i5-6400 vs Ryzen 9 9955HX
Aggregate performance score
Ryzen 9 9955HX outperforms Core i5-6400 by a whopping 739% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 185 | 1648 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 0.79 |
| Market segment | Laptop | Desktop processor |
| Series | AMD Dragon Range (Zen 4, Ryzen 7045) | Intel Core i5 |
| Power efficiency | 49.39 | 4.98 |
| Designer | AMD | Intel |
| Manufacturer | no data | Intel |
| Architecture codename | Fire Range-HX (Zen 5) (2025) | Skylake (2015−2016) |
| Release date | 6 January 2025 (less than a year ago) | 2 July 2015 (9 years ago) |
| Launch price (MSRP) | no data | $187 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 9955HX and Core i5-6400 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 | 16 (Hexadeca-Core) | 4 (Quad-Core) |
| Threads | 32 | 4 |
| Base clock speed | no data | 2.7 GHz |
| Boost clock speed | 5.4 GHz | 3.3 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | no data | 4 × 8 GT/s |
| Multiplier | no data | 27 |
| L1 cache | 1.3 MB | 64K (per core) |
| L2 cache | 16 MB | 256K (per core) |
| L3 cache | 64 MB | 6 MB (shared) |
| Chip lithography | no data | 14 nm |
| Die size | no data | 177 mm2 |
| Maximum case temperature (TCase) | no data | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | - |
Compatibility
Information on Ryzen 9 9955HX and Core i5-6400 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 (Uniprocessor) |
| Socket | no data | FCLGA1151 |
| Power consumption (TDP) | 55 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 9955HX and Core i5-6400. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
Security technologies
Ryzen 9 9955HX and Core i5-6400 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
| Secure Key | no data | + |
| MPX | - | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 9955HX and Core i5-6400 are enumerated here.
| AMD-V | - | + |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 9955HX and Core i5-6400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR3, DDR4 |
| Maximum memory size | no data | 64 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 34.134 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon 610M ( - 2200 MHz) | Intel HD Graphics 530 |
| Max video memory | no data | 64 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 950 MHz |
| InTru 3D | no data | + |
Graphics interfaces
Available interfaces and connections of Ryzen 9 9955HX and Core i5-6400 integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Ryzen 9 9955HX and Core i5-6400 integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@24Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
| Max resolution over VGA | no data | N/A |
Graphics API support
APIs supported by Ryzen 9 9955HX and Core i5-6400 integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 9955HX and Core i5-6400.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Performance score | 28.35 | 3.38 |
| Integrated graphics card | 2.62 | 2.38 |
| Recency | 6 January 2025 | 2 July 2015 |
| Physical cores | 16 | 4 |
| Threads | 32 | 4 |
| Power consumption (TDP) | 55 Watt | 65 Watt |
Ryzen 9 9955HX has a 738.8% higher aggregate performance score, 10.1% faster integrated GPU, an age advantage of 9 years, 300% more physical cores and 700% more threads, and 18.2% lower power consumption.
The AMD Ryzen 9 9955HX is our recommended choice as it beats the Intel Core i5-6400 in performance tests.
Be aware that Ryzen 9 9955HX is a notebook processor while Core i5-6400 is a desktop one.
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