DIY 240Hz Non-interpolated zero-buffer display.

Advanced display talk, display hackers, advanced game programmers, scientists, display researchers, display manufacturers, vision researchers & Advanced Display Articles on Blur Busters. The masters on Blur Busters.
ericl
Posts: 104
Joined: 09 Jan 2014, 14:50

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by ericl » 09 Jan 2014, 15:09

Pretty crazy... and congrats, this is way out of my league (I have no idea how you would create that board)

Random questions flying through my mind:

- That monitor has a baseline of 2m response time (compared to others that have 1, etc)... would it be better to mod another monitor? Does lag improve at 240hz? (Maybe I'm missing something).

- Lighboost is awesome, any reason why it doesn't work at 240hz?

Last, but not really least, do we have to mod the nvidia drivers in order to get it working? I have a 780 GTX and little knowledge on how to do this. Soldering the board is no problem, I just don't program!

I'm interested!

User avatar
Chief Blur Buster
Site Admin
Posts: 8127
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by Chief Blur Buster » 09 Jan 2014, 18:30

ericl wrote:- That monitor has a baseline of 2m response time (compared to others that have 1, etc)... would it be better to mod another monitor? Does lag improve at 240hz? (Maybe I'm missing something).
Reports say that lag does improve. 240Hz means a frame scanout of 1/240sec (4.1ms) and 120Hz means a frame scanout of 1/120sec (8.3ms).
ericl wrote:- Lighboost is awesome, any reason why it doesn't work at 240hz?
There's not enough time between refreshes for fully refreshed frames to cleanly strobe a backlight through. Also, if you look at cirthix's high speed video, you will see the refreshes ghost into each other too much, to allow the use of a strobe backlight. So there would be more motion blur with this 240Hz mode, than with a LightBoost mode.
ericl wrote:Last, but not really least, do we have to mod the nvidia drivers in order to get it working? I have a 780 GTX and little knowledge on how to do this. Soldering the board is no problem, I just don't program!
It's just the same driver mod found at www.monitortests.com
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

User avatar
valfranx
Posts: 10
Joined: 12 Jan 2014, 15:50

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by valfranx » 12 Jan 2014, 16:10

impressive. Now that the video card is necessary to support 240Hz? one titan can support this rate?

User avatar
Chief Blur Buster
Site Admin
Posts: 8127
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by Chief Blur Buster » 12 Jan 2014, 20:57

valfranx wrote:impressive. Now that the video card is necessary to support 240Hz? one titan can support this rate?
Most graphics card made in the last few years, can output 240Hz at a low resolution. For 1080p at 240Hz, you need DisplayPort, so most higher-end graphics cards made in the last two years.

So yes, a Geforce Titan will also work at 240Hz, as does the 770/780 too, as the 670/680/690 as well. The Titan is the card I am currently using.

You also need to weigh the benefit of 240Hz low-latency without strobing, but 4.1ms of motion blurring (4 pixels of motion blur during 1000 pixels/second) or using 120Hz slightly higher-latency WITH strobing (e.g. LightBoost/ULB), with only 1ms of motion blur (~1 pixel of motion blurring during 1000 pixels/second). There are pros and cons with the high-Hz approach, as it already pushes the limits of the panel. That said, for low-latency LCD gaming, the 240Hz LCD has less latency than the lowest-latency 120Hz LCD, thanks to the faster scanout. Low latency is a win for low input lag competitive gamers (Quake-type fast-twitch FPS gaming).
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

Q83Ia7ta
Posts: 748
Joined: 18 Dec 2013, 09:29

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by Q83Ia7ta » 16 Jan 2014, 19:40

Any news?

User avatar
BTRY B 529th FA BN
Posts: 164
Joined: 18 Dec 2013, 13:28

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by BTRY B 529th FA BN » 17 Jan 2014, 18:25

I see money in this member's future!

Nice work

User avatar
Chief Blur Buster
Site Admin
Posts: 8127
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by Chief Blur Buster » 17 Jan 2014, 18:34

Indeed, cirthix won one of the G-SYNC Upgrade Kit boards, so I'm hoping he'll do something exciting with it.
(Once he posts the required NVIDIA feedback publicly regarding a stock-modded G-SYNC monitor).
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

DICKTracy
Posts: 50
Joined: 15 Mar 2014, 16:04

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by DICKTracy » 04 Apr 2014, 03:30

So... wanna try this on the EIZO Foris fg2421?

Q83Ia7ta
Posts: 748
Joined: 18 Dec 2013, 09:29

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by Q83Ia7ta » 24 May 2014, 15:20

I'll be glad to see XL2411Z overclocked or modified since it has PWM 18 kHz. XL2411T has 180 Hz PWM.

User avatar
Chief Blur Buster
Site Admin
Posts: 8127
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: DIY 240Hz Non-interpolated zero-buffer display.

Post by Chief Blur Buster » 24 May 2014, 22:29

Q83Ia7ta wrote:XL2411T has 180 Hz PWM.
My XL2411T (Version 1) seemed to have this PWM at 360Hz (during 120Hz). I could easily see it occuring as a triple image effect in a TestUFO motion test (multi-image PWM artifact)
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

Post Reply