File trasfer speed: Dell R710 vs HPE DL20 Gen10

Hello,

I am replacing my Dell R710 to a HPE DL20 Gen10.

I am not satisfied from file transfer performance of DL20 and I am running a simple test.

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One folder of 2.6GB containing more than 8500 files. Many small files inside. Copy from the server to a windows 10 client with i219V, domain member of R710

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R710: Windows 2011 SBS bare metal, PERC H700 SAS6 300GB 15K, no virtualization enable. Single 1gbs connection on BCM5709c ~1:35 (LSO=0)

DL20:

i. Hyper-V server 2019. VMs of windows 10 and windows 2019 essentials tested. Samsung 970 pro on pcie adapter, on board BCM5720 and X550T2 LSO=0 and max buffers. Single 1gbe connection, Times form 2:20 to 3:00

ii. Windows 2016 Standard bare metal. Samsung 970 pro on pcie adapter, LSO=0, max buffers, Single 1gbe connection X550T2: ~1:50

BIOS profile of DL20 was "virtualization: max performance" in both scenarios.

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Side note: X550 seems to have an issue when hyper-v is enabled on the server. Drivers cannot install succesfully (hardware nmi error). Seems an issue with DL20 bios. Also I cannot find SR-IOV option in DL20 bios. I have to put back original hpe cpu and memmory in order to be sure that those are not the issue.

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Why R710 is faster than DL20??? It is driving me mad!!