Core i5-5257U

Details and Benchmarks for Intel Core i5-5257U

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Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i5-5257U based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,908 Rank: 944
Rank Name Score Visual
940 Core i3-8145U 4,914
+0.1%
941 Core i5-4570T 4,914
+0.1%
942 Core i7-6498DU 4,913
+0.1%
943 Core m7-6Y75 4,912
+0.1%
944 Core i5-5257U 4,908
945 Core i5-6300HQ 4,907
+-0%
946 Core i3-1000NG4 4,906
+-0%
947 Core i7-3740QM 4,902
-0.1%
948 Xeon D-1567 4,901
-0.1%
949 Ryzen Embedded R1505G 4,900
-0.2%

View full ranking →

Multicore Score

Multicore performance score for Core i5-5257U based on multi-threaded benchmark results.

4,526 Rank: 1183
Rank Name Score Visual
1179 Core i5-6260U 4,529
+0.1%
1180 Intel Core i3-7100U 4,528
+0%
1181 A8-7650K 4,527
+0%
1182 Core i7-5650U 4,526
+0%
1183 Core i5-5257U 4,526
1184 Xeon E3-1225 4,526
+0%
1185 Core i5-5287U 4,525
+-0%
1186 Celeron 807UE 4,524
+-0%
1187 Atom C3558 4,524
+-0%
1188 A10-6790K 4,524
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Core i5-5257U based on single-threaded benchmark results.

5,163 Rank: 841
Rank Name Score Visual
837 Ryzen Embedded V1605B 5,165
+0%
838 Ryzen 3 PRO 3300U 5,164
+0%
839 Ryzen 5 7520U 5,164
+0%
840 Core i3-6100T 5,163
+0%
841 Core i5-5257U 5,163
842 Ryzen 5 1400 5,162
+-0%
843 Core i5-7442EQ 5,161
+-0%
844 Xeon E5-1620 v2 5,159
-0.1%
845 Core i5-1030NG7 5,159
-0.1%
846 Core i3-8121U 5,158
-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i5-5257U based on integer math, floating point math, and prime number computation benchmarks.

4,541 Rank: 1220
Rank Name Score Visual
1216 A10-5750M 4,542
+0%
1217 Celeron J4125 4,542
+0%
1218 Core i3-6100TE 4,541
+0%
1219 Core i3-7130U 4,541
+0%
1220 Core i5-5257U 4,541
1221 Pentium G3420 4,541
+0%
1222 Phenom II X4 955 4,541
+0%
1223 FX-9800P 4,541
+0%
1224 Xeon E3-1220L v2 4,541
+0%
1225 Celeron G5900 4,541
+0%

View full ranking →

Data Processing

Aggregated score for Core i5-5257U based on data encryption, data compression, and string sorting benchmarks.

4,519 Rank: 1215
Rank Name Score Visual
1211 Core i3-2125 4,520
+0%
1212 Core i5-4210M 4,520
+0%
1213 Core i3-4150T 4,520
+0%
1214 Core i5-6260U 4,519
+0%
1215 Core i5-5257U 4,519
1216 Core i5-3340M 4,519
+0%
1217 Xeon L5420 4,519
+0%
1218 Core i5-2390T 4,519
+0%
1219 Core i3-6167U 4,518
+-0%
1220 Core i3-3210 4,518
+-0%

View full ranking →

Physics & Compute

Aggregated score for Core i5-5257U based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,547 Rank: 1123
Rank Name Score Visual
1119 Core i3-5157U 4,548
+0%
1120 Core i3-6100U 4,547
+0%
1121 A10-7890K 4,547
+0%
1122 Core i7-3520M 4,547
+0%
1123 Core i5-5257U 4,547
1124 Core i5-3380M 4,547
+0%
1125 A10-7870K 4,547
+0%
1126 Core i5-5300U 4,547
+0%
1127 Core i3-3240 4,546
+-0%
1128 A12-9800 4,545
+-0%

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Core i5-5257U Details

The Intel Core i5-5257U stands as a mid-tier mobile processor from Intel's Broadwell-U generation, launched in March 2015. As of early 2026, it is well over a decade old, placing it firmly in the realm of legacy hardware. Despite its age, the processor remains notable for its balanced performance and efficient power delivery, especially within the context of its era. It competes against similarly aged mobile CPUs, such as the Core i5-5287U and A10-6790K, though it trails behind newer models in both single-core and multicore performance. Its overall score of 4908 places it at rank #944 out of 2060 in the broader CPU landscape, indicating that it is significantly outpaced by modern processors but still holds relevance for basic computing tasks.

At the heart of the Core i5-5257U is a 2-core, 4-thread design built on Intel's 14 nm Broadwell-U architecture. With a base frequency of 2.7 GHz and a turbo boost up to 3.1 GHz, the processor leverages Intel Hyper-Threading to effectively double its thread count, enhancing multitasking capabilities. The chip integrates 3 MB of L3 cache and features 0.061 MiB of L1 and 0.244 MiB of L2 cache, ensuring efficient data access for common workloads. The TDP of 28 W reflects its focus on power efficiency, making it suitable for thin-and-light laptops. It uses a dual-channel DDR3L/LPDDR3 memory interface, supporting speeds up to 1866 MT/s, with a maximum memory capacity of 16 GB.

The integrated Intel Iris 6100 graphics engine provides modest but capable performance for light gaming and multimedia tasks. Operating at a base frequency of 300 MHz and capable of reaching 1.05 GHz in burst mode, the GPU supports up to three displays and delivers a reasonable level of visual performance for its time. The processor also supports a range of modern technologies, including AVX2, AES-NI, and Intel's virtualization features like VT-x and VT-d, which enable secure and efficient virtual machine operations. The locked multiplier limits overclocking potential, a common trait in Intel's mobile processors of this era.

In benchmark testing, the Core i5-5257U scores 5163 in single-core performance, ranking #840 among 2060 CPUs, and 4526 in multicore performance, placing it at #1182. Its overall score of 4908 positions it between more powerful processors like the Core i5-6260U and the Core i5-5300U, but behind higher-tier mobile chips. While it outperforms some older and lower-end CPUs such as the Celeron 807UE and Atom C3558, it falls short of current mainstream mobile processors like the Ryzen 5 7520U and Core i3-8145U. The processor’s strongest category is single-core performance, where it holds a competitive edge over many of its peers, but its multicore capabilities are less impressive, reflecting its older architecture and limited core count.

As of February 2026, the Core i5-5257U is best suited for entry-level laptops and devices requiring basic computing power with low power consumption. It remains viable for web browsing, office applications, and light media playback, but its age and limited scalability make it unsuitable for modern gaming, content creation, or heavy multitasking. Its performance is now more comparable to mid-range desktop CPUs from the early 2010s, such as the Phenom II X4 B55, rather than current high-end mobile processors. While it was a capable performer in its time, it now serves as a reminder of how far mobile computing has advanced in the past decade.
Frequently Compared

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Intel Core i5-5257U

Main Specifications

Designer: Intel
Name: Core i5-5257U
Model Number: i5-5257U
Cores: 2
Threads: 4
Base Frequency: 2700 MHz
Clock Multiplier: 27x (locked)
Core Name: Broadwell-U
Socket: FCBGA1168
Package: FC-BGA1168
Target Segment: Mobile
Max CPUs: 1
TDP: 28 W

Cache Specifications

L1 Cache: 62.464 KiB
L2 Cache: 0.244 MiB
L3 Cache: 2.861 MiB

Memory Specifications

Supported Memory Type: DDR3L 1333/1600, LPDDR3 1600/1866
Memory Channels: 2
Maximum Memory: 0 GB
Maximum Bandwidth: 25.6 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 2.0
PCIe Lanes: 12
PCIe Configuration: 4x1, 2x4

Integrated Graphics

GPU: Iris™ Graphics 6100
GPU Designer: Intel
GPU Max Frequency: 1050 MHz

Physical Specifications

Process: 14 nm
Die Area: 133 mm²
Manufacturer: Intel
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX2 AES ADX x86-64 HT EIST TXT vPro VT-x VT-d EPT Secure Key SMEP SIPP IPT TSX Flex Memory FMA
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