EPYC 4585PX vs Ryzen 9 9955HX3D
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 116 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Server |
| Series | AMD Dragon Range (Zen 4, Ryzen 7045) | no data |
| Power efficiency | 63.26 | no data |
| Designer | AMD | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Fire Range-HX (Zen 5) (2025) | Grado (2025) |
| Release date | 6 January 2025 (less than a year ago) | 13 May 2025 (recently) |
| Launch price (MSRP) | no data | $699 |
Detailed specifications
Ryzen 9 9955HX3D and EPYC 4585PX 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) | 16 (Hexadeca-Core) |
| Threads | 32 | 32 |
| Base clock speed | no data | 4.3 GHz |
| Boost clock speed | 5.4 GHz | 5.7 GHz |
| L1 cache | 1.3 MB | 80 KB (per core) |
| L2 cache | 16 MB | 1 MB (per core) |
| L3 cache | 128 MB | 128 MB (shared) |
| Chip lithography | no data | 4 nm |
| Die size | no data | 2x 70.6 mm2 |
| Number of transistors | no data | 16,630 million |
| 64 bit support | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 9 9955HX3D and EPYC 4585PX 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 | AM5 |
| Power consumption (TDP) | 55 Watt | 170 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 9955HX3D and EPYC 4585PX. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 9955HX3D and EPYC 4585PX are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 9955HX3D and EPYC 4585PX. 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 | AMD Radeon 610M ( - 2200 MHz) | AMD Radeon Graphics |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 9955HX3D and EPYC 4585PX.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 24 |
Pros & cons summary
| Integrated graphics card | 2.78 | 1.92 |
| Recency | 6 January 2025 | 13 May 2025 |
| Power consumption (TDP) | 55 Watt | 170 Watt |
Ryzen 9 9955HX3D has 44.8% faster integrated GPU, and 209.1% lower power consumption.
EPYC 4585PX, on the other hand, has an age advantage of 4 months.
We couldn't decide between AMD Ryzen 9 9955HX3D and AMD EPYC 4585PX. We've got no test results to judge.
Be aware that Ryzen 9 9955HX3D is a notebook processor while EPYC 4585PX is a server/workstation one.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
