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AMD EPYC 7251 vs AMD EPYC Embedded 7551: Comparison
EPYC 7251 vs EPYC Embedded 7551: the l3 cache difference
Start with l3 cache, because it is the widest measured gap between them: EPYC 7251 32 MB against EPYC Embedded 7551 64 MB, 50% in favour of EPYC Embedded 7551. There is a split on boost clock as well, Up to 2.9 GHz on the EPYC 7251 versus 3 GHz on the EPYC Embedded 7551. They differ on tdp too, 120 W on the EPYC 7251 versus 180 W on the EPYC Embedded 7551. Core count is not the same on both, 8 cores on the EPYC 7251 versus 32 cores on the EPYC Embedded 7551. There is a split on thread count as well, 16 threads on the EPYC 7251 versus 64 threads on the EPYC Embedded 7551. They differ on base clock too, 2.1 GHz on the EPYC 7251 versus 2 GHz on the EPYC Embedded 7551.
Which should you buy, EPYC 7251 or EPYC Embedded 7551?
The EPYC 7251 suits datacenter and cloud compute and virtualization-dense server workloads, though it is not built for consumer desktop builds and single-threaded latency-sensitive workloads on lower core-count SKUs. The EPYC Embedded 7551 is the one to take for industrial and embedded system designs and long-lifecycle networking and edge-compute deployments, though it is the wrong buy for consumer desktop or gaming builds and DIY PC upgrades.
What EPYC 7251 and EPYC Embedded 7551 have in common
The common ground is wider than the gap: pcie lanes and socket are identical here.
Specs and benchmarks
Core Count
- AMD EPYC 7251
- 8 cores
- AMD EPYC Embedded 7551
- 32 cores
Thread Count
- AMD EPYC 7251
- 16 threads
- AMD EPYC Embedded 7551
- 64 threads
Base Clock
- AMD EPYC 7251
- 2.1 GHz
- AMD EPYC Embedded 7551
- 2 GHz
Boost Clock
- AMD EPYC 7251
- Up to 2.9 GHz
- AMD EPYC Embedded 7551
- 3 GHz
L3 Cache
- AMD EPYC 7251
- 32 MB-50%
- AMD EPYC Embedded 7551
- 64 MBBest
Socket
- AMD EPYC 7251
- SP3
- AMD EPYC Embedded 7551
- SP3
PCIe Lanes
- AMD EPYC 7251
- 128 lanes
- AMD EPYC Embedded 7551
- 128 lanes
TDP
- AMD EPYC 7251
- 120 W
- AMD EPYC Embedded 7551
- 180 W
Which one should you pick?
Choose 7251 if you want the higher PCIe lanes (128 lanes vs 128 lanes).
Choose 7551 if you want the higher L3 cache (64 MB vs 32 MB).