May I ask the reason for upgrading your BIOS?
Which risers are you using?
Maybe you can try this, it worked for me on that motherboard:
I removed the working GPUs, and boot the board only with the GPU that doesn't work.
Reinstall the GPU drivers.
Shutdown.
Add the other GPUs.
Reboot.
All GPUs were visible in my case.
Topic: z270-p asus only showing 7gpu but not 8 gpu!!!! please help - page 2. (Read 1755 times)
motherboard: PRIME z270-p (before updates to 0610 is 0320)
processor: intel G4400
GPU: 5xGTX1070 3xgtx1060
PSU: AXI-1500 CORSAIR
RAM: 8GB
i upgrading the bios version to 0610. {4g >enable} > {all to gen1} >{m.2 (only showing one )>PCIE}>{HD>diable} > {fast boot}. i saw many people has M2_1 M2_2 but mine one is just one. after insert one by one until the 8gpu it only show me 7gpu is working. help thank you!!! i have try almost 3day also cant solve this. wanna cry
processor: intel G4400
GPU: 5xGTX1070 3xgtx1060
PSU: AXI-1500 CORSAIR
RAM: 8GB
i upgrading the bios version to 0610. {4g >enable} > {all to gen1} >{m.2 (only showing one )>PCIE}>{HD>diable} > {fast boot}. i saw many people has M2_1 M2_2 but mine one is just one. after insert one by one until the 8gpu it only show me 7gpu is working. help thank you!!! i have try almost 3day also cant solve this. wanna cry
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