I recently bought a second hand build, coming from an Intel 6700 build.

 

Motherboard: Gigabyte MZ32-AR0 (Rev. 1.0) - bios updated to R28_F04 (latest)

CPU: AMD EPYC 7551P

Memory: 8 x 16GB Samsung M393A2G40EB1-CRC0Q

GPU: MSI GT 1030 (using it for display only on PCIE_4 slot)

USB Boot Drive: SanDisk Cruzer Blade 8GB USB 2.0

 

BIOS Settings (mostly default except enabling IOMMU):

SVM Mode: Enabled

Legacy USB Support: Enabled

XHCI Hand-off: Enabled

USB Mass Storage Driver Support: Enabled

Port 60/40 Emulation: Enabled

IOMMU: Enabled

 

It keeps hanging at different stages of the usb boot sequence, I think it's memory related but I have isolated to different RAMs and speeds according to QVL Gigabyte.

I've also tried updating to the latest bios (F04), using double RAM pieces, using only one RAM at a time, loaning one working RAM (2666mhz) from a friend. 

I have also purchased a brand new SanDisk USB 2.0, removed all storage (NVMe, 3x SATA HDDs).

 

Please advise on how can I resolve it, this is Day 3 of troubleshooting.

 

Storage (not that it matters at this point of time):

Cache Pool: 1 x 2TB Samsung 980 Pro

Array: 20TB HGST (Parity) / 12TB HGST + 8TB HGST

 

Thank you.

 

Hi,

 

I am interessted in that board, too.

 

Could you maybe post the IOMMU groups, please?

 

Thanks