Intel® Xeon™ E3-1275 v5

The Intel Xeon E3-1275 v5 is a server processor with 4 cores and 8 threads, built on the Skylake architecture. It launched in Oct 2015. Clocks run from 3.6 GHz base to 4.0 GHz boost. A 8-MB L3 cache backs the cores (2.3 MB per core). It addresses DDR4 memory up to 64 GB across 2 channels. The chip drops into the FCLGA1151 socket and exposes PCIe 3.0 (16 lanes). Rated TDP is 80 W. Notable platform capabilities: Extended Page Tables (EPT).

The Intel Xeon E3-1275 v5 scores 2,299 in single-core performance and 8,317 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 4,373 for overall performance, 8,625 for productivity performance, 8,713 for creator performance, 8,005 for engineering performance and 8,976 for gaming performance. Its multi-core throughput works out to 2,079 per core, 1,040 per thread and 104 per watt. Its computed efficiency index is 489. Its performance index is 54, so its overall performance is 46% 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 E3-1275 v5 scores 26,214 in integer math, 16,148 in floating-point math, 113,613 in compression, 3,034 in cryptography, 595 in physics simulation, 7,213 in vector SIMD, 28 in the prime sieve and 14,748 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 55% below in integer math, 65% below in floating-point math, 50% below in compression, 74% below in cryptography, 45% below in physics simulation, 53% below in vector SIMD, 58% below in the prime sieve and 35% 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 E3-1275 v5 has 4 physical cores and runs 8 logical threads. It runs 2 threads per core. It runs at a base clock of 3.60 GHz and boosts up to 4.00 GHz.

The Intel Xeon E3-1275 v5 is a server processor, belongs to the Intel Xeon E3 family, uses the Skylake architecture, carries the codename Skylake and is manufactured on a 14 nm process. It launched in Oct 2015.

The Intel Xeon E3-1275 v5 has 256 KB of L1 cache, 1 MB of L2 cache and 8 MB of L3 cache. That adds up to about 9.3 MB of cache, or 2.31 MB per core. Each core has 256 KB of private L2 cache.

The Intel Xeon E3-1275 v5 has a 3-level cache hierarchy: L1 at 256 KB, L2 at 1 MB and L3 at 8 MB. L3 is the largest level and makes up about 86% of the cache listed here.

The Intel Xeon E3-1275 v5 supports DDR4 memory, addresses up to 64 GB of memory and uses 2 memory channels. It does not support DDR5 and LPDDR memory.

The Intel Xeon E3-1275 v5 includes integrated graphics (Intel HD Graphics P530) and clocks the graphics up to 1.15 GHz.

The Intel Xeon E3-1275 v5 uses the FCLGA1151 socket, supports PCI Express 3.0 and provides up to 16 PCIe lanes.

The Intel Xeon E3-1275 v5 has a rated TDP of 80 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 E3-1275 v5 is also identified by the model number E3-1275V5.

Feex has recorded 59% of the specifications it tracks for the Intel Xeon E3-1275 v5. 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: Memory Bandwidth, ECC Memory and Max Memory Speed. Graphics: 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 FCLGA1151 socket as the Intel Xeon E3-1275 v5 and have the closest multi-core scores in the Feex database include Intel Xeon E3-1270 v5, Intel Xeon E3-1240 v5, Intel Xeon E3-1260L v5, Intel Xeon E3-1280 v5 and Intel Core i5-9400T.