AMD Ryzen 5 8640U
Expert rating7.8 / 10
- Brand:
- AMD
- Form Factor:
- Laptop
- CPU Socket:
- BGA (soldered
- Core/Thread Count:
- 6C/12T
- TDP:
- 15W
- iGPU:
- AMD Radeon 740M/760M/780M Graphics (RDNA 3)
- CPU Series:
- Ryzen
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Manufacturer: AMD Last updated: 2026-09-12
AMD Ryzen 5 8640U Review
AMD Ryzen 5 8640U 6-core 12-thread mobile processor, 1.7GHz base / 4.9GHz boost, 15W TDP, Zen 4 (Phoenix/Hawk Point)
The AMD Ryzen 5 8640U is a power-efficient ultraportable chip built for thin-and-light laptops with long battery life. Built on AMD's Zen 4 (Phoenix/Hawk Point), it pairs 6 cores and 12 threads with a 1.7GHz base clock boosting to 4.9GHz and 16MB of L3 cache, all within a 15W power envelope.
Performance and Architecture
With 6 cores and 12 threads, the AMD Ryzen 5 8640U is built on AMD's Zen 4 (Phoenix/Hawk Point). Its 1.7GHz base clock boosts up to 4.9GHz, backed by 16MB of L3 cache for solid multitasking and application performance in a laptop chassis.
Graphics and Efficiency
The AMD Ryzen 5 8640U operates within a 15W power envelope, positioned as a power-efficient ultraportable chip built for thin-and-light laptops with long battery life. Integrated graphics come from AMD Radeon 740M/760M/780M Graphics (RDNA 3), handling everyday graphics tasks and light gaming without a discrete GPU.
Comparison to Alternatives
Within AMD's Ryzen mobile lineup in this catalog, the AMD Ryzen 5 8640U sits among other Zen 4 (Phoenix/Hawk Point) parts at the 6-core tier, differentiated by suffix and TDP class. Against Intel's Core Mobile processors in this catalog, the AMD Ryzen 5 8640U offers competitive multi-threaded performance and efficiency, while against AMD's own Ryzen AI Mobile chips in this catalog it trades a dedicated NPU/AI acceleration block for a simpler, often lower-cost platform.
Specifications
Identity
| Release Year | 2023 |
|---|
Segment and platform
| Microarchitecture | Zen 4 (Phoenix/Hawk Point) |
|---|---|
| Socket | BGA (soldered, mobile) |
Core configuration
| Total Cores | 6 |
|---|---|
| Total Threads | 12 |
Clock speeds
| P-Core Base Clock | 1.7 GHz |
|---|---|
| P-Core Boost Clock | 4.9 GHz |
Cache
| L3 Cache | 16 MB |
|---|
| Form Factor | Laptop |
|---|---|
| TDP | 15 W |
| iGPU | AMD Radeon 740M/760M/780M Graphics (RDNA 3) |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating7.8 / 10
The AMD Ryzen 5 8640U is a well-balanced ultraportable chip that prioritizes battery life and everyday responsiveness.
Best for
- Ultraportable laptops
- Business travel
- Everyday productivity
Not for
- Gaming laptops
- Heavy content creation
- Sustained multi-threaded workloads
FAQs
What are the key specifications of the AMD Ryzen 5 8640U?
The AMD Ryzen 5 8640U is a processor from AMD. Key specs: Cores 6, Threads 12, Base Clock 1.7 GHz, Boost Clock 4.9 GHz, L3 Cache 16.
Will the AMD Ryzen 5 8640U work with my current setup?
The AMD Ryzen 5 8640U lists Socket is BGA (soldered, mobile). Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the AMD Ryzen 5 8640U best suited to?
It suits ultraportable laptops, business travel, everyday productivity.
What are the drawbacks of the AMD Ryzen 5 8640U?
It is a poor fit for gaming laptops, heavy content creation, sustained multi-threaded workloads.