Ryzen 5 8645HS vs Ryzen 7 PRO 7840U
Aggregate performance score
Ryzen 7 PRO 7840U outperforms Ryzen 5 8645HS by a small 7% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 7 PRO 7840U and Ryzen 5 8645HS processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 449 | 499 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD Phoenix (Zen 4, Ryzen 7040) | no data |
| Power efficiency | 52.46 | 30.43 |
| Architecture codename | Phoenix (Zen 4) (2023) | Hawk Point-HS (Zen 4) (2023−2024) |
| Release date | 3 May 2023 (1 year ago) | 6 December 2023 (1 year ago) |
Detailed specifications
Ryzen 7 PRO 7840U and Ryzen 5 8645HS basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 8 (Octa-Core) | 6 (Hexa-Core) |
| Threads | 16 | 12 |
| Base clock speed | 3.3 GHz | 4.3 GHz |
| Boost clock speed | 5.1 GHz | 5 GHz |
| L1 cache | 512 KB | 64 KB (per core) |
| L2 cache | 8 MB | 1 MB (per core) |
| L3 cache | 16 MB | 16 MB (shared) |
| Chip lithography | 4 nm | 4 nm |
| Die size | 178 mm2 | 178 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Number of transistors | no data | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
Compatibility
Information on Ryzen 7 PRO 7840U and Ryzen 5 8645HS compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | no data | 1 |
| Socket | no data | FP8 |
| Power consumption (TDP) | 28 Watt | 45 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 7 PRO 7840U and Ryzen 5 8645HS. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3 |
| AES-NI | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 7 PRO 7840U and Ryzen 5 8645HS are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 7 PRO 7840U and Ryzen 5 8645HS. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | AMD Radeon 780M ( - 2700 MHz) | AMD Radeon 760M ( - 2600 MHz) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 7 PRO 7840U and Ryzen 5 8645HS.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 20 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Cinebench 15 64-bit multi-core
Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.
Cinebench 15 64-bit single-core
Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.
Geekbench 5.5 Multi-Core
Blender(-)
Geekbench 5.5 Single-Core
7-Zip Single
7-Zip
WebXPRT 3
CrossMark Overall
WebXPRT 4 Overall
Blender v3.3 Classroom CPU(-)
Geekbench 6.3 Multi-Core
Geekbench 6.3 Single-Core
Pros & cons summary
| Performance score | 15.52 | 14.47 |
| Integrated graphics card | 18.32 | 14.90 |
| Recency | 3 May 2023 | 6 December 2023 |
| Physical cores | 8 | 6 |
| Threads | 16 | 12 |
| Power consumption (TDP) | 28 Watt | 45 Watt |
Ryzen 7 PRO 7840U has a 7.3% higher aggregate performance score, 23% faster integrated GPU, 33.3% more physical cores and 33.3% more threads, and 60.7% lower power consumption.
Ryzen 5 8645HS, on the other hand, has an age advantage of 7 months.
Given the minimal performance differences, no clear winner can be declared between Ryzen 7 PRO 7840U and Ryzen 5 8645HS.
Should you still have questions on choice between Ryzen 7 PRO 7840U and Ryzen 5 8645HS, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
