NVME Passthrough performance

Hi, I am trialing proxmox on a server with an AMD EPYC 7313P, 256GB RAM and a bunch of enterprise SSDs. proxmox is version 8.3. I have an ubuntu 24.04 server vm setup with 16 cores and 128GB ram on a zfs mirror and was looking at passing through specific NVME disks to the vm.

I followed the pcie passthrough guide on the proxmox manual, all disks have their own IOMMU group and it seems to be passing through the devices. i have set up md raid 6 as a test however the performance i am getting...

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