All laptops with a MUX switch

That makes sense. G-Sync on FreeSync monitors was enabled through drivers at beginning of this year.

 

Interesting, I wonder if the N173HHE-G32 would then allow for Gsync. I dont desire it personally, just a curious scenario.

Anyways a MUX laptop list would be dope.

 

I believe MSI GT-series laptops using that panel such as the GT73 and GT75 do support G-Sync. Installing the same panel in a different laptop however would not allow you to enable G-Sync.

 

It's no loss to me, I plan to get another one anyways to replace my glossy panel.

 

Yeah it's a great panel, G-Sync or not.

 

Didn't read this whole thread, but I assume the Lenovo Legion Y545 has been mentioned as having a MUX. What I really like about this particular laptop is that you can change which mode you want through either the BIOS or Lenovo's Vantage software.

 

Hi there, this is newbie.
You said that tested on 165hz 1440P, both optimus mode and DGPU-only-mode, and you see that there were no difference about input lag in both case.
I have a question. When you tested the input lag of Optimus mode, Did you check the Optimus laptop's DGPU was certainly activated and currently running?

If you didn't, the test could be in wrong condition.
The test is to measure the input delay added by Optimus mode at using DGPU.
So, It shoud compare the following case : (DGPU-only mode by muxed) vs (DGPU activated mode by optimus). Should NOT the case : (DGPU-only mode by muxed) vs (DGPU deactivated, but IGPU is running mode by optimus).

Did you tested (DGPU-only mode by muxed) vs (DGPU activated mode by optimus) certain?
Your no-input-delay opinion is very surprising and i also wonder how the test was proceeded.

Thanks for listening my poor english.

 

When usin gan external high refresh rate gsync monitor, you have to disabled and re-enable the iGPU to prevent stuttering because of a driver bug. This is a sign that the iGPU is active and running in optimus mode (control panel are accessible now as well which arent available in discrete only mode). I double checked this by using the internal monitor itself but because of the 60hz limit, it would be harder to perceive input lag if it was there so it wasnt my primary test case.

I did the test by putting my camera in slow mode recording and recording my mouse click and screen in one single composition the click and reaction on screen for both in optimus and without optimus enabled. After this I counted the frame between the click and action on screen in Adobe premiere and there was no perceivable input lag except for some small variance without an identifiable pattern. Optimus in the early days had input lag but they have been improving it for years now. Some people claim input lag on the RTX series but currenly I dont have an RTX laptop with a MUX switch.

 

I hear you the p73 and p53 can switch back and forth

 

Anybody ventured into these settings on the Razer Blade Pro series? I'm scared I'm just gonna have a black screen brick if I mess with these settings but I would love to be able to set up VFIO passthrough on a Linux host, currently in Optimus mode I cannot get it working.

 

Which blade pro? The 4k 120hz model has a mux and supports disabling optimus. It has a different motherboard part number than others. I wouldn't try it on a non 4k 120hz blade pro unless you have a way of undoing your handiwork.

 

I'm on the Razer Blade 17 Pro here - I found the option in the BIOS and sadly it only shows "Muxless" as an option.

Ahh that's good to know, I might consider the switch over.

 

Do any of the Gigabyte Aero series have a Muxed option?

 

Upcoming MSI GS66 laptop is going to have a MUX switch. No mention of G-Sync yet, but at least dGPU mode will be available via MSI software reboot and most likely via a BIOS option hidden or exposed. Looks like brands are finally starting to listen to us.

 

I dont know if this counts, but the mech 15 1070 can be tricked into running with the on board intel uhd graphics as its main display without knowing the 1070 is there. It technically neither has gsync or optimus, so kind of weird. It also has duel bios reset buttons on the mother boards.

 

Likewise, an early owner on Reddit has confirmed the 2020 Razer Blade 15 Advanced has a GPU mode option in Synapse. Frankly, I'm not sure how the 300hz display would be handled without a mux because I think the per lane bandwidth requirement for a 1080p, 300hz display exceeds Intel's graphics spec. Other 300hz laptops (Acer Triton 500, Asus S17 / GX701, etc.) have also used a mux.

 

Working on the list now within the OP. I was motivated after using a laptop with a MUX over the last 6 weeks

 

considering how many laptops are out there, it's shocking the list isn't pages-long

the manufacturers just don't see it as a strong selling point?

EDIT: I see there are posts throughout the thread of people contributing info. Would this be better as a wiki or something, instead of relying on B0B having to single-handedly manually update everything? (although I guess as a gatekeeper he can verify/ensure the info is accurate opposed to a wiki...)

 

Update on this: Running VESA Adaptive Sync (FreeSync) over the mDP port to an LG 27GL83-A monitor works, on Windows and Arch Linux.

 

So, if the BIOS GFX is set to either PEG or IGFX does the Alienware On Screen Display (OSD) do anything or serve any purpose?

 

@B0B

Alienware 13 R3 doesnt have a MUX switch. Fn +F7 does nothing at all

 

It allows you to change the primary display output card through Windows. Additionally, it gives warnings about using FN + F5 to switch to integrated graphics for optimal battery life if you're in dGPU only mode. That's it.

 

I'm aware of what the switch does in switching between which GPU will be used and the optimal battery message for batterry efficiency; I'm assuming this switch only works if the BIOS selection is the Optimus setting of the SG selection. However, I want to know what this switch does if the BIOS is either set for the PEG or IGFX selection or maybe the switch doesn't even do anything at all if one of these selections is chosen.

 

On the FHD version?

 

correct, when I use the Fn key reboot to dGPU it results in the same things occurring.

 

Hello everyones,

can we try to state on recent models that have a mux switch these recent days.
I especially focus currently on my side on the Zenbook Pro (or Zephyrus) Duo (UX582) and the Razer 2021 models (where some peoples saying some models got a mux switch for the 2020 models but it's unclear which are muxless and which don't).

Thanks for clarifications.

 

The Razer Blade Advanced 15 and Pro 17 from 2020 and onward have a mux that is controlled via the Synapse software.

 

Hey guys, nice thread, I like it!
This might be redundant of a question so I apologize if it's been asked in previous pages.
Are there any current laptops supporting a complete and independent switch between dGPU and iGPU? The MUX switch laptops I see today would give you Optimus (MSHybrid) and Discrete only options. My wish would rather to have an iGPU only mode where the battery life would be maximized (This reminds me of the old MSI GT 73 and 83 models where a physical switch was possible). I hate Optimus and that's why I'm asking this.
Thanks in advance!