Lenovo ThinkSystem SR650 V3 Server Product Guide > Lenovo Press

Unlike a more obvious and drastic upgrade where you can see the difference in the connector itself, PCIe 3 and 4 drives look identical from

2 SATA SSDs _2 is allocated four PCIe lanes from the B360 chipset Both of the x1 PCIe expansion slots are each allocated one PCIe

pcie x32 slot Dedicated OCP SFF slot with PCIe x16 host interface Supports a variety of 2-port and 4-port adapters with 1, 10, 25 or 100 GbE network connectivity

pcie 4 in pcie 3 slot 2 x16 Gen 4 Card uses PCIe , which doubles the bandwidth per lane compared to PCIe With four slots, it offers up to 256 Gbps of bandwidth per card,