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

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k2viper
Posts: 293
Joined: 23 Jan 2018, 06:30

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

Post by k2viper » 11 Apr 2019, 12:01

bcle23 wrote:Is the custom resolution settings you have screenshotted on the first post only supposed to work with Reduced Motion Blur on? Whenever I change to Freesync (G-Sync Compatible,) the screen keeps turning off and on
No, custom resolution would work and fix stuttering regardless if MBR is on or off.
Describe your problem further.

Romiyo
Posts: 20
Joined: 04 Apr 2019, 02:52

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

Post by Romiyo » 16 Apr 2019, 06:05

Does anyone know how do you check what firmware your monitor is currently running? Thanks.

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k2viper
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Joined: 23 Jan 2018, 06:30

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

Post by k2viper » 16 Apr 2019, 09:22

Romiyo wrote:Does anyone know how do you check what firmware your monitor is currently running? Thanks.
Service menu (see first post).

skri170392
Posts: 8
Joined: 30 Mar 2019, 00:33

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

Post by skri170392 » 20 Apr 2019, 06:38

k2viper wrote:
Hello guys,
Anyone using this new display yet?

http://www.lg.com/us/monitors/lg-27GK75 ... ng-monitor

Just ordered it, hope I'll get my hands on it on weekend or monday.
Picture on LG's off.site displays OSD: blur reduction simultaneously on with freesync. An error, probably?
I dont have an AMD graphics card to test freesync, anyway.
UPDATE Nov 2018: Settings for clearest 240Hz blur reduction mode on LG27GK750F-B monitor

Optimal/stable VT 1304 240hz resolution:

Image

It is an overclocked mode, but it is fully safe to use it. It may result in minor display instability: sometimes, depending on how often you open the OSD, display loses sync and goes blackscreen and back on. It may happen once a 2-3 days, may once a 2 weeks. The more you open OSD, the more often these black screens may occur. Easy fix: power cycle the monitor (via joystick button). After the powercycle, the new 2days-2weeks cycle begun. Only happens with high VT like 1300+.

Workaround for frameskipping bug/buffering out of order/stuttering-juddering:
In CRU under extension blocks find a 240hz resolution. By default its Actual Refresh rate is 239,759hz or 239,764hz or may be other number depending on your system, GPU, driver etc. You need to round it and get Actual refresh rate number exactly 239,760. Note that this refreshrate is also stated in user's manual. VT1304 resolution above is already 239,760.
You also may use lower values like 1182-1184 (only 2-4 above default 1180), the point is to get exact 239,760 if it is not exact at defaults.

Service menu: viewtopic.php?f=2&t=4422 , no useful options found though.

"Optimal" settings: I stick with Gamma mode 4, default contrast and black equalizer, 45 brightness, Fast overdrive, MBR on full-time (yes I love blur reduction and CRT-like look!). Personally I found default colors fine enough, but R-G-B are also tweakable.

ICC profile is installed with display INF: http://gscs-b2c.lge.com/downloadFile?fi ... iLocE7WGOw
How to enable ICC profile: http://www.tftcentral.co.uk/articles/ic ... tm#install

Presets: Gamer 1 and Gamer 2 are the only usable profiles, they are fully adjustable. It's not recommended to use any other presets like FPS/RTS etc.

For minimal input lag make sure you choose "Original" scaling mode under Aspect ratio settings. Default is Full wide, and it is like ~1full frame slower then Original! So if you dont absolutely have to, always choose Original mode!
There is no advertised "Dynamic action sync" option found, but in Original mode this display goes on par with best other 240hz screens with 4,5-5,0ms of total input delay

Freesync and Motion blur reduction dont work together, and I have an Nvidia card, so no Freesync experience to share here.


excuse my ignorance and if this question is stupid, is this overlock safe? Since I notice something strange in the image while playing, is it normal and safe to do this? Excuse my ignorance, I'm new and I do not want to force the monitor ... thanks

mushi
Posts: 32
Joined: 02 Feb 2019, 11:46

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

Post by mushi » 21 Apr 2019, 06:05

I use the lower values with success (VT 1182-1184)


our beloved monitor is on the nvidia list compatible g-sync now

skri170392
Posts: 8
Joined: 30 Mar 2019, 00:33

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

Post by skri170392 » 22 Apr 2019, 00:37

mushi wrote:I use the lower values with success (VT 1182-1184)


our beloved monitor is on the nvidia list compatible g-sync now

Thanks ... and that list of nvidia of monitors where I see it?
ya pude copiar el cru de uno de arriba pero no te parece? que se ve borroso cuando juegas?
and then VT 1304 is not safe can damage the monitor and shorten its useful life?
since the vt 1304 for me is more clear and nice but I do not want to shorten the useful life of monitor or damage it .. sorry for my ignorance but I do not want to break it!!

mushi
Posts: 32
Joined: 02 Feb 2019, 11:46

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

Post by mushi » 23 Apr 2019, 12:21

skri170392 wrote: Thanks ... and that list of nvidia of monitors where I see it?
ya pude copiar el cru de uno de arriba pero no te parece? que se ve borroso cuando juegas?
and then VT 1304 is not safe can damage the monitor and shorten its useful life?
since the vt 1304 for me is more clear and nice but I do not want to shorten the useful life of monitor or damage it .. sorry for my ignorance but I do not want to break it!!
* to test for frameskip: follow the instructions on https://www.testufo.com/frameskipping
* if you have frameskip: use k2viper's overclocked settings, or the alternative settings (for me, alternative worked better: https://www.testufo.com/frameskipping])
* if using the alternative settings you have frameskip, and you don't want to use the overclocked settings: try other VT's, always respecting the exact value of 239.760hz . Apply the settings on CRU, run restart64.exe and repeat the frameskipping test. Repeat until there's no frameskipping

There are many persons using the overclocked value. I believe its fine - but if you don't feel confortable, you need to find other values for your monitor. Test, test, test.


Regarding the g-sync compatibility with our monitor, the next nvidia drivers will support it.

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k2viper
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Re: LG 27GK750F-B - 240Hz, 27" 1ms Blur reduction, Freesync

Post by k2viper » 24 Apr 2019, 02:29

I'm using VT 1304 with MBR constantly on for more then a year (since feb 2018), and I see no problems. I beleive this overclock is totally safe. The only downside is described in 1st TLDR post and has a workaround:
k2viper wrote:It may result in minor display instability: sometimes, depending on how often you open the OSD, display loses sync and goes blackscreen and back on. It may happen once a 2-3 days, may once a 2 weeks. The more you open OSD, the more often these black screens may occur. Easy fix: power cycle the monitor (via joystick button). After the powercycle, the new 2days-2weeks cycle begun. Only happens with high VT like 1300+.

shekel
Posts: 23
Joined: 30 Nov 2018, 05:42

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

Post by shekel » 24 Apr 2019, 03:49

k2viper wrote:I'm using VT 1304 with MBR constantly on for more then a year (since feb 2018), and I see no problems. I beleive this overclock is totally safe. The only downside is described in 1st TLDR post and has a workaround:
k2viper wrote:It may result in minor display instability: sometimes, depending on how often you open the OSD, display loses sync and goes blackscreen and back on. It may happen once a 2-3 days, may once a 2 weeks. The more you open OSD, the more often these black screens may occur. Easy fix: power cycle the monitor (via joystick button). After the powercycle, the new 2days-2weeks cycle begun. Only happens with high VT like 1300+.
This depends on the monitor, I've had mine go off every 20-30 seconds, so I just lowered horizontal totals by a little bit more.

daniloberserk
Posts: 37
Joined: 22 Aug 2017, 16:50

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

Post by daniloberserk » 26 Apr 2019, 02:44

Maybe a dumb question but... Should I care about frame skipping if I only play using freesync? Also I never could make 1304 to work, are you guys using AMD or NVIDIA for OC ?

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