AMD® Ryzen™ 5 8540U

The AMD Ryzen 5 8540U is a desktop processor with 6 cores and 12 threads, built on the 2x Zen 4 , 4x Zen 4c architecture (4 nm process). It launched in Dec 2023. Clocks run from 3.2 GHz base to 4.9 GHz boost. A 16-MB L3 cache backs the cores (3.7 MB per core). It addresses DDR5 memory up to 256 GB across 2 channels. The chip drops into the FP7/FP7r2 socket and exposes PCIe 4.0 (14 lanes). Rated TDP is 28 W.

The AMD Ryzen 5 8540U scores 3,621 in single-core performance and 18,343 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 8,150 for overall performance, 16,992 for productivity performance, 16,606 for creator performance, 18,228 for engineering performance and 15,449 for gaming performance. Its multi-core throughput works out to 3,057 per core, 1,529 per thread and 655 per watt. Its computed efficiency index is 1,540. Its performance index is 101, so its overall performance is 1% above 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 AMD Ryzen 5 8540U scores 57,247 in integer math, 34,953 in floating-point math, 208,044 in compression, 12,233 in cryptography, 998 in physics simulation, 15,048 in vector SIMD, 68 in the prime sieve and 24,760 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 3% below in integer math, 24% below in floating-point math, 9% below in compression, 6% above in cryptography, 8% below in physics simulation, 3% below in vector SIMD, 1% above in the prime sieve and 9% above 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 AMD Ryzen 5 8540U has 6 physical cores and runs 12 logical threads. It runs 2 threads per core. It runs at a base clock of 3.20 GHz and boosts up to 4.90 GHz.

The AMD Ryzen 5 8540U is a desktop processor, belongs to the AMD Ryzen 5 family, uses the 2x Zen 4 , 4x Zen 4c architecture, carries the codename Zen 4 (Hawk Point) and is manufactured on a 4 nm process. It launched in Dec 2023.

The AMD Ryzen 5 8540U has 6 MB of L2 cache and 16 MB of L3 cache. That adds up to about 22.0 MB of cache, or 3.67 MB per core. Feex has no recorded L1 cache size for this processor.

The AMD Ryzen 5 8540U has a 2-level cache hierarchy: L2 at 6 MB and L3 at 16 MB. L3 is the largest level and makes up about 73% of the cache listed here.

The AMD Ryzen 5 8540U supports DDR5 memory, addresses up to 256 GB of memory, uses 2 memory channels and runs memory at up to 7,500 MT/s. It does not support DDR4 and LPDDR memory.

The AMD Ryzen 5 8540U includes integrated graphics.

The AMD Ryzen 5 8540U uses the FP7/FP7r2 socket, supports PCI Express 4.0 and provides up to 14 PCIe lanes.

The AMD Ryzen 5 8540U 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 AMD Ryzen 5 8540U is manufactured by TSMC.

The AMD Ryzen 5 8540U is also identified by the model number 8540U.

After an audit, 2 values were corrected on the AMD Ryzen 5 8540U record. Each change is listed with its old value, new value, rule and sources.

• Physical cores: 4 → 6. Rule: Vendor specification applied. vendor-of-record contradicts stored value. Sources: Vendor page (amd.com); PassMark: AMD Ryzen 5 8540U; Wikipedia: List of AMD Ryzen processors (revision 1376710910); Wikipedia: List of AMD mobile processors (revision 1375446501).
• Logical threads: 8 → 12. Rule: Vendor specification applied. vendor-of-record contradicts stored value. Sources: Vendor page (amd.com); PassMark: AMD Ryzen 5 8540U; Wikipedia: List of AMD Ryzen processors (revision 1376710910); Wikipedia: List of AMD mobile processors (revision 1375446501).

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

Feex has recorded 56% of the specifications it tracks for the AMD Ryzen 5 8540U. 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: L1 Cache (Total), L2 Cache (per Core) and L4 Cache. Memory Support: Memory Bandwidth and ECC Memory. Graphics: Graphics Base Clock, Graphics Max Clock, 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 and Launch Price. Naming & Aliases: SKU, Processor Number and Part Number.

Processors close to the AMD Ryzen 5 8540U in the Feex database, matched by socket, family, segment, architecture, core count, TDP and benchmark scores, include AMD Ryzen 3 8440U, AMD Ryzen 5 8640HS, AMD Ryzen 5 8640U, AMD Ryzen 5 PRO 5655GE and AMD Ryzen 5 8500GE.