Hi all, when adding a 5th GPU to my rig, I run into an issue where it will not boot. There is no POST screen, instead I am greeted with scrambled RGB colors.
I’ve tried swaping out cards, risers, added/removed PSUs (5 different ones). Changed the 1x card, changed the 6-8pin cables and tried moving the cards to different PCIe ports on the motherboard. Any time I hit the 5th GPU, the whole thing scrambles.
Here is what the screen looks like when it tries to boot:
Any ideas out there?
Edit for hardware:
PRIME Z390-P ASUSTeK COMPUTER INC. (2804 04/15/2020)
6 × Intel® Core™ i5-9400 CPU @ 2.90GHz AES
SPCC M.2 PCIe SSD 256GB
Edit: Also updated to the latest BIOS, tried to disable as many PCIe things I could think of like the SATA ports. No luck yet.