Dell Precision 7820 Tower Series Intel Chipset C621 Socket LGA3647 Desktop Motherboard 7JJ74 07JJ74 CN-07JJ74.
Chipset: Intel C621
Socket: Intel LGA3647 (H95385-004)
Max Supported Memory: 256GB for Sky Lake CPUs, 512GB for Cascade Lake CPUs
Number of Memory Slots: 6
Memory Type: DDR4 SDRAM
Speed: 2666MHz, 2933MHz, 3200MHz
Type: Desktop Motherboard