LG 27GK750F-B - 240Hz, 27" 1ms Blur reduction, Freesync

[A Solid lad]

Here are my results with the defualt windows driver for my gfx card: ("rolled back" from geforce game ready drivers)




Alienware AW2518H connected to the PC.

[A Solid lad]

driver version 391,09 I guess.

You guessed wrong, that driver version doesn't exist...could u check it maybe?

[lexlazootin]

Click latency really depends on if you're using Aero or not, with it off you can get a lot lower click latency. Also online tests can be crappy because you don't know what frame rate they run/poll at.

I made a small app for this awhile ago, it runs v-syncless full screen so it's a much better test: http://www.mediafire.com/file/v67qwot6a ... nchmark.7z just drag reactiontest2 folder onto love2d.exe

Also you're not going to notice latency differences from DCP latency.

Also rolling back drivers and messing with your Timer? come on guys, idk what you're expecting to find but you're not going to find it.

[k2viper]

It seems similar to the LG monitor, but maybe a "street view" test could help more.
One thing I don't understand is that VT1304 doesn't seems to improve the MBR, maybe just a bit the Blacks.
I followed your tutorial with ToastyX, after restarting the PC the digital brightnees was resetted in the Nvida panel so I guess it worked.
Do you find a real better MBR with the VT 1304?

No, I stick with VT 1304.
It works, but you should realize that you only make VBI 224 from default 100, which is not enough to make effect so obvoius.
A abit more obvious improvement can be achieved e.g. in 120-144hz where you can kick in VT 1580. Improvemend still is not huge, but it can be seen so I think VT tweaks are working as intended.

Yes, I also think XL2546 crosstalk look pretty similar. I found that LG uses Mstar scaler that may have very similar firmware default setting when it comes to strobing. It's even possible that it's Mstar/AUO did good job by calibrating strobing, and LG just used its defaults just like Benq has.

[k2viper]

You two are really fast... I could only manage around 190 if I tried really hard, lol.
Are u using the same test as me? (https://faculty.washington.edu/chudler/ ... green.html)

btw, I've realised as well, that drivers play a huge part in dpc latency... I was about to install the latest drivers after uninstalling the previous ones with DDU (thought I'd give fresh gpu drivers a try) AND BOOM 4-6 microseconds of latency in dpc latency checker...
so guess I'll have to reinstall drivers until I find one with low dpc overhead...

Thats a benchmark (first in google): https://www.humanbenchmark.com/tests/reactiontime/

Yes, sure, driver versions behave a bit different when it comes to DPC latency. I found that a long time ago, and thats why I usually stick with some exact driver version for a long time, after I find it stable and providing good DPC's. Currently I'm on 385.69. What exact version you got with 4-6mcsecs?

[A Solid lad]

I used the basic windows drivers, which u get when u uninstall drivers with DDU.... you know, the basic windows driver, which only lets you set 60hz and no aero, and doesn't even display your gfx card's name.

I'm hoping to get single digit latency numbers most of the time, with very few spikes, when no app is unning in the background.

[giubox360]

driver version 391,09 I guess.

You guessed wrong, that driver version doesn't exist...could u check it maybe?

yeah sorry you are right: my driver version is 391,01
Anyway I installed 3 new drivers and graphic cards without using UDD....the point is just to understand if the monitor can really change something about latency in the DPC or if it is only about which monitor has been used with the first video driver istallation.
( also keep in mind that different graphic cards/drivers produce different DPC latency, as you can see mine has sometime 1 digit for the LG Model, and almoust keep always one digit in the DPC current measure with my first monitor: samsung cfg70, but not with the LG.)

For this reason maybe, you did right unistalling the graphic drivers, could you try to test all the monitor DPC latency with "latencymon" in this situation? run the test at least 1 minute for each monitor, to have adeguate average measures, please This could help.
One other test could be to test all the monitors making a graphic driver reinstallation before a new one. ( a bit boring maybe)

p.s.
in your review you said that the LG is a bit more washed out when moving objects, and the alienware freesync not...could you please explain better, please? Did you mean about colours or do you you feel it less responsive?
With MBR I find it slight better than when it is off, for this reason at the moment I prefer to catch a 240 hz with MBR as this one or the Benq XL2546 that is still in my thoughts. ( acer, asus or dell Panels have only MBR at 144 hz)
Maybe this is because I'm not a CS player, I prefer Quake, UT or similar fps. (and MBR seems to help my eyes a bit)

[A Solid lad]

Hmmm... do I have to upgrade my gfx card, just to get lower dpclat? gah...

I'm now in the process of trying out different drivers, doing a DDU uninstall before every install.
I've your installed, and I get dpclat that is fluctuating between 13-22-32...jumping from one nimber tonthe other... horrible, compared to my older drivers.

I've sold my Benq 1 hour ago... a guy came for it himself. (150 eur...couldn't ask more, since the xl2411 can be bought new for around 240...)
So testing with that, won'r be possible... but I might test with the Dell and LG.

[A Solid lad]

I will only bother to test on the LG when I found a driver working well with the alienware...

[giubox360]

Hmmm... do I have to upgrade my gfx card, just to get lower dpclat? gah...

I'm now in the process of trying out different drivers, doing a DDU uninstall before every install.
I've your installed, and I get dpclat that is fluctuating between 13-22-32...jumping from one nimber tonthe other... horrible, compared to my older drivers.

I've sold my Benq 1 hour ago... a guy came for it himself. (150 eur...couldn't ask more, since the xl2411 can be bought new for around 240...)
So testing with that, won'r be possible... but I might test with the Dell and LG.

It's strange every driver works differently with a different monitor, so let us know what is the best driver for you. (your actual driver is? )
At the moment, I'm trying to understand how could be also the Alienware 240hz freesync if I can let myself without MBR.
Because your review was very nice.


I'm just a bit scared about 2 things:
1) games where I can't keep 240 fps (so I can't set any MBR to keep the game sharp )
2) the blue trials and/or overshots with the fast/fastest overdrive.

One last thing, can you please explain to me why do you think that the alienware is less washed out than the LG, please?
why do you think also that the alienware is more responsive while playing?
Thanks in advance.

this is an other nice review comparing response time and input lag of some 240 hz Panels with the new LG:

https://nl.hardware.info/reviews/7841/8 ... n-inputlag