Original topic:

2022 NEO G8 G-sync not working at 4K 240Hz

(Topic created: 01-17-2023 07:56 PM)
Chay69
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Monitors and Memory

Samsung Advertises G8 as G-sync compatible but it is only working with G-sync on 120Hz, not on 240 Hz.

I have an RTX 2080, Monitor running firmware 1003 (latest), connected with included DP cable and Nvidia driver 528.02

The monitor only works with G-sync in the 120 hz mode. With 240Hz mode, G-sync is selectable but it's not actually functioning properly in-game monitor's OSD-reported refresh rate (stays locked at 240Hz). And if you try to alt-tab you  will get an infinite black screen.

Is there a fix coming for this? Otherwise the monitor shouldn't be advertised as G-sync compatible, let alone have the label on the product and the box...

More details below on the issue

AT 240hz G SYNC If you ALT+TAB out into the desktop from any fullscreen game you would be shown a black screen when you RE TAB back in.

You would only be able to see the game screen again by using the "window mode shortcut, ALT+Enter" This, Likely due to g sync set to fullscreen only, will revert back to black screen when enter fullscreen again.

Settings that cause issues:

-Enabled 240hz on the G8 with Adaptive sync enabled on the monitor

-Enabled GSYNC (Fullscreen mode or FS + Win mode) in NVCP

Testing done on Drivers: 526.98, 526.86, 522.25, 522.30

***Only occurs when GSYNC is enabled @ 4K 240hz***

***altb tab Issue does not occur when: ***

-GSYNC is off @ 4k 240hz

-@4k 120hz + G SYNC

SPECS:

Win11

AMD 5800x

16GB Ram Asus

X470 StrixF

Gigabyte RTX 2080 Gaming OC

Samsung NEO G8 Monitor is connected to 2080 using samsung supplied DP cable

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6 Replies
Biggus
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Honestly that sounds more like a driver issue (despite the various versions you tried). Monitors themselves don't affect alt-tab behavior in Windows.
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ddaniel51
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Actually according to a few Google searches the RTX 2080 can't do 4k 240.  It's supposed to max out at 144 so 120  is a good compromise.  Do your own searches and read up on what others reported.

 

 

 
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Chay69
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@ddaniel51 

Actually if you read my post correctly The RTX 2080 can do 4K 240hz as it supports DSC,  and I currently can run it at 4k 240hz. The issue I have is it does not work with 4k 240hz with g sync on. Both the NEO G8 and 2080 use DSC in order to work past 4k 120hz due to bandwidth limit of dp1.4

I have done some research and testing turns out its a driver/firmware bug, Where g sync bugs out when DSC is used with it. Nvidia are apparently working on a fix but no eta

 

 

 
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ddaniel51
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My apologies.

 

 

 

 

 

 
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userO8z56FmuLb
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The Neo G8 is not GSync compatible. It only supports Freesync PP. It doesn't even have VESA Adaptive Sync certification - pretty much the base level certification, which is a bad sign for a new monitor. Note that the Samsung S34BG850S does.

The OP says that it's G-Sync Compatible, no it isn't, it's not on the list. This is a big step backwards, not sure why Samsung would do this. I think maybe they mucked up the design or components and just couldn't get either VESA Adaptive Sync or GSync certification. Yikes.

 
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Chay69
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"G SYNC compatible" just means nvidia have tested the it and it meets their requirements. But technically nearly all free sync monitor is should work with g sync and this monitor does Indeed work.

 

 

 
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