What socket and chipset does the X13DEI-T use?

It uses the LGA 4677 socket for Intel Xeon Scalable processors and the Intel C741 chipset.

Will it fit a standard ATX case?

No. It is a proprietary Supermicro form factor and is designed for specific Supermicro chassis, so check the chassis model before buying.

No. Networking is wired only, through dual RJ45 10GBase-T ports on the Intel X710 controller.

DDR4 ECC registered DIMMs across eight slots. It does not accept DDR5.

Yes. A Broadcom RAID controller is integrated on the board, so no separate add-in card is needed for supported RAID modes.

No. It is not marketed for multi-GPU use and has no mining or multi-GPU support.

At Newegg, for $1,151.15, as of our latest check.

$1,151.15at NeweggChecked Nov 10

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