motherboard with 8 pcie x16 slots
Dell PowerEdge R620 (Xeon E5-2643v2 6 Core, 32GB RAM)
... SSD + two PCIe SSD. Expansion Slot. PCle. 3 PCIe slots: (10-drive-bay configuration is available only with the 3 PCIe slot option). Two x16 slots with x16 ...
Precision 7920 Workstation Desktop Tower with Xeon ...
2 PCIe x16 2 Additional x16 slots with 2nd CPU 1 PCIe x8 open ended 1 x16 wired as x 4 1 x16 wired as x1 Up to 4 PCIe slots in PCIe enabled chassis for M.2 and U.2 (future) PCIe SSDs.
Dell RISER CONFIG 3 2 X8 3 X16 SLOTS Price - Dell Price List 2022
Riser Config3, 6 PCIe slots (4 x16 GRAPHICS Full height cards + 2 x16 LP), NVMe, 4 CPU ... Riser Config1, 8 PCIe slots (4 x16 GRAPHICS Full height slots + 2 x8 FH + 2 x16 LP), 4 CPU.
What are PCIe Slots and Their Uses? - Beginners Guide
PCI Express uses physical slots to interconnect the expansion cards to the motherboard. The common PCI Express slots we see on motherboards are PCIe x1, PCIe x4, PCIe x8, and PCIe x16.