AMD® Ryzen™ 7 7840U

The AMD Ryzen 7 7840U is a laptop processor with 8 cores and 16 threads, built on the Zen 4 architecture (4 nm process). It launched in May 2023. Clocks run from 3.3 GHz base to 5.1 GHz boost. A 16-MB L3 cache backs the cores (3.1 MB per core). It addresses DDR5 memory up to 256 GB across 2 channels. The chip drops into the FP7 socket and exposes PCIe 4.0 (20 lanes). Rated TDP is 28 W. Notable platform capabilities: AVX-512, AMD-V (Hardware Virtualization), AMD SEV.

The AMD Ryzen 7 7840U scores 3,540 in single-core performance and 24,386 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 9,291 for overall performance, 20,807 for productivity performance, 19,784 for creator performance, 24,996 for engineering performance and 16,717 for gaming performance. Its multi-core throughput works out to 3,048 per core, 1,524 per thread and 871 per watt. Its computed efficiency index is 1,756. Its performance index is 115, so its overall performance is 15% 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 7 7840U scores 89,295 in integer math, 50,867 in floating-point math, 282,505 in compression, 17,340 in cryptography, 1,242 in physics simulation, 19,979 in vector SIMD, 79 in the prime sieve and 33,451 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 52% above in integer math, 11% above in floating-point math, 24% above in compression, 51% above in cryptography, 14% above in physics simulation, 29% above in vector SIMD, 18% above in the prime sieve and 48% 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 7 7840U has 8 physical cores and runs 16 logical threads. It runs 2 threads per core. It runs at a base clock of 3.30 GHz and boosts up to 5.10 GHz.

The AMD Ryzen 7 7840U is a laptop processor, belongs to the AMD Ryzen 7 family, uses the Zen 4 architecture, carries the codename Phoenix and is manufactured on a 4 nm process. It launched in May 2023.

The AMD Ryzen 7 7840U has 512 KB of L1 cache, 8 MB of L2 cache and 16 MB of L3 cache. That adds up to about 24.5 MB of cache, or 3.06 MB per core. Each core has 1 MB of private L2 cache.

The AMD Ryzen 7 7840U has a 3-level cache hierarchy: L1 at 512 KB, L2 at 8 MB and L3 at 16 MB. L3 is the largest level and makes up about 65% of the cache listed here.

The AMD Ryzen 7 7840U 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 7 7840U includes integrated graphics.

The AMD Ryzen 7 7840U uses the FP7 socket, supports PCI Express 4.0 and provides up to 20 PCIe lanes.

The AMD Ryzen 7 7840U 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 7 7840U is manufactured by TSMC.

The AMD Ryzen 7 7840U is also identified by the model number 7840U.

Feex has recorded 60% of the specifications it tracks for the AMD Ryzen 7 7840U. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, Hybrid Architecture, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: 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 that use the same FP7 socket as the AMD Ryzen 7 7840U and have the closest multi-core scores in the Feex database include AMD Ryzen 7 8840HS, AMD Ryzen 9 6900HX, AMD Ryzen 7 PRO 8840U, AMD Ryzen 5 PRO 8645HS and AMD Ryzen 7 8840U.