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Need help with SLOW 100G Speeds

#1
I just sent a msg on youtube. I've got a QNAP TS-h1290FX NAS. It's the all SSD NVME flash NAS that is 25gb and upgradeable to 100G via a NIC. So I purchased three of the QNAP CXG-100G2SF-CX6 NICs that are PCIe Gen 4 and have them in 16x slots and I cannot break about 50 GB/s on iPerf and reverse direction testing is only 9 GB/s. Blackmagic Disk Speed tests top out at 3600 MB/s write and only 1200 MB/s read. So these speeds are only 10-30% of the speeds I should be seeing. I've been talking with QNAP tech support for 3 weeks and they are no help. I've tried Windows Server even and got the same results. Tried different drivers etc etc etc and Im out of ideas and need some help. Do you do consulting or troubleshooting with things like this?
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#2
There can be different issue.
Check what NVMe SSDs you are using. Their individual performance Tested.
Then you can check motherboard PCIe lane allocation.
Then RAID type.
Then Jumbo frame configuration.
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