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[ARTICLE · art-109837] src=forum.level1techs.com ↗ pub= topic=ai-infrastructure verified=true sentiment=↓ negative

Supermicro X9DR3-F stuck on System Initializing 91 after Intel Arc B70 Install

A user reports that installing an Intel Arc B70 graphics card into a Supermicro X9DR3-F server motherboard causes the system to hang at POST code 91, despite BIOS resets, UEFI settings, and a PSU swap from an 11-year-old Corsair 860W unit. The issue persists across all three PCIe 3.0 x16 slots, while other PCI cards work, leading the user to abandon the upgrade and plan to sell the card.

read1 min views3 publishedAug 25, 2026
Supermicro X9DR3-F stuck on System Initializing 91 after Intel Arc B70 Install
Image: Forum (auto-discovered)

Frustrating problem..

I purchased an Intel Arc B70 to swap my old Quadro P2000 card in an old Unraid Server. Was looking to use it for some simple always on inference vs my main AI Workstation with a 5090.

When I install the card, in any of the 3x 3.0 X16 slots, it gets stuck posting on 91.

I’ve reset the BIOS

Installed the most recent BIOS revision

Modified BIOS settings to ensure that it is set to UEFI for graphics

Modified BIOS settings to ensure it is using offboard graphics instead of onboard

Pulled the CMOS battery to test it that way

Swapped the card amongst all 3x PCI 3.0 x16 slots. My other PCI cards work fine

wtf can the issue be at this point? Could it be the PSU, it’s a Corsair 860W? Any other suggestions?

Went ahead and swapped the PSU as the old one was 11 years old at this point and also hoped the extra wattage would be what was needed. Still no post. Giving up. I guess the one good thing is that I can sell the card for more than I paid for it.

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