Ryzen 9 7840HX vs Ryzen 5 8400F
Primary details
Comparing Ryzen 5 8400F and Ryzen 9 7840HX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 461 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 59.85 | no data |
| Market segment | Desktop processor | Laptop |
| Series | no data | AMD Dragon Range (Zen 4, Ryzen 7045) |
| Power efficiency | 21.99 | no data |
| Architecture codename | Phoenix (2023−2024) | Dragon Range-HX (Zen 4) (2023−2024) |
| Release date | 1 April 2024 (less than a year ago) | 17 January 2024 (less than a year ago) |
| Launch price (MSRP) | $170 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 5 8400F and Ryzen 9 7840HX 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 | 6 (Hexa-Core) | 12 (Dodeca-Core) |
| Threads | 12 | 24 |
| Base clock speed | 4.2 GHz | 2.9 GHz |
| Boost clock speed | 4.7 GHz | 5.1 GHz |
| L1 cache | 64 KB (per core) | 768 KB |
| L2 cache | 1 MB (per core) | 12 MB |
| L3 cache | 16 MB (shared) | 64 MB |
| Chip lithography | 4 nm | 5 nm |
| Die size | 178 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Number of transistors | 25,000 million | 9900 Million |
| 64 bit support | + | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 5 8400F and Ryzen 9 7840HX 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 | 1 | no data |
| Socket | AM5 | FL1 |
| Power consumption (TDP) | 65 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 5 8400F and Ryzen 9 7840HX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME |
| AES-NI | + | + |
| FMA | - | + |
| AVX | + | + |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 5 8400F and Ryzen 9 7840HX are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 5 8400F and Ryzen 9 7840HX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | AMD Radeon 610M |
Peripherals
Specifications and connection of peripherals supported by Ryzen 5 8400F and Ryzen 9 7840HX.
| PCIe version | 4.0 | no data |
| PCI Express lanes | 20 | no data |
Pros & cons summary
| Recency | 1 April 2024 | 17 January 2024 |
| Physical cores | 6 | 12 |
| Threads | 12 | 24 |
| Chip lithography | 4 nm | 5 nm |
| Power consumption (TDP) | 65 Watt | 55 Watt |
Ryzen 5 8400F has an age advantage of 2 months, and a 25% more advanced lithography process.
Ryzen 9 7840HX, on the other hand, has 100% more physical cores and 100% more threads, and 18.2% lower power consumption.
We couldn't decide between Ryzen 5 8400F and Ryzen 9 7840HX. We've got no test results to judge.
Note that Ryzen 5 8400F is a desktop processor while Ryzen 9 7840HX is a notebook one.
Should you still have questions on choice between Ryzen 5 8400F and Ryzen 9 7840HX, ask them in Comments section, and we shall answer.
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