Hi, and welcome to forum!
So, I need to enable bifurcation on my ASRock X99 Extreme4 for PCI-E to use more than one NVMe drive in my PCI-E adapter, that has 4 slots for NVMe drives. No such option in BIOS, and by default - as expected - only first drive is detected. Using Xeon E5-2697 v3 CPU, so PCI-E lanes shouldn't be a problem.
My current configuration is: GPU in first PCI-E slot, and NVMe adapter in third slot - and want to set bifurcation on that 3rd slot.
Tried to do it by myself with AMIBCP > IntelRCSetup > IIO 0 (tried on other IIO's aswell), and setting IOU1 (tried also IOU0) to x4x4x4x4 mode, as in the screenshot. But, uhm - it doesn't work, other drives than first still not visible.
Attaching BIOS dump, done with AFUDOS (FPT actually doesn't want to work with this motherboard). It's based on 3.60 version.
Just as a notice, this BIOS is already modded with Turbo Unlock and CPU undervolting mod - don't want to lose those![Wink Wink]()
Not really sure what I'm doing wrong, but options, solutions or ready-to-go BIOSes are welcome.
Thanks in advance for help!
Screenshot 2023-06-06 231225.png (Size: 72.3 KB / Downloads: 1)
X99U30BI.zip (Size: 5.57 MB / Downloads: 0)
So, I need to enable bifurcation on my ASRock X99 Extreme4 for PCI-E to use more than one NVMe drive in my PCI-E adapter, that has 4 slots for NVMe drives. No such option in BIOS, and by default - as expected - only first drive is detected. Using Xeon E5-2697 v3 CPU, so PCI-E lanes shouldn't be a problem.
My current configuration is: GPU in first PCI-E slot, and NVMe adapter in third slot - and want to set bifurcation on that 3rd slot.
Tried to do it by myself with AMIBCP > IntelRCSetup > IIO 0 (tried on other IIO's aswell), and setting IOU1 (tried also IOU0) to x4x4x4x4 mode, as in the screenshot. But, uhm - it doesn't work, other drives than first still not visible.
Attaching BIOS dump, done with AFUDOS (FPT actually doesn't want to work with this motherboard). It's based on 3.60 version.
Just as a notice, this BIOS is already modded with Turbo Unlock and CPU undervolting mod - don't want to lose those

Not really sure what I'm doing wrong, but options, solutions or ready-to-go BIOSes are welcome.
Thanks in advance for help!

