Intel® Xeon™ D-1581

The Intel Xeon D-1581 is a server processor with 16 cores and 32 threads. It launched in 2016. Clocks run from 1.8 GHz base to 2.4 GHz boost. A 24-MB L3 cache backs the cores (1.8 MB per core). It supports DDR3L, DDR4 memory. It uses the FCBGA1667 socket. Rated TDP is 65 W.

The Intel Xeon D-1581 scores 1,488 in single-core performance and 13,173 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 4,427 for overall performance, 10,646 for productivity performance, 9,924 for creator performance, 15,149 for engineering performance and 7,757 for gaming performance. Its multi-core throughput works out to 823 per core, 412 per thread and 203 per watt. Its computed efficiency index is 549. Its performance index is 55, so its overall performance is 45% 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 D-1581 scores 64,938 in integer math, 42,323 in floating-point math, 279,835 in compression, 3,773 in cryptography, 504 in physics simulation, 15,085 in vector SIMD, 36 in the prime sieve and 30,613 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 10% above in integer math, 8% below in floating-point math, 23% above in compression, 67% below in cryptography, 54% below in physics simulation, 3% below in vector SIMD, 46% below in the prime sieve and 35% above 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 D-1581 has 16 physical cores and runs 32 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 1.80 GHz and boosts up to 2.40 GHz.

The Intel Xeon D-1581 is a server processor and belongs to the Intel Xeon D family. It launched in 2016.

The Intel Xeon D-1581 has 1 MB of L1 cache, 4 MB of L2 cache and 24 MB of L3 cache. That adds up to about 29.0 MB of cache, or 1.81 MB per core. Each core has 256 KB of private L2 cache.

The Intel Xeon D-1581 has a 3-level cache hierarchy: L1 at 1 MB, L2 at 4 MB and L3 at 24 MB. L3 is the largest level and makes up about 83% of the cache listed here.

The Intel Xeon D-1581 supports DDR3L, DDR4 memory and runs memory at up to 2,133 MT/s. It does not support DDR5 and LPDDR memory.

The Intel Xeon D-1581 uses the FCBGA1667 socket.

The Intel Xeon D-1581 has a rated TDP of 65 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 47% of the specifications it tracks for the Intel Xeon D-1581. 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: 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 FCBGA1667 socket as the Intel Xeon D-1581 and have the closest multi-core scores in the Feex database include Intel Xeon D-1587, Intel Xeon D-1577, Intel Xeon D-1540, Intel Xeon D-1541 and Intel Xeon D-1557.