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Intel Core i5-5257U

Intel 5257U

The Intel Core i5-5257U is a fast dual-core processor based on the Broadwell architecture, which has been launched in January 2015. With a TDP of 28 W, the CPU is suited for medium-sized ultrabooks and notebooks (MacBook Pro 13), whereas smaller devices will use more power efficient ULV models such as the Core i5-5200U (15 W TDP). In addition to two CPU cores with Hyper-Threading clocked at 2.7 - 3.1 GHz (2 Cores: 3.1 GHz as well), the chip also integrates an Iris Graphics 6100 GPU and a dual-channel LPDDR3-1866/DDR3L-1600 memory controller. The Core i5 is manufactured in a 14 nm process with FinFET transistors.


Broadwell represents the "Tick" in Intel's Tick-Tock model, which means a shrink of its predecessor Haswell. The new 14 nm manufacturing process with three-dimensional FinFET transistors allows not only improvements in energy efficiency, but also a significantly smaller die size fit for more compact packages and devices.

Further advantages result from the revised microarchitecture of Broadwell. Due to its improved branch prediction, bigger buffer sizes (1500 instead of 1000 entries in the L2 TLB) and other tweaks, the performance per clock has been increased by more than 5 percent over its predecessor. There are also some new instruction set extensions designed for cryptographic applications.


Thanks to its improved architecture, the Core i5-5257U almost matches the slightly higher clocked predecessors Core i7-4558U and Core i5-4308U (Haswell, 28 W). Thus, the CPU has sufficient power even for demanding applications and multitasking.


The integrated Iris Graphics 6100 offers 48 Execution Units (EUs) clocked at 300 - 1050 MHz. Similar to the CPU core, the GPU architecture (Intel Gen 8) has been thoroughly revised for improved performance-per-clock. In addition, the GPU benefits from faster memory speeds up to LPDDR3-1866 (Haswell: DDR3-1600). Overall, the Iris Graphics 6100 is about 20 - 25 percent faster than the former Iris Graphics 5100. Nevertheless, demanding games as of 2015 will be playable only in low or medium settings.

Broadwell is the first Intel chip to fully support DirectX 11.2 as well as OpenCL 1.3/2.0 and OpenGL 4.3. Video will output natively via DisplayPort 1.2 or HDMI 1.4a. However, the new HDMI 2.0 standard is not officially supported.

Power Consumption

The i5-5257U is rated at a TDP of 28 W including the graphics card, memory controller, VRMs and the integrated chipset. Therefore, the CPU is suited for medium-sized ultrabooks 13-inches or greater.

SeriesIntel Core i5

Series: Core i5 Broadwell

Intel Core i5-5350H compare3 - 3.5 GHz2 / 4 cores4 MB L3
Intel Core i5-5287U compare2.9 - 3.3 GHz2 / 4 cores3 MB L3
Intel Core i5-5257U « 2.7 - 3.1 GHz2 / 4 cores3 MB L3
Intel Core i5-5300U compare2.3 - 2.9 GHz2 / 4 cores3 MB L3
Intel Core i5-5350U compare1.8 - 2.9 GHz2 / 4 cores3 MB L3
Intel Core i5-5200U compare2.2 - 2.7 GHz2 / 4 cores3 MB L3
Intel Core i5-5250U compare1.6 - 2.7 GHz2 / 4 cores3 MB L3
Clock Rate2700 - 3100 MHz
Level 1 Cache128 KB
Level 2 Cache512 KB
Level 3 Cache3 MB
Number of Cores / Threads2 / 4
Power Consumption (TDP = Thermal Design Power)28 Watt
Transistor Count1900 Million
Manufacturing Technology14 nm
Die Size133 mm2
Max. Temperature105 °C
FeaturesLPDDR3-1866/DDR3L-1600 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI
GPUIntel Iris Graphics 6100 (300 - 1050 MHz)
64 Bit64 Bit support
Starting Price$315 U.S.
Announcement Date01/06/2015
Product Link (external)


Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 3.21     avg: 3.4     median: 3.4 (4%)     max: 3.53 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 4684     avg: 4800     median: 4825 (29%)     max: 4890 points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 10309     avg: 10582     median: 10674 (8%)     max: 10763 points
3DMark 11 - 3DM11 Performance Physics
min: 3861     avg: 3948     median: 3898 (11%)     max: 4084 Points
3DMark - 3DMark Ice Storm Physics
min: 38688     avg: 40143     median: 40199 (33%)     max: 41542 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 5069     avg: 5147     median: 5164 (9%)     max: 5207 Points
Geekbench 3 - Geekbench 3 32 Bit Multi-Core
min: 6280     avg: 6401     median: 6400.5 (11%)     max: 6521 points
Geekbench 3 - Geekbench 3 32 Bit Single-Core
min: 2941     avg: 3014     median: 3013.5 (59%)     max: 3086 points
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
min: 1196     avg: 1567     median: 1567 (2%)     max: 1938 ms
Sunspider - Sunspider 1.0 Total Score *
min: 82.7     avg: 109.7     median: 88.4 (1%)     max: 158.1 ms
Octane V2 - Octane V2 Total Score
min: 20689     avg: 25070     median: 25070 (23%)     max: 29451 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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