Intel® Atom™ x5-E3940

The Intel Atom x5-E3940 is a embedded processor with 4 cores and 4 threads, built on the Apollo Lake architecture. It launched in Oct 2016. Clocks run from 1.6 GHz base to 1.8 GHz boost. A 2-MB L3 cache backs the cores (1.7 MB per core). It addresses LPDDR4 memory up to 8 GB across 4 channels. The chip drops into the FCBGA1296 socket and exposes PCIe 2.0 (6 lanes). Rated TDP is 9.5 W. Notable platform capabilities: Extended Page Tables (EPT).

The Intel Atom x5-E3940 scores 672 in single-core performance and 1,858 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 1,117 for overall performance, 2,149 for productivity performance, 2,232 for creator performance, 1,788 for engineering performance and 2,481 for gaming performance. Its multi-core throughput works out to 465 per core, 465 per thread and 196 per watt. Its computed efficiency index is 363. Its performance index is 14, so its overall performance is 86% 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 Atom x5-E3940 scores 8,295 in integer math, 2,413 in floating-point math, 27,879 in compression, 1,149 in cryptography, 147 in physics simulation, 815 in vector SIMD, 5 in the prime sieve and 3,769 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 86% below in integer math, 95% below in floating-point math, 88% below in compression, 90% below in cryptography, 87% below in physics simulation, 95% below in vector SIMD, 93% below in the prime sieve and 83% 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 Atom x5-E3940 has 4 physical cores and runs 4 logical threads. It does not support simultaneous multithreading, so its thread count equals its core count. It runs at a base clock of 1.60 GHz and boosts up to 1.80 GHz.

The Intel Atom x5-E3940 is a embedded processor, belongs to the Intel Atom X family, uses the Apollo Lake architecture, carries the codename Apollo Lake and is manufactured on a 14 nm process. It launched in Oct 2016.

The Intel Atom x5-E3940 has 896 KB of L1 cache, 4 MB of L2 cache and 2 MB of L3 cache. That adds up to about 6.9 MB of cache, or 1.72 MB per core. Each core has 1 MB of private L2 cache.

The Intel Atom x5-E3940 has a 3-level cache hierarchy: L1 at 896 KB, L2 at 4 MB and L3 at 2 MB. L2 is the largest level and makes up about 58% of the cache listed here.

The Intel Atom x5-E3940 supports LPDDR4 memory, addresses up to 8 GB of memory, uses 4 memory channels and runs memory at up to 2,133 MT/s. It does not support DDR5 and DDR4 memory.

The Intel Atom x5-E3940 includes integrated graphics (Intel HD Graphics 500) and clocks the graphics up to 0.60 GHz.

The Intel Atom x5-E3940 uses the FCBGA1296 socket, supports PCI Express 2.0 and provides up to 6 PCIe lanes.

The Intel Atom x5-E3940 has a rated TDP of 10 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 Atom x5-E3940 is manufactured by Intel. It launched at a price of $34.

The Intel Atom x5-E3940 is also identified by the model number E3940.

Feex has recorded 62% of the specifications it tracks for the Intel Atom x5-E3940. 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 and ECC Memory. 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 and Foundry. Naming & Aliases: Normalized Name, SKU, Processor Number and Part Number.

Processors that use the same FCBGA1296 socket as the Intel Atom x5-E3940 and have the closest multi-core scores in the Feex database include Intel Celeron N3450, Intel Atom x7-E3950, Intel Pentium N4200, Intel Celeron J3455 and Intel Pentium J4205.