Leo went back to the thread. Deep in the comments, someone mentioned a "DSDT override" to bypass the 4GB memory map limit. It was digital open-heart surgery. He typed lines of code he didn't understand into a terminal that looked like it belonged in a Cold War bunker. . He rebooted.
Thunderbolt 3/4 generally does NOT need this tool — it works out of the box on modern Windows 10/11. Diy Egpu Setup 1.35 Free WORK