Whenever getting too excited re: BIOS modifications for NVME-boot-support, resizable bar, even PCIe-lane splitting for these older workstations and servers,
I´m grounded by reports like yours. No Intel-Arc GPU for me then.
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The Asmedia ASM2824 pci-switch doesn´t support NVME-booting.
It´s bandwidth is limited to eight pci-lanes: so limited to max. double (sequential RAID-) speed if on the hunt for records even with the 4-drive cards with this chip.
But useful for a dual-boot system c/w CLOVER-bootloader. A waste on your board with it´s bifurcation support.
This article gives some inside about Marvell´s 88NR2241 chip as used inside WD AN1500:
www.anandtech.com
HighPoint´s BRD/SSD6202 dual NVME-cards use this chip, too. You can find the tools to mess with the cheaper AN1500 on their site.
The Marvell-chip based cards really are plug-and-play on our boards.
I just thought you may like
RGB-lighting to not leave four pci-lanes of your MB´s PCIe 3x8 slot unused...
Then there are the pricier AICs based on Broadwell PLX chips. These need to be configured within UEFI environment.
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The advert for he Fujitsu MB says "A13":
"Fujitsu D3358-A13 GS2 Mainboard NEU Sockel LGA2011 -3 für Celsius R940 S26361-D3358-A101"
Anyways, I was only looking for what interesting machine you have there.
Regards, Siggi