Hand-assembling and testing individually is slow work. I made a new layout which has components on only one side and will try stencil+solderpaste+reflow oven soon.
 
cirthix said:
Email [email protected]. A webstore has not yet been set up.

I have four boards ready to ship and about 7 orders to fulfil. Hand-assembling and testing individually is slow work. I made a new layout which has components on only one side and will try stencil+solderpaste+reflow oven soon.
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That is a LOT of work for one person to do!

On a side note, People can pick up some INSANE LVDS panels from shady wholesalers like Alibaba

This is an 84 inch 4K screen that would be an awesome project. Though the price is hidden to non-members, I'm guessing it would be worlds cheaper than buying a fully-functioning 84" TV.

This is a 70" Ultrawide 1080p screen with LVDS interface that may be 100+ hertz compatible with this board. Once again, price is hidden, but this is the ONLY 21.9 large-format screen I've ever seen, so hopefully it is less than $1K.
 
I should get a 260x (cheapest gcn1.1 card that I could find) tomorrow. Downloaded the freesync demo program and it only has options for 45-50-55-60fps. Has anyone modified this to do more for testing purposes?

Sadly I can assume absolutely zero support from AMD at this point :(.
 
cirthix said:
I should get a 260x (cheapest gcn1.1 card that I could find) tomorrow. Downloaded the freesync demo program and it only has options for 45-50-55-60fps. Has anyone modified this to do more for testing purposes?

Sadly I can assume absolutely zero support from AMD at this point :(.
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Looks like the HBR2/5.4G mode is unstable between my board and the r7 260x. Ahwell, known-problem with this chip (new-rev should fix it).

Unfortunately, freesync is "not supported" in the radeon control panel despite my efforts to enable it. Anyone know how to properly detect freesync or force-enable this? Pretty sure it is not EDID-related.
 
cirthix said:
Looks like the HBR2/5.4G mode is unstable between my board and the r7 260x. Ahwell, known-problem with this chip (new-rev should fix it).

Unfortunately, freesync is "not supported" in the radeon control panel despite my efforts to enable it. Anyone know how to properly detect freesync or force-enable this? Pretty sure it is not EDID-related.
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I know that at the moment, FreeSync is only enabled through HDMI or Displayport 1.2a
 
Hi Cirthix I know this may sound silly but could this support A Sync on green VGA cable by chance(with a VGA to DVI adapter of course), See I have a few older consoles that do SoG, and I want to avoid using a lm1881 stripper or a YpbPr Transcoder.

But besides that, I still am interested, what is the Highest quality panel I could buy say off Ebay, alilibaba, and other source and make my own panel would you recommend?
 
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