Reference Guide

7 NVMe and I/O Topologies for Dell EMC PowerEdge Servers
Populated with ten NVMe drives
Figure 3: PowerEdge R640 CPU mapping with ten NVMe drives
1U Server; Maximize NVMe Capacity
This 1U PowerEdge R640 configuration enables all ten storage slots to NVMe drives.
The first eight NVMe drives connect directly to CPU2, while the last two NVMe drives
use a PCIe extender card to connect to PCIe slot 1, CPU1. This configuration supports
the maximum NVMe capacity, with two extra NVMe drives, but limits I/O availability as
one I/O slot is occupied to enable the last two NVMe drives.