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Worse nvme disk performance when VMD over SATA is enabled

anubis2k9
Level 8

Worse nvme disk performance when VMD over SATA is enabled

When I enable the SATA controller to be mapped under VMD (Advanced -> System Agent (SA) Configuration -> Map SATA Controller under VMD - > Enable) I get worse performance for random reads\writes on my nvme drive (Samsung 1TB 980 PRO PCIe 4.0) despite the fact that I am making no change to my nvme drive.

In both cases, the regular VMD controller is enabled.

Below is a screenshot of my disk's performance without SATA over VMD:

CrystalDiskMark_20231231125417.jpg

Below is a screenshot of my disk's performance with SATA over VMD enabled:

CrystalDiskMark_20231231140017.jpg

I need SATA over VMD enabled so that I can do hardware RAID.

My motherboard is an Asus z690 E Gaming WIFI.

Is there a way I can configure my VMD settings so that I don't get degraded performance?

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