HPE ProLiant DL3X5 Gen11 2U Performance Heat Sink Kit

The HPE P58459-B21 is a performance heat sink kit engineered for the ProLiant DL3X5 Gen11 server line, such as the HPE ProLiant DL345 Gen11. It fits systems that occupy a 2U rack space and gives the processor the thermal headroom it needs to perform without throttling. Because it is an original HPE component, the kit aligns perfectly with the server’s mounting points and airflow design, so there is no guesswork about compatibility or warranty coverage.

With a footprint of roughly 25 by 29 centimeters and a height of 13.5 centimeters, the heat sink offers a substantial surface area for heat dissipation while still leaving clear access to memory slots and expansion bays. The weight, a little over one kilogram, provides the mass needed to absorb bursts of heat generated by workloads that push the CPU to its limits, including virtualization, database processing, or data analytics.

Installing the kit is straightforward. A single unit handles the cooling requirements for most configurations, so you can finish the upgrade quickly and return the server to production. Whether you manage a high-density data center or run a smaller rack in a remote office, this heat sink helps keep the system stable, which reduces the risk of thermal shutdowns and preserves uptime.

• Genuine HPE heat sink for ProLiant DL3X5 Gen11 servers, including DL345 Gen11
• Optimized for 2U rack environments
• Helps maintain safe operating temperatures during demanding workloads
• Dimensions: 25.24 cm x 28.73 cm x 13.5 cm
• Weight: 1.04 kg
• One kit typically cools an entire server configuration
• Installs without blocking memory slots or PCIe expansion areas