EPYC Embedded 3351 vs Ultra 7 251HX
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 244 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Server |
| Series | Intel Arrow Lake | AMD EPYC Embedded |
| Designer | Intel | AMD |
| Manufacturer | no data | GlobalFoundries |
| Architecture codename | Arrow Lake-HX (2025−2026) | Zen (2017−2020) |
| Release date | 1 April 2026 (less than a year ago) | 21 February 2018 (8 years ago) |
Detailed specifications
Basic parameters of Core Ultra 7 251HX and EPYC Embedded 3351: 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 | 18 (Octadeca-Core) | 12 (Dodeca-Core) |
| Threads | 18 | 24 |
| Base clock speed | 2.5 GHz | 1.9 GHz |
| Boost clock speed | 5.1 GHz | 3 GHz |
| Multiplier | no data | 19 |
| L1 cache | no data | 96K (per core) |
| L2 cache | 30 MB | 512K (per core) |
| L3 cache | 30 MB | 32 MB (shared) |
| Chip lithography | 3 nm | 14 nm |
| Die size | no data | 2x 213 mm2 |
| Number of transistors | no data | 4,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | - |
Compatibility
Information on Core Ultra 7 251HX and EPYC Embedded 3351 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 | AMD BGA SP4r2 |
| Power consumption (TDP) | no data | 80 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core Ultra 7 251HX and EPYC Embedded 3351. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core Ultra 7 251HX and EPYC Embedded 3351 are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 251HX and EPYC Embedded 3351. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR4-2666 |
| Maximum memory size | no data | 1 TiB |
| Max memory channels | no data | 4 |
| Maximum memory bandwidth | no data | 85.33 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel Graphics 4-Core iGPU (Meteor / Arrow Lake) (300 - 1800 MHz) | no data |
Peripherals
Specifications and connection of peripherals supported by Core Ultra 7 251HX and EPYC Embedded 3351.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 64 |
Pros & cons summary
| Recency | 1 April 2026 | 21 February 2018 |
| Physical cores | 18 | 12 |
| Threads | 18 | 24 |
| Chip lithography | 3 nm | 14 nm |
Ultra 7 251HX has an age advantage of 8 years, 50% more physical cores, and a 367% more advanced lithography process.
EPYC Embedded 3351, on the other hand, has 33% more threads.
We couldn't decide between Intel Core Ultra 7 251HX and AMD EPYC Embedded 3351. We've got no test results to judge.
Be aware that Core Ultra 7 251HX is a notebook processor while EPYC Embedded 3351 is a server/workstation one.
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