Intel® Xeon™ E5-2665

The Intel Xeon E5-2665 is a server processor with 8 cores and 16 threads, built on the Sandy Bridge architecture. It launched in Jan 2012. Clocks run from 2.4 GHz base to 3.1 GHz boost. A 20-MB L3 cache backs the cores (2.8 MB per core). It addresses DDR3 memory up to 384 GB across 4 channels. The chip drops into the FCLGA2011 socket and exposes PCIe 3.0 (40 lanes). Rated TDP is 115 W. Notable platform capabilities: Extended Page Tables (EPT).

The Intel Xeon E5-2665 scores 1,385 in single-core performance and 8,287 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 3,388 for overall performance, 7,326 for productivity performance, 7,051 for creator performance, 8,494 for engineering performance and 6,227 for gaming performance. Its multi-core throughput works out to 1,036 per core, 518 per thread and 72 per watt. Its computed efficiency index is 316. Its performance index is 42, so its overall performance is 58% 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.

Scores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.

In the individual workload tests the Intel Xeon E5-2665 scores 33,018 in integer math, 12,290 in floating-point math, 143,130 in compression, 2,574 in cryptography, 687 in physics simulation, 6,411 in vector SIMD, 45 in the prime sieve and 20,974 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 44% below in integer math, 73% below in floating-point math, 37% below in compression, 78% below in cryptography, 37% below in physics simulation, 59% below in vector SIMD, 33% below in the prime sieve and 7% below in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.

The Intel Xeon E5-2665 has 8 physical cores and runs 16 logical threads. It runs 2 threads per core. It runs at a base clock of 2.40 GHz and boosts up to 3.10 GHz.

The Intel Xeon E5-2665 is a server processor, belongs to the Intel Xeon E5 family, uses the Sandy Bridge architecture, carries the codename Sandy Bridge EP and is manufactured on a 32 nm process. It launched in Jan 2012.

The Intel Xeon E5-2665 has 512 KB of L1 cache, 2 MB of L2 cache and 20 MB of L3 cache. That adds up to about 22.5 MB of cache, or 2.81 MB per core. Each core has 256 KB of private L2 cache.

The Intel Xeon E5-2665 has a 3-level cache hierarchy: L1 at 512 KB, L2 at 2 MB and L3 at 20 MB. L3 is the largest level and makes up about 89% of the cache listed here.

The Intel Xeon E5-2665 supports DDR3 memory, addresses up to 384 GB of memory, uses 4 memory channels, runs memory at up to 1,600 MT/s and delivers up to 51.2 GB/s of memory bandwidth. It does not support DDR5, DDR4 and LPDDR memory.

The Intel Xeon E5-2665 uses the FCLGA2011 socket, supports PCI Express 3.0 and provides up to 40 PCIe lanes.

The Intel Xeon E5-2665 has a rated TDP of 115 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.

The Intel Xeon E5-2665 is also identified by the model number E5-2665.

Feex has recorded 56% of the specifications it tracks for the Intel Xeon E5-2665. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Performance Cores, Efficiency Cores, Hybrid Architecture, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L4 Cache. Memory Support: ECC Memory. Graphics: Integrated Graphics, Graphics Model, Graphics Base Clock, Graphics Max Clock, Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package and Package Size. 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: Normalized Name, SKU, Processor Number and Part Number.

Processors that use the same FCLGA2011 socket as the Intel Xeon E5-2665 and have the closest multi-core scores in the Feex database include Intel Xeon E5-1660, Intel Core i7-3930K, Intel Core i7-3960X Extreme Edition, Intel Xeon E5-1650 and Intel Xeon E5-4650L.