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My GPU keeps going down when I'm playing Roblox, and it pisses me off.

Bacon The Great 60 Reputation points
2025-10-30T03:43:33.2333333+00:00

So, here's the issue. Every time I play Roblox, my game will sometimes lag for a bit, making my fps go below 20, then it'll go back to my original fps. Not a pretty bad issue, but it makes me so annoyed and bothered that I've tried multiple tutorials on how to fix it. But it does not get resolved. Sometimes it doesn't lag at all, then when I relaunch it. It suddenly lags.

I have two GPUs
GPU1: Intel(R) UHD Graphics 640
GPU2: NVIDIA GeForce 940MX

I mostly use GPU1 since GPU2 keeps lagging my game nonstop.

Laptop Specs:

Device name DESKTOP-OQDGKM3

Processor Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz (1.99 GHz)

Installed RAM 16.0 GB (15.9 GB usable)

Device ID A0DAC658-97C6-49F2-AE88-7C2F088D5224

Product ID 00325-96194-93446-AAOEM

System type 64-bit operating system, x64-based processor

Pen and touch Touch support with 10 touch points

Windows for home | Windows 11 | Gaming
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  1. Lester Bernard Reyes 64,405 Reputation points Independent Advisor
    2025-10-30T04:19:20.2366667+00:00

    Hi, I'm Bernard, a fellow Windows user. I'm happy to help!

    I understand the issue you have. There is nothing to worry about. I am here to assist. This issue occurs when there is a miscalibration with the GPU or when there are services that interrupt the process. To sort out the issue, kindly follow the steps below:

    Let us run a clean installation of the Nvidia driver. This is different from doing DDU or updating the driver, as this will remove all entries and replace them with compatible ones. Kindly follow the steps from the link below:

     

    https://nvidia.custhelp.com/app/answers/detail/a_id/10/~/geforce-experience-driver-installation-failed.-how-do-i-manually-clean-install#:~:text=%20How%20do%20I%20manually%20clean%20install%20the,installation%20process%2C%20close%20any%20programs%20which...%20More%20

     

    Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

    Method 2. Do a clean boot:

    A “clean boot” starts Windows with a minimal set of drivers and startup programs, so that you can determine whether a background program is interfering with your game or program.

    • In the search box on the taskbar, type msconfig and select System Configuration from the results.
    • On the Services tab of System Configuration, select Hide all Microsoft services, and then select Disable all.
    • On the Startup tab of System Configuration, select Open Task Manager.
    • Under Startup in Task Manager, for each startup item, select the item and then select Disable.
    • Close Task Manager.
    • On the Startup tab of System Configuration, select OK. When you restart the computer, it's in a clean boot environment.

    Troubleshooting reference: https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows

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  1. Q&A Assist
    2025-10-30T03:43:48.91+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    It sounds like you're experiencing performance issues with Roblox, particularly related to your GPU usage. Here are some steps you can take to potentially resolve the lagging issue:

    1. Switch to the NVIDIA GPU: Since you have both Intel and NVIDIA GPUs, you might want to try using the NVIDIA GeForce 940MX for Roblox instead of the Intel UHD Graphics 640. This can be done by modifying the graphics settings in Windows:
      • Go to Settings > System > Display > Graphics Settings.
      • Add Roblox as a classic app and select the NVIDIA GPU for it.
    2. Optimize Power Settings: Ensure that your laptop is set to a performance mode when gaming. You can adjust the Windows performance power slider to maximize performance. This can help prevent the GPU from throttling due to power-saving settings.
    3. Check for Background Processes: Make sure there are no unnecessary applications running in the background that could be consuming resources. You can check this in the Task Manager.
    4. Update Drivers: Ensure that your graphics drivers are up to date. Visit the NVIDIA website to download the latest drivers for your GeForce 940MX.
    5. Game Mode: If you haven't already, enable Game Mode in Windows 10 or Windows 11. This can help optimize resources for gaming.
    6. Monitor GPU Usage: Use the Task Manager to monitor which GPU is being used while playing Roblox. This can help you understand if the game is switching between GPUs unexpectedly.

    If the issue persists, consider checking the specific settings within Roblox to see if there are any graphics settings that can be adjusted for better performance.

    References:

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  2. Lester Bernard Reyes 64,405 Reputation points Independent Advisor
    2025-10-30T16:49:48.43+00:00

    You are always welcome and I'm glad it is now all good.

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