Ryzen 5 PRO 8645HS vs EPYC 7551
Primary details
Comparing EPYC 7551 and Ryzen 5 PRO 8645HS processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 409 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.27 | no data |
| Market segment | Server | Server |
| Series | AMD EPYC | no data |
| Power efficiency | 8.59 | no data |
| Architecture codename | Naples (2017−2018) | Hawk Point (2024) |
| Release date | 29 June 2017 (7 years ago) | 16 April 2024 (less than a year ago) |
| Launch price (MSRP) | $3,400 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
EPYC 7551 and Ryzen 5 PRO 8645HS 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 | 32 (Dotriaconta-Core) | 6 (Hexa-Core) |
| Threads | 64 | 12 |
| Base clock speed | 2 GHz | 4.3 GHz |
| Boost clock speed | 3 GHz | 5 GHz |
| Multiplier | 20 | no data |
| L1 cache | 96K (per core) | 64 KB (per core) |
| L2 cache | 512K (per core) | 1 MB (per core) |
| L3 cache | 64 MB (shared) | 16 MB (shared) |
| Chip lithography | 14 nm | 4 nm |
| Die size | 192 mm2 | 178 mm2 |
| Number of transistors | 4,800 million | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on EPYC 7551 and Ryzen 5 PRO 8645HS 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 | 2 (Multiprocessor) | 1 |
| Socket | TR4 | FP7 |
| Power consumption (TDP) | 180 Watt | 45 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7551 and Ryzen 5 PRO 8645HS. 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 EPYC 7551 and Ryzen 5 PRO 8645HS are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 7551 and Ryzen 5 PRO 8645HS. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Eight-channel | DDR5 |
| Maximum memory size | 2 TiB | no data |
| Max memory channels | 8 | no data |
| Maximum memory bandwidth | 170.671 GB/s | no data |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | AMD Radeon 760M |
Peripherals
Specifications and connection of peripherals supported by EPYC 7551 and Ryzen 5 PRO 8645HS.
| PCIe version | 3.0 | 4.0 |
| PCI Express lanes | 128 | 20 |
Pros & cons summary
| Recency | 29 June 2017 | 16 April 2024 |
| Physical cores | 32 | 6 |
| Threads | 64 | 12 |
| Chip lithography | 14 nm | 4 nm |
| Power consumption (TDP) | 180 Watt | 45 Watt |
EPYC 7551 has 433.3% more physical cores and 433.3% more threads.
Ryzen 5 PRO 8645HS, on the other hand, has an age advantage of 6 years, a 250% more advanced lithography process, and 300% lower power consumption.
We couldn't decide between EPYC 7551 and Ryzen 5 PRO 8645HS. We've got no test results to judge.
Should you still have questions on choice between EPYC 7551 and Ryzen 5 PRO 8645HS, ask them in Comments section, and we shall answer.
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