Nanite/Lumen "Not Compatible" on Arc B580 SL - Fortnite

[ynsi]

Hardware: Intel Arc B580 12GB Driver: 32.0.101.8626 CPU R7 5800X - 32gb ram

OS: Windows 11ltcs

Hi, since the recent Fortnite update that unified Ray Tracing and Nanite rendering paths, these features are no longer functional on the Arc B580. Previously (2-3 patches ago), both worked flawlessly.

• The Nanite toggle is clickable, but activating it immediately causes the Lumen setting to display as "Not Compatible" (or disables it entirely)
• The game effectively refuses to enable full Lumen GI/Reflections despite the GPU hardware being capable of it
• Tested with a clean driver install (DDU) and verified Resizable BAR is active

I have already submitted multiple bug reports to Epic Games, but the issue persists after three consecutive updates with no resolution

I have confirmed through other technical forums that I am not the only Arc B580 user experiencing this exact same regression.

[Chawan_Intel]

Hello ynsi,

Thank you for posting on the Intel Community Forum

Greetings from Intel Customer Support.

Thank you for reaching out and for providing such a detailed explanation of the issue. I understand your concern regarding the Nanite and Lumen features no longer functioning as expected in Fortnite after the recent update, despite previously working correctly. I truly appreciate the troubleshooting steps you have already performed.

To help us further isolate and investigate the issue, I kindly request you to provide a few additional details:

• Are you currently using the latest version of Fortnite after the recent update?
• Does this issue occur only in Fortnite, or have you observed similar behavior in other games?
• Have you tried rolling back to a previous graphics driver version where the features were working?
• Have you tested with default in-game settings before enabling Nanite/Lumen?
• Is Resizable BAR enabled and active in your system?
• If available, please confirm whether the issue occurs across different DirectX modes

Additionally, I kindly request you to share the SSU (System Support Utility) log so that we can review your system configuration in detail.

You can download the SSU tool using the link below:

https://www.intel.com/content/www/us/en/support/articles/000057926/memory-and-storage.html

Please note: While generating the SSU report, kindly uncheck the “Networking” option.

Once we have this information, we will be able to investigate further and assist you with the next steps.

Thank you for your cooperation and patience.

Best Regards

Chawan

Intel Customer Support

[ynsi]

Hello Chawan,

Thank you for the followup. Here are the specific details and the answers to your questions:

• Fortnite version: I am confirmed to be using the latest version of Fortnite

• Other games: This issue is currently specific to Fortnite

• Driver Versions: I am currently using 32.0.101.8626. However, I have information from other users that this same regression persists in the latest 8629 version as well
• Default settings: I have tested with default in-game settings, but the "Not Compatible" error persists when trying to enable Nanite/Lumen

• Resizable BAR: Yes resizable BAR is enabled and active in my system BIOS

• DirectX modes: Nanite and Lumen require DirectX 12 in fortnite. I have already tested switching to DirectX 11 and then back to DirectX 12 to see if it would trigger a re-detection of the GPU capabilities, but the issue remains the same

I have attached the SSU log (with Networking unchecked) to this reply for your review.

Thank you for your help.

[Nikhil_Intel]

Hello ynsi,

I hope you are doing well.

Thank you for the detailed follow-up and for providing all the requested information. We appreciate your effort in testing different configurations, including DirectX modes, default settings, and confirming Resizable BAR status.

I would like to inform you that a new graphics driver has been released. Please download and install the latest version from the link below and check if the issue still occurs:

https://www.intel.com/content/www/us/en/download/785597/intel-arc-graphics-windows.html

Additionally, we recommend updating your system BIOS to the latest version available here:

https://www.msi.com/Motherboard/B550M-PRO-VDH-WIFI/support

After completing both updates, please test Fortnite again and let us know the results, particularly whether Nanite and Lumen can be enabled without the compatibility error.

Your feedback will help us determine the next steps.

Best regards,

Nikhil

Intel Customer Support Technician

[ynsi]

Hello Chawan,

I have followed your recommendations and installed both the latest motherboard drivers and the new graphics driver 32.0.101.8724. However, the issue remains exactly the same Nanite and Lumen RayTracing are still reported as not compatible in Fortnite.

I want to emphasize that this problem started exactly after a Fortnite update about a month ago. I was using the same GPU driver 32.0.101.8626 at that time, which proves the game update triggered the issue.

In my opinion, the root of the problem is on Epic Games' side, but as individual users, our reports to them are often ignored. However, since this affects the compatibility and reputation of Intel Arc GPUs, I was hoping you could escalate this to your engineering team so they can reach out to Epic Games directly, if possible

I found some forums where other users have this same problem, but I'm not sure if external links are allowed here

[Chawan_Intel]

Hello ynsi,

Thank you for your response and for taking the time to test the latest updates. We truly appreciate the detailed information you have shared.

As you mentioned that the issue appears to have started after a recent update from the game side, it is possible that this behavior is related to changes within the game itself.

We will make sure to share your feedback with our internal team for further review. However, in this situation, we would recommend reaching out to the game developer (Epic Games) for further assistance, as they would be best positioned at the moment to review and address any compatibility concerns introduced by recent updates.

Please continue to ensure that your system drivers and updates are kept current. If you notice the issue occurring outside of this specific application or in other workloads, kindly let us know and we will be happy to assist you further.

Thank you for your understanding and cooperation.

Best Regards

Chawan

Intel Customer Support

[Chawan_Intel]

Hello ynsi,

I hope you are doing well.

I wanted to follow up regarding the issue you reported. As discussed earlier, it appears that the behavior may be related to recent updates from the game side.

Could you please let us know if you have reached out to the game developer (Epic Games) for further assistance? If so, we would appreciate it if you could share any updates you have received.

Additionally, if you notice the issue occurring outside of this specific application or in other workloads, please do inform us, and we will be happy to assist you further.

Thank you for your continued cooperation. I look forward to your response.

Best Regards

Chawan

Intel Customer Support

[Flying-Dutchman77]

Hi,

I am having the same exact issue and contacted Epic games.

This was the e-mail i got back from them:

Hello,

Nice to meet you and thank you for contacting our support.

I understand you no longer use Lumen as Ray Tracing is not available and Im sorry to hear about it.

However in this case I would strongly suggest contacting Intel directly to confirm this model is fully capable of using Ray Tracing under this link: https://www.intel.com/content/www/us/en/support.html

I know this is really important and I would like to have better news for you. But there is little we can do as some functions needs to be supported by card that why best way will be contact manufacturer directyly.

Thank you for you understanding and if you have any other question or concerns please let us know.

Best regards,

Epic Games Support

[Chawan_Intel]

Hello ynsi,

I hope you are doing well.

I wanted to follow up on the issue you reported. As mentioned earlier, the behavior may be related to recent updates from the game side.

Could you please confirm if you have reached out to the developer (Epic Games) for further assistance? If yes, kindly share any updates you may have received.

Also, if you observe this issue occurring outside of this specific application or in other workloads, please do let us know we’ll be happy to assist you further.

Looking forward to your response.

Best Regards

Chawan

Intel Customer Support

[ynsi]

I've already contacted epic, but they just sent me a guide on how to activate it ingame, as if I didn't know how. Thanks anyway. I no longer have an intel gpu, but a user right here also got in touch with them and redirected them to you guys.

[ynsi]

Hi chawan, 

I've already contacted Epic, but they just sent me a guide on how to activate it in-game, as if I didn't know how.

Thanks anyway. I no longer have an intel gpu, but a user right here also got in touch with them and redirected them to you guys.

[Chawan_Intel]

Hello ynsi,     

Thank you for the update, and I understand your frustration especially when the response you received didn’t really address the issue.

Noted that you are no longer using an Intel GPU. However, for reference, there has been a newer graphics driver 32.0.101.8735 released recently. If you or the other user you mentioned still have access to an Intel GPU system, it would be worth installing the latest driver and checking if the issue persists

Intel® Arc™ Graphics - Windows*.

If the issue is still observed on an Intel GPU with the latest driver, please feel free to share the details and we’ll be glad to assist further.

Thank you for your time and for keeping us informed.

Best Regards

Chawan

Intel Customer Support 

[Chawan_Intel]

Hello ynsi,  

I hope you are doing well.

I just wanted to follow up regarding the information shared earlier about the Intel® graphics driver update.

Kindly let us know if you had the opportunity to check the latest driver version 32.0.101.8735 on a system with an Intel GPU, and whether the issue is still being observed after the update.

If the issue persists, please feel free to share the details with us, and we will be happy to assist you further.

Looking forward to your update.

Thank you for your time and cooperation.

Best Regards

Chawan

Intel Customer Support 

[TajemnikTV]

I've reported a similiar issue on Epic's Forums - also mentioned this thread. 

They've yet to confirm the bug, as of 05.05.26, but my hopes are high. Hoping this issue will be resolved along with a fix for software lumen being blocked on cards with no RT cores. I'd suggest reporting such issues there, instead of contacting Epic via e-mail/support, as this is an official bug tracker it seems. 

https://forums.unrealengine.com/t/fortnite-v40-00-regression-lumen-gi-reflections-unavailable-on-non-hwrt-gpus-software-lumen-path-appears-blocked/2719652

Might be worth chiming in, I could repurpose that report as a general Lumen regression for other platforms I guess (if this hasn't been fixed by new Intel drivers)