G-Sync problems. AW 18 GTX 1070

Right I have a Alienware 18 with a 1070 which I upgraded to with modded drivers and am only able to use through SG mode. I’ve connected my laptop via DP to the monitor which is a Acer Predator X34P. I am unable to use g-sync as in the nvidia control panel there isn’t an option for display. I have the latest intel drivers installed. Even when I’m overclocking refresh rate to 120Hz in the OSD and go into intel options max refresh rate is 60Hz. Anyone know how I can get around this and be able to use g-sync?




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I have an Alienware 18 with 780m SLI and Intel 4600. Dual boot Win10 and Kali linux
Strangely, on Windows 10 i cannot get more than 60MHz refresh even with Nvidia. On Kali linux i can get 120Hz even with the Intel 4600.
199,94Hz exactly.

 

Nice. 60 FPS @ 3440x1440 sucks tbh


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What i mean: The refreshing difference (in my case) looks like to be an OS problem and not a driver problem or hardware problem.

You should boot on a live linux and make a test

 

I wouldn’t know where to start tbh.


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I have an Acer GD245HQ connected. But with this Acer monitor i cannot get more than 60Hz too. Maybe because i have HDMI connection and not DVI

 

Yes on mine hdmi only supports upto 50Hz. DVI for higher resolutions.


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You can't use G-SYNC using SG mode. Only PEG would allow these features.

One of the limitations using Optimus.

 

bingo

 

Thanks for clearing that up. So am I limited to 60Hz then even though I have a monitor capable of 120Hz?


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Whatever the max of DP 1.4 or whatever revision is on the AW 18

 

Yes been trying to look it up but to no avail.


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AW 18 has 1.2 iirc, which is around 17.28Gb/s
3440x1440 @ 120 needs 17.92Gb/s
Oof
https://en.wikipedia.org/wiki/DisplayPort#Compatibility_and_feature_support
https://k.kramerav.com/support/bwcalculator.asp

 

The thing is I can’t even get over 60Hz. I went into intel control panel and try setting a custom resolution but no luck. Get that message to say it’s not supported.


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Try using CRU or the Nvidia drivers, iirc the mDP port should be connected to the dGPU instead of iGPU
Also, intel drivers don't let you set custom res's anymore

 

See with me having the 1070 which I’m using through SG mode I can only connect via the iGPU. That’s where I think I’m stuck.


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Yes I know, I believe the mDP port is dGPU only with a dGPU active at all

 

What is the native refresh rate of the monitor you are trying to use?

What I did on my M18xR2 to get to 85Hz was to flash the EDID of the monitor because native was 60Hz. This was the only way to bypass the intel limit.

If you monitor has a native refresh rate of 100hz+ then it should show up. But if the resolution/refresh rate combo is too high for mDP 1.1 then it won't work.

 

I think it’s 100Hz native overclockable to 120Hz


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Looks like 3440x1440 @ 100hz (120Hz overclockable)

Unfortunately mDP only supports up to 3440x1440 @ 60Hz I believe so you won't be able to do 100hz even.

This is a Optimus limitation. Your 980M SLI setup wouldn't have had this issue.

 

Do you think if I went to a single 980m, would it be sufficient?


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Single 980m in PEG will allow 3440x1440@ 120hz to work however, it is 50% the speed of 1070 so I doubt you'l be even able to reach the framerates.

 

Yes what a shame. Well I’m going for a desktop with a 1080ti. Keep laptop for gaming on the move.


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In fact, I connected the M18R3 to an external monitor and successfully turned on G-sync in peg mode.

 

In PEG mode it will work. In SG mode which I’m in you lose all options in nvidia control panel apart from 3D.


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Single 1070 would seriously struggle with 3440x1440 anyways. In newer games my 1080 Ti under full water-block @ 2025 MHz struggles to produce 75 FPS (Mafia 3, No Man's Sky etc.) but slightly older games, say Shadow Warrior 2, and it's 100-120 FPS everywhere maxed out. Same with Destiny 2. Considering a 1070 is roughly half as fast as 1080 Ti, you would be around 60 FPS with slightly older games and newer, more demanding titles may be 40 FPS or so, even with some settings turned down.

GTX 1070 really isn't a 1440p UW card, it's a great 1920x1080 - 2560x1440 card though, depending on the title.

My signature specs are outdated, here's my latest build, but with an Alienware AW3418DW (same panel as X34P) with both monitors on monitor arms (PG278Q). I intend to do a channel / build update soon:




BTW, I'm considering selling my M18xR2, which I haven't used in over two years. It has an i7 3920xm and a single 980M. Nebula Red. It needs a boot drive, other than that no issues. PM all offers.