Help Dual GPU Alchemist and Battlemage Issue

[Wizhhh]

This issue happened several times up till now, suddenly arc A750 not detected in task manager, also device manager display adapter, but show up in hidden devices with code 45. I know its not bad connection with pcie slot because when it was detected it function normally. When its single slot it work normally, both gpu is normal. I just shutdown my pc for a while or turn on in next day it wont show up/detected. Happened about 5 times maybe.  And also please help directx12 performance with B580 really poor compared A750 in RDR2. 

[Nikhil_Intel]

Hello Wizhhh,

Thank you for posting on the Intel Community Forum.

Thank you for clearly explaining the issue — it really helped us narrow this down.

Please try the following steps:

For Arc A750 not detected (Code 45):

1. Disable Fast Startup in Windows and perform a full shutdown, then power on.
2. Update your motherboard BIOS to the latest version.
3. Perform a clean graphics driver reinstall using DDU, then install the latest Intel Arc driver.

For low performance in RDR2:

1. Switch the in-game Graphics API to Vulkan (recommended for Arc GPUs).

These steps should help stabilize GPU detection and improve performance.

[Nikhil_Intel]

Hello Wizhhh,

Since I haven't received a response from you, I will be closing this inquiry. If you need further assistance, please submit a new question, as this thread will no longer be monitored.

Best regards,

Nikhil

Intel Customer Support Technician