Home > Servers > Rack and Tower Servers > Intel > White Papers > Accelerate I/O with NVMe drives on the new Dell EMC PowerEdge R650 server > Latency
Latency is another system metric that contributes to the larger performance story. For storage, latency indicates how quickly the system can respond to a request for an I/O operation. Longer latency can impact application responsiveness and could contribute to a negative user experience. In addition to greater disk bandwidth, the Dell EMC PowerEdge R650 server delivered lower latency at each of the three RAID levels than the Dell EMC PowerEdge R640. Figure 4 shows the latency that each server delivered while running one workload at each RAID level. For all our latency results from testing, see the science behind this report.