Intel® Core™ i7-4578U

The Intel Core i7-4578U 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 3.0 GHz base to 3.5 GHz boost. A 4-MB L3 cache backs the cores (2.3 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 i7-4578U scores 1,914 in single-core performance and 3,054 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 2,418 for overall performance, 4,665 for productivity performance, 5,125 for creator performance, 2,844 for engineering performance and 6,506 for gaming performance. Its multi-core throughput works out to 1,527 per core, 764 per thread and 109 per watt. Its computed efficiency index is 457. Its performance index is 30, so its overall performance is 70% 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 i7-4578U scores 10,558 in integer math, 5,248 in floating-point math, 50,730 in compression, 898 in cryptography, 268 in physics simulation, 2,152 in vector SIMD, 13 in the prime sieve and 5,735 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 82% below in integer math, 89% below in floating-point math, 78% below in compression, 92% below in cryptography, 75% below in physics simulation, 86% below in vector SIMD, 81% below in the prime sieve and 75% 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 i7-4578U has 2 physical cores and runs 4 logical threads. It runs 2 threads per core. It runs at a base clock of 3.00 GHz and boosts up to 3.50 GHz.

The Intel Core i7-4578U is a laptop processor, belongs to the Intel Core i7 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 i7-4578U has 128 KB of L1 cache, 512 KB of L2 cache and 4 MB of L3 cache. That adds up to about 4.6 MB of cache, or 2.31 MB per core. Each core has 256 KB of private L2 cache.

The Intel Core i7-4578U has a 3-level cache hierarchy: L1 at 128 KB, L2 at 512 KB and L3 at 4 MB. L3 is the largest level and makes up about 86% of the cache listed here.

The Intel Core i7-4578U 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 i7-4578U includes integrated graphics (Intel Iris Graphics 5100) and clocks the graphics up to 1.20 GHz.

The Intel Core i7-4578U uses the FCBGA1168 socket, supports PCI Express 2.0 and provides up to 12 PCIe lanes.

The Intel Core i7-4578U 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 i7-4578U is also identified by the model number i7-4578U.

After an audit, 1 value was corrected on the Intel Core i7-4578U 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 i7-4578U. 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 i7-4578U and have the closest multi-core scores in the Feex database include Intel Core i5-5287U, Intel Core i5-4308U, Intel Core i7-5650U, Intel Core i7-5600U and Intel Core i7-4558U.