Intel XEON E5620 2.40GHz Quad Core CPU - Server Performance

Our review of the Intel XEON E5620 2.40GHz finds it best suited to builders and small server operators who need reliable multi-threaded performance on a budget. The bottom line: this is a practical, mature Xeon with four cores, a substantial 12 MB shared cache and a conservative 80W TDP that together deliver steady throughput for virtualization, file serving or compute tasks on LGA 1366 platforms. It appeals where stability and legacy platform compatibility matter more than the absolute latest single-thread speed.

Key Features

• Xeon processor type: Delivers workstation and server grade reliability for sustained multi-threaded workloads without consumer CPU compromises.
• Four physical cores: Provides solid parallel processing for virtual machines, background services, and multi-threaded applications.
• 12 MB L3 cache: Large shared cache helps reduce memory latency for database and I/O heavy tasks, improving throughput under load.
• LGA 1366 socket compatibility: Fits older Socket B motherboards so it extends the usable life of established server hardware affordably.
• 80W thermal design: Moderate power draw that simplifies cooling requirements in rack or tower systems while maintaining consistent performance.
• 2933 MHz bus speed: Supports the platform interconnect bandwidth expected of this generation, aiding memory and chipset communication.

Who It's For

The XEON E5620 is aimed at IT hobbyists, small business server admins and anyone maintaining or refurbishing LGA 1366 systems who needs dependable multi-core processing without replacing the whole platform. It makes sense for light virtualization, home lab clusters, and file or print servers where cost per core and compatibility matter.

Users who need the fastest single-threaded gaming performance, cutting-edge instruction sets, or the highest core counts should look elsewhere to modern desktop or server CPUs. Likewise, those unable to source a compatible LGA 1366 motherboard should plan for a platform upgrade instead of this CPU.

Pros & Cons

Pros

• Good multi-thread value from four physical cores and a large 12 MB L3 cache for sustained server tasks.
• Moderate 80W TDP keeps cooling simpler and energy use predictable in continuous operation.
• Fits LGA 1366/Socket B systems, allowing economical platform refreshes without replacing the motherboard.

Cons

• Not competitive with modern CPUs for single-threaded or high core-count workloads due to older architecture and lower clock speed.
• Limited by platform age: DDR3 memory and older chipsets restrict upgrade paths and features.

Specifications

Processor Type	Xeon
Model / MPN	SLBV4
Number of Cores	4
Clock Speed	2.40 GHz
L2 Cache	1.0 MB
L3 Cache	12 MB
Socket Type	LGA 1366 / Socket B
Bus Speed	2933 MHz

Our Verdict

The Intel XEON E5620 2.40GHz is a sensible buy for refurbishing older servers or building a budget-conscious home lab where proven stability and multi-core throughput matter more than cutting-edge speed. Its combination of four cores, 12 MB L3 cache and 80W TDP represent good value on compatible LGA 1366 platforms, though buyers should accept the tradeoffs of older memory and chipset features.

Frequently Asked Questions

Will this CPU fit my board?
It requires an LGA 1366 / Socket B motherboard; verify socket support before purchasing.

Is this good for virtualization?
Yes for light to moderate virtualization tasks; the four cores and 12 MB cache handle several VMs but are not a substitute for modern many-core server CPUs.

What about power and cooling?
The CPU has an 80W TDP, so typical tower or rack cooling solutions used in older servers are sufficient for continuous operation.