Intel® Core™ i5-8257U

The Intel Core i5-8257U is a laptop processor with 4 cores and 8 threads, built on the Coffee Lake architecture (14 nm process). It launched in Jul 2019. Clocks run from 1.4 GHz base to 3.9 GHz boost. A 6-MB L3 cache backs the cores (1.8 MB per core). It addresses DDR4, LPDDR3 memory up to 32 GB across 2 channels. The chip drops into the FCBGA1528 socket and exposes PCIe 3.0 (16 lanes). Rated TDP is 15 W. Notable platform capabilities: Extended Page Tables (EPT).

The Intel Core i5-8257U scores 2,232 in single-core performance and 7,385 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 4,060 for overall performance, 7,925 for productivity performance, 8,079 for creator performance, 7,108 for engineering performance and 8,542 for gaming performance. Its multi-core throughput works out to 1,846 per core, 923 per thread and 492 per watt. Its computed efficiency index is 1,048. Its performance index is 50, so its overall performance is 50% 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 Core i5-8257U scores 24,706 in integer math, 13,770 in floating-point math, 103,047 in compression, 2,695 in cryptography, 803 in physics simulation, 4,649 in vector SIMD, 34 in the prime sieve and 11,999 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 58% below in integer math, 70% below in floating-point math, 55% below in compression, 77% below in cryptography, 26% below in physics simulation, 70% below in vector SIMD, 49% below in the prime sieve and 47% 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 Core i5-8257U has 4 physical cores and runs 8 logical threads. It runs 2 threads per core. It runs at a base clock of 1.40 GHz and boosts up to 3.90 GHz.

The Intel Core i5-8257U is a laptop processor, belongs to the Intel Core i5 family, uses the Coffee Lake architecture, carries the codename Coffee Lake and is manufactured on a 14 nm process. It launched in Jul 2019.

The Intel Core i5-8257U has 256 KB of L1 cache, 1 MB of L2 cache and 6 MB of L3 cache. That adds up to about 7.3 MB of cache, or 1.81 MB per core. Each core has 256 KB of private L2 cache.

The Intel Core i5-8257U has a 3-level cache hierarchy: L1 at 256 KB, L2 at 1 MB and L3 at 6 MB. L3 is the largest level and makes up about 83% of the cache listed here.

The Intel Core i5-8257U supports DDR4, LPDDR3 memory, addresses up to 32 GB of memory, uses 2 memory channels and runs memory at up to 2,400 MT/s. It does not support DDR5 memory.

The Intel Core i5-8257U includes integrated graphics (Intel Iris Plus Graphics 645) and clocks the graphics up to 1.05 GHz.

The Intel Core i5-8257U uses the FCBGA1528 socket, supports PCI Express 3.0 and provides up to 16 PCIe lanes.

The Intel Core i5-8257U has a rated TDP of 15 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 Core i5-8257U is also identified by the model number i5-8257U.

Feex has recorded 62% of the specifications it tracks for the Intel Core i5-8257U. 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, Foundry and Launch Price. Naming & Aliases: Normalized Name, SKU, Processor Number and Part Number.

Processors that use the same FCBGA1528 socket as the Intel Core i5-8257U and have the closest multi-core scores in the Feex database include Intel Core i5-8279U, Intel Core i7-8557U, Intel Core i5-8260U, Intel Core i5-8269U and Intel Core i5-8259U.