Intel® Core™ i5-4278U

The Intel Core i5-4278U is a laptop processor with 2 cores and 4 threads, built on the Haswell architecture (22 nm process). It launched in Jul 2014. Clocks run from 2.6 GHz base to 3.1 GHz boost. A 3-MB L3 cache backs the cores (2.1 MB per core). It addresses LPDDR3 memory up to 16 GB across 2 channels. The chip drops into the FCBGA1168 socket and exposes PCIe 2.0 (12 lanes). Rated TDP is 28 W. Notable platform capabilities: Extended Page Tables (EPT).

The Intel Core i5-4278U scores 1,703 in single-core performance and 2,827 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 2,194 for overall performance, 4,222 for productivity performance, 4,620 for creator performance, 2,633 for engineering performance and 5,816 for gaming performance. Its multi-core throughput works out to 1,414 per core, 707 per thread and 101 per watt. Its computed efficiency index is 415. Its performance index is 27, so its overall performance is 73% 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 i5-4278U scores 9,735 in integer math, 4,780 in floating-point math, 46,759 in compression, 823 in cryptography, 256 in physics simulation, 2,042 in vector SIMD, 12 in the prime sieve and 5,368 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 83% below in integer math, 90% below in floating-point math, 79% below in compression, 93% below in cryptography, 77% below in physics simulation, 87% below in vector SIMD, 82% below in the prime sieve and 76% 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 i5-4278U has 2 physical cores and runs 4 logical threads. It runs 2 threads per core. It runs at a base clock of 2.60 GHz and boosts up to 3.10 GHz.

The Intel Core i5-4278U is a laptop processor, belongs to the Intel Core i5 family, uses the Haswell architecture, carries the codename Haswell and is manufactured on a 22 nm process. It launched in Jul 2014.

The Intel Core i5-4278U has 256 KB of L1 cache, 1 MB of L2 cache and 3 MB of L3 cache. That adds up to about 4.3 MB of cache, or 2.13 MB per core. Each core has 256 KB of private L2 cache.

The Intel Core i5-4278U has a 3-level cache hierarchy: L1 at 256 KB, L2 at 1 MB and L3 at 3 MB. L3 is the largest level and makes up about 71% of the cache listed here.

The Intel Core i5-4278U supports LPDDR3 memory, addresses up to 16 GB of memory and uses 2 memory channels. It does not support DDR5 and DDR4 memory.

The Intel Core i5-4278U includes integrated graphics (Intel Iris Graphics 5100) and clocks the graphics up to 1.10 GHz.

The Intel Core i5-4278U uses the FCBGA1168 socket, supports PCI Express 2.0 and provides up to 12 PCIe lanes.

The Intel Core i5-4278U has a rated TDP of 28 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 i5-4278U is also identified by the model number i5-4278U.

After an audit, 1 value was corrected on the Intel Core i5-4278U record. Each change is listed with its old value, new value, rule and sources.

• PCIe revision: 2 → 2.0. Rule: Cleanup pcie int to decimal. normalize to the dominant "N.0" format.

The audit log is public: all changes for this CPU, the corrections overview and the method.

Feex has recorded 60% of the specifications it tracks for the Intel Core i5-4278U. 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, ECC Memory and Max Memory Speed. 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 FCBGA1168 socket as the Intel Core i5-4278U and have the closest multi-core scores in the Feex database include Intel Core i5-5257U, Intel Core i7-5500U, Intel Core i7-5550U, Intel Core i7-4600U and Intel Core i5-5300U.