Intel BX80563L5320A Xeon L5320 1.86GHz 8MB Processor

The Intel Xeon L5320 is a quad-core server processor built on the LGA771 socket, operating at 1.86GHz with a 1066MHz front side bus and 8MB of L2 cache split across two dual-core Woodcrest dies. The "L" series designation is the operative detail here: Intel binned these chips for a 50W TDP target, compared to 80W for the standard-voltage E5320 running at the same clock. That 30W difference is significant in high-density rack environments where power budgets per unit are enforced by the facility, not just by preference. The 8MB cache — 4MB shared per die pair — provides enough staging area for typical server workloads without requiring constant round-trips to the relatively slow DDR2 FB-DIMM memory bus.

This processor is purpose-built for dual-socket legacy server deployments: 1U/2U rack systems from the 2007–2009 era where a second CPU socket sits empty and the upgrade path demands both power efficiency and quad-core parallelism. It fits cleanly into HP ProLiant G5 and Dell PowerEdge 1950/2950 platforms still running as secondary infrastructure, NAS appliances, or low-traffic virtualization hosts. For anyone standing up a Proxmox or ESXi node on a decommissioned enterprise server, the L5320 gives four threads at a power envelope that won't trip a shared PDU. It is not a competitive choice for new builds, but within its platform constraints it remains a sensible, well-understood component.