XL2730Z Dual-Link DVI @ 110Hz

[hyrule571]

*EDIT*
I've found that there's obvious input lag with the XL2730Z running 2560x1440 @ 110Hz. I tried 109Hz (449.77MHz), and 100Hz with the same results regarding input lag. If you want the resolution with DVI at such a high refresh rate you will have to deal with obvious input lag. Another workaround I've came to is changing the resolution to 1920x1080 @ 144Hz on this XL2730Z panel through CRU. Although it looks grainy, the input lag seems like it disappeared. Therefore, if you want to game at 2560x1440 @ 144Hz, you should consider upgrading your graphics card to something that is equipped with a Displayport interface. You will then be able to use the provided Displayport cable that BenQ provides with this panel.
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*ORIGINAL POST*
Do the following at your own risk. Not every manufacturing process is perfect. Therefore, not every panel is the same.

Hey guys! Just wanted to make a post to anyone who acquires this monitor that dual-link DVI is possible at 110Hz. DVI cannot seem to properly run 144Hz, let alone 120Hz at 2560x1440 possibly due to throughput limitations on the board's DVI receiver as well as the TMDS transmitters on a graphics card regarding DVI. 450MHz is the limit, and 2560x1440 @ 120Hz surpasses this limit.

Therefore, I went ahead and installed ToastyX's pixel clock patcher software. I booted both of the .exe's included in the package due to the fact that I had no idea which to choose because I have a 560 Ti. Afterwards, I booted CRU by ToastyX and created some custom profiles. I made a 105Hz profile, a 108Hz profile, and a 110Hz profile. I rebooted my PC and fidgeted with some settings in my games until 110Hz worked. CS:GO worked right away after the reboot, but UT2004 needed to be adjusted in the configuration file. You may be able to get over 110Hz if you're lucky, and I may be able to as well. I haven't tried, nor do I care to have anymore refresh rate through DVI because 2560x1440 @ 110Hz barely surpasses and pushes the 450MHz DVI pixel clock limit to the teeth. 144Hz = Displayport as noted by ToastyX in this post here.

PS: It would be nice to see whether or not "overclocking" the DVI receiver increases input lag. Especially when you go beyond the 450MHz limit. Just a thought!

[petska]

(04-07-2015 07:52 AM)hyrule571 Wrote:  PS: It would be nice to see whether or not "overclocking" the DVI receiver increases input lag. Especially when you go beyond the 450MHz limit. Just a thought!

519MHz here. don't feel any additional input lag.
http://i.imgur.com/yefnkb5.jpg
also http://forums.blurbusters.com/viewtopic.php?f=8&t=2458

[falkentyne]

(10-02-2015 09:05 PM)petska Wrote:  

(04-07-2015 07:52 AM)hyrule571 Wrote:  PS: It would be nice to see whether or not "overclocking" the DVI receiver increases input lag. Especially when you go beyond the 450MHz limit. Just a thought!

519MHz here. don't feel any additional input lag.
http://i.imgur.com/yefnkb5.jpg
also http://forums.blurbusters.com/viewtopic.php?f=8&t=2458

There's a lot of bugs in the XL2730Z firmware, including being unable to strobe in sync with the refresh rate lower than 120hz. Wouldn't surprise me if there were other issues.

I emulated the XL2730Z on my XL2720Z by creating a 2560x1440@100hz resolution through an EDID override on the XL2720Z, which works because it accepts the vertical total value which lightboost seems to use internally for reduced strobe crosstalk (the VT 1497-1502 range). This is more of a bug than a feature, but 2560x1440 works at every refresh rate from 61hz-115hz (60hz will not work due to VT 1500 black screening even at 1920x1080). No input lag added over displayport.

I'll test DVI.
If there's no input lag with the Mstar scaler downscaling 2560x1440 to 1920x1080 over DVI, then this is a clear bug in the XL2730Z's realtek scaler.

Yep no lag on 2560x1440@100hz through DVI on XL2720Z (this is a scaler overclock, mind you, this uses mstar 8556T).

So the input lag must be realtek specific to XL2730Z.

[hyrule571]

Hey guys! I still have the XL2730Z, and it's been great.

From what I recall, there was noticeable input lag on overclocked DVI output (in reference to the original post). I can truly say that there is a difference between DisplayPort and DVI when using high refresh rates on this monitor.