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2016 monitor LG 23MP68VQ Can't overclock a single hz!

post #1 of 19
Thread Starter 
Hello, I recently bought a new monitor, the LG 23MP68VQ ( also called 23MP68VQ-P).
The color/visual quality is superb even compared to my previous IPS monitor, Dell u2312hm ( A06 rev ).
75hz and freesync are also VERY enjoyable.

Unfortunately, my hopes to overclock the monitor to 80-85hz seemed to have failed. I downloaded CRU software and patched my HDMI connection with the given patch in CRU guide (I use hdmi 2.0 cable so it must be enough for everything of itself).

I haven't played much with CRU before so MAYBE I made some mistakes. Though I basically just tweaked the refresh rate and tried the rest of the settings on manual (copy-pasted from what was on standard refresh rate of 75%), LCD standard and LCD native.

Basically nothing worked. At first I tried 80hz, then I went as low as 77hz and when I tried to change into these refresh rates with all the different timings the monitor always gave me a message "HDMI - out of range".

I then tried turning off Freesync and "response time" in monitor settings. Restarted PC and tried again and it didn't change anything.

I assume there is some kind of a software block on my monitor that prohibits it from using more than 75hz ? Is there ANY way to circumvent this?

Perhaps something in CRY settings called "extension blocks" affect this? Some other things I've failed to think of?
Perhaps something in this guide could also be used to extend my LCDs refresh rate? http://wccftech.com/amd-freesync-hack-expands-refresh-rate-range/

I'm pretty sure it can't be possible that my monitor only manages to work at 75hz but can't even try 77hz. Surely it's an issue of some kind of a "block" and not hardware limitations (unless there are artificial hardware limitations).

If you, the reader, could think of anything I could try to extend my refresh rate beyond 75hz, please let me know! I'm sure it would also be useful to others using this monitor since it is so new and there is still so little information about it.
post #2 of 19
Thread Starter 
*bump*
post #3 of 19
.
post #4 of 19
You won't be able to overclock if the panel isn't designed to do so. Check back the "kHz" value the display can signal with and compare it to your current value. The proportion is your overclock potential.
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The Machine
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Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
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Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
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post #5 of 19
Thread Starter 
Quote:
Originally Posted by mtcn77 View Post

You won't be able to overclock if the panel isn't designed to do so. Check back the "kHz" value the display can signal with and compare it to your current value. The proportion is your overclock potential.

How do I check that "kHz" value? Doesn't sound like it could be it. A monitor running at 75hz flawlessly can't possibly fail to launch at 76hz?
post #6 of 19
You still have the manual? It should be there in panel specifications.
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Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
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The Machine
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Nexus 7 2013
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Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
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Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
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post #7 of 19
Thread Starter 
Quote:
Originally Posted by mtcn77 View Post

You still have the manual? It should be there in panel specifications.

the only place I found any frequencies noted is:

Frequency
D-sub(H-Frequency) 30kHz~83kHz
D-sub(V-Frequency) 56Hz~75Hz
HDMI(H-Frequency) 30~83kHz
HDMI(V-Frequency) 56~75Hz


Doubt it's any of that.
post #8 of 19
Quote:
Originally Posted by Kristijonas View Post

the only place I found any frequencies noted is:

Frequency
D-sub(H-Frequency) 30kHz~83kHz
D-sub(V-Frequency) 56Hz~75Hz
HDMI(H-Frequency) 30~83kHz
HDMI(V-Frequency) 56~75Hz


Doubt it's any of that.
There. You need CRU in order to overclock; however you are already cutting it very close with standard timings(60Hz@67.5kHz) at 75Hz.
The Machine
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Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
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CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
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The Machine
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Nexus 7 2013
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CPUMotherboardGraphicsRAM
A10 6800K Asus F2A85-V MSI 6870 Hawx, VTX3D 5770, AMD HD6950(RIP), Sap... G.skill Ripjaws PC12800 6-8-6-24 
Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
Hard DriveOSMonitorKeyboard
32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
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3950mAh/15.01mAh Battery Stereo Speakers 
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post #9 of 19
Thread Starter 
75Hz is the standard refresh rate of my monitor.
How do you discern I am cutting close? Anyway, I should be able to overclock at least to 76hz, right? I'm still searching for a way to overclock this monitor
post #10 of 19
I'm comparing it to the standard frequency table. You know, there are display transmission standards right? The kHz value is what sets the scaler. If you have an 83 kHz compliant scaler: that is what you have, end of story. You can reduce timings via CRU, however you will start remittently skipping frames and it will look horrible. You need to sort out what vertical line value gives you the least KHz/Hz residual over the longest spans of time.
Still and all, why do you want to overclock it, anyway? You normally overclock just to avoid frame skipping whereas you have FreeSync - it scales the timings for you. The gpu too fast? Enhance the visual settings a little bit more. You are supposed to interleave some frametime latency in the upper threshold anyway so that the display engine doesn't get overloaded.
PS: 76 Hz and 76 Hz that is.
  1. You can reduce vertical timings until 1092 total,
  2. 1090 is a *perfect match*,
  3. Just reduce vertical "back porch" from standard timings to '1' and you are set.
Also, activate 'alternative DVI mode' within the driver.
Best of luck!
Edited by mtcn77 - 7/20/16 at 7:46am
The Machine
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Nexus 7 2013
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CPUMotherboardGraphicsRAM
A10 6800K Asus F2A85-V MSI 6870 Hawx, VTX3D 5770, AMD HD6950(RIP), Sap... G.skill Ripjaws PC12800 6-8-6-24 
Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
Hard DriveOSMonitorKeyboard
32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
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3950mAh/15.01mAh Battery Stereo Speakers 
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The Machine
(14 items)
 
Nexus 7 2013
(11 items)
 
 
CPUMotherboardGraphicsRAM
A10 6800K Asus F2A85-V MSI 6870 Hawx, VTX3D 5770, AMD HD6950(RIP), Sap... G.skill Ripjaws PC12800 6-8-6-24 
Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
Hard DriveOSMonitorKeyboard
32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
PowerAudio
3950mAh/15.01mAh Battery Stereo Speakers 
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