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Asus ROG Strix Scar 16 (G634JZ) RTX 4080 is stuttering when using the discrete GPU

Level 9

Got this laptop last June 15 and I noticed that when using Ultimate in GPU mode in the Armoury Crate, games are stuttering really hard to the point that it's unplayable. They're also have lower FPS when the stuttering isn't happening. One of the things I noticed it that the GPU usage fluctuates between 50-99%.

The stuttering disappears once I use Standar in GPU mode which allows me to enable advanced optimus in the nvidia control panel, but that mode is busted too because I can't control the brightness level, the screen's brightness overly bright and it hurst my eye, and my display settings are detecting 2 monitors. So I'm avoiding that mode for now too.

Games which I've obeserved the stuttering:

  • Red Dead Redemption2
  • Cyberpunk 2077

I've yet to test other GPU intensive games, but so far the stuttering isn't present in games like DoTA2, Valorant or other non GPU intensive titles. I've tried using the recommended Nvidia drivers from the device's support page and clean installed my GPU drivers using DDU. I also tried fresh reinstalling windows but still nothing. I don't wanna update my BIOS though cause there seems to be an issue with ASUS laptops in updating the BIOS.


270 REPLIES 270

Level 7

Ok so I'm on my third scar 4090 machine now after sending the other two back. 

Couple of things to note:

This screen is buggy as hell, it's been exactly the same across the three machines. 

A. One of the latest windows updates (ends in 65) breaks the screen completely. After installing this update max brightness of the screen is significantly lower. The only way to rectify this is to uninstall that specific update. 

B. Brightness is buggy in general. After a fresh restart, it loads into windows and then when you click the bottom right hand corner of the taskbar the brightness pops in and your good.

But, what happens quite alot, if you close the lid and it puts it to sleep, when you reopen the lid the brightness is dim doesn't pop back in again, it remains dim until a restart is completed. 

C. The auto switching between the igpu and dgpu is also buggy. For example on a steam game when opening it will switch to the dgpu on the fly, but, it doesnt seem to function when opening a game from the Ubisoft launcher. It stays going through the igpu to get to the dgpu.

These issues have been exactly the same across 3 brand new machines of this device. Clearly the screen in general is just buggy as hell. A shame really, as when it's working and it doesn't what it suppose to do, it's fantastic.

Other than that, it's a great system, it's powerful, it's relatively quiet when gaming on the performance mode, and generally what I've found is they undervolt nicely and are quite stable.

Just that screen. It's great when it's working, but my god the brightness control is buggy as hell.

Probably not going to be fixed I'd assume as Asus are all on the 2024 models now with use a different panel