Intel® Xeon™ E5-2666 v3

The Intel Xeon E5-2666 v3 is a server processor with 10 cores and 20 threads, built on the Haswell architecture. It launched in Nov 2014. Clocks run from 2.9 GHz base to 3.5 GHz boost. A 25-MB L3 cache backs the cores (2.5 MB per core). It supports DDR3, DDR4 memory. It uses the FCLGA2011-3 socket. Rated TDP is 135 W.

The Intel Xeon E5-2666 v3 scores 1,956 in single-core performance and 14,017 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 5,236 for overall performance, 11,849 for productivity performance, 11,230 for creator performance, 14,805 for engineering performance and 9,372 for gaming performance. Its multi-core throughput works out to 1,402 per core, 701 per thread and 104 per watt. Its computed efficiency index is 451. Its performance index is 65, so its overall performance is 35% below the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Workload sub-scores (integer math, floating point, compression, encryption, physics, SIMD, prime sieve and sorting) are not recorded for the Intel Xeon E5-2666 v3.

The Intel Xeon E5-2666 v3 has 10 physical cores and runs 20 logical threads. It does not use a hybrid performance and efficiency core layout. It runs 2 threads per core. It runs at a base clock of 2.90 GHz and boosts up to 3.50 GHz.

The Intel Xeon E5-2666 v3 is a server processor, belongs to the Intel Xeon E5 family and uses the Haswell architecture. It launched in Nov 2014.

The Intel Xeon E5-2666 v3 has 25 MB of L3 cache. That adds up to about 25.0 MB of cache, or 2.50 MB per core. Feex has no recorded L1 cache size for this processor.

The Intel Xeon E5-2666 v3 supports DDR3, DDR4 memory and runs memory at up to 2,133 MT/s. It does not support DDR5 and LPDDR memory.

The Intel Xeon E5-2666 v3 uses the FCLGA2011-3 socket.

The Intel Xeon E5-2666 v3 has a rated TDP of 135 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

Feex has recorded 45% of the specifications it tracks for the Intel Xeon E5-2666 v3. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: Codename, ISA Family and Market Status. Cache: L1 Cache (Total), L2 Cache (Total), L2 Cache (per Core) and L4 Cache. Memory Support: Memory Channels, Memory Bandwidth and ECC Memory. Graphics: Integrated Graphics, Graphics Model, Graphics Base Clock, Graphics Max Clock, Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package, Package Size and PCIe Lanes. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count, Foundry and Launch Price. Naming & Aliases: SKU, Model Number, Processor Number and Part Number.

Processors that use the same FCLGA2011-3 socket as the Intel Xeon E5-2666 v3 and have the closest multi-core scores in the Feex database include Intel Xeon E5-2673 v3, Intel Xeon E5-2678 v3, Intel Xeon E5-1681 v3, Intel Xeon E5-2675 v3 and Intel Xeon E5-2676 v3.