Hackintosh Legacy Bios Dual montior Crash

Hello,

I am currently using a legacy X58 system with Hackintosh installed.

I have performed a Post Install with OpenCore Legacy Patcher on macOS Sequoia, and everything works well.

However, there is one issue: the dual monitors are not functioning.

When only one monitor is connected, everything works fine. But when I boot with both monitors connected, the screen flickers and the desktop does not appear.

If I connect the monitors after the computer has booted, the first monitor turns white or pink, and the system stops functioning.

I have tried methods like deleting/installing SSDT-BRG0 or WEG, but the issue persists.

I suspect that this might be due to the Legacy BIOS of the X58 system.

The issue does not occur and everything works well on UEFI-supported Z68 or X79 systems.

Can this problem be resolved?

For reference, I am providing the EFI folder and system specifications.

Specs.

CPU : Intel Core i7-990X Extreme Edition 3.33Ghz (6C12T)

RAM : Corsair Dominator DDR3 2400Mhz 40GB(8x4, 4x2)

GPU : AMD Radeon Vega Frontier Edition 16GB(Use DP)

M/B : ASUS ROG Rampage III Black Edition X58

SSD : SK Hynix P31(Use Converter)

PSU : Corsair HX1200 1200W 80+ Platinum

EFI :

https://drive.google.com/file/d/1TxtHau1cL9c4K1N2kEr0tasXJJIAcT0n/view?usp=sharing