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AMD EPYC 9456P vs AMD EPYC 9646: Comparison
EPYC 9456P vs EPYC 9646 tdp compared
Tdp is the dividing line, EPYC 9456P 265 W against EPYC 9646 300 W. There is a split on core count as well, 48 cores on the EPYC 9456P versus 96 cores on the EPYC 9646. Thread count is not the same on both, 96 threads on the EPYC 9456P versus 192 threads on the EPYC 9646. They differ on base clock too, 3.2 GHz on the EPYC 9456P versus 2.8 GHz on the EPYC 9646. Multi-socket support is not the same on both, Single Socket Only on the EPYC 9456P versus Dual Socket on the EPYC 9646. They differ on launch price too, $4,628 on the EPYC 9456P versus $8,904 on the EPYC 9646.
Which should you buy, EPYC 9456P or EPYC 9646?
The EPYC 9456P is the one to take for 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 9646 suits datacenter and cloud compute and virtualization-dense server workloads, though it is not the pick for consumer desktop builds and single-threaded latency-sensitive workloads on lower core-count SKUs.
Where the two are identical
The common ground is wider than the gap: boost clock, configurable tdp max, l3 cache, memory channels and pcie lanes are identical here. They match on 12 further specifications as well.
Frequently asked questions
Is the CPU Socket the same on the EPYC 9456P and EPYC 9646?
It is. Both are listed at SP8, so it is not a reason to pick one over the other.
Specs and benchmarks
Brand
- AMD EPYC 9456P
- AMD
- AMD EPYC 9646
- AMD
Model Number
- AMD EPYC 9456P
- 9456P
- AMD EPYC 9646
- 9646
CPU Socket
- AMD EPYC 9456P
- SP8
- AMD EPYC 9646
- SP8
Product Family
- AMD EPYC 9456P
- EPYC 9006 Series
- AMD EPYC 9646
- EPYC 9006 Series
Segment
- AMD EPYC 9456P
- Data Center
- AMD EPYC 9646
- Data Center
Core Count
- AMD EPYC 9456P
- 48 cores
- AMD EPYC 9646
- 96 cores
Thread Count
- AMD EPYC 9456P
- 96 threads
- AMD EPYC 9646
- 192 threads
SMT Support
- AMD EPYC 9456P
- Yes
- AMD EPYC 9646
- Yes
Base Clock
- AMD EPYC 9456P
- 3.2 GHz
- AMD EPYC 9646
- 2.8 GHz
Boost Clock
- AMD EPYC 9456P
- 3.7 GHz
- AMD EPYC 9646
- 3.7 GHz
L3 Cache
- AMD EPYC 9456P
- 256 MB
- AMD EPYC 9646
- 256 MB
Socket
- AMD EPYC 9456P
- SP8
- AMD EPYC 9646
- SP8
Multi-Socket Support
- AMD EPYC 9456P
- Single Socket Only
- AMD EPYC 9646
- Dual Socket
Memory Channels
- AMD EPYC 9456P
- 8 channels
- AMD EPYC 9646
- 8 channels
Memory Type
- AMD EPYC 9456P
- DDR5 RDIMM
- AMD EPYC 9646
- DDR5 RDIMM
Max Memory Speed
- AMD EPYC 9456P
- 8000 MT/s
- AMD EPYC 9646
- 8000 MT/s
Registered Memory Required
- AMD EPYC 9456P
- Yes
- AMD EPYC 9646
- Yes
PCIe Lanes
- AMD EPYC 9456P
- 128 lanes
- AMD EPYC 9646
- 128 lanes
PCIe Generation
- AMD EPYC 9456P
- PCIe 6.0
- AMD EPYC 9646
- PCIe 6.0
TDP
- AMD EPYC 9456P
- 265 W
- AMD EPYC 9646
- 300 W
Configurable TDP Max
- AMD EPYC 9456P
- 300 W
- AMD EPYC 9646
- 300 W
Launch Price
- AMD EPYC 9456P
- $4,628
- AMD EPYC 9646
- $8,904
Memory Bandwidth
- AMD EPYC 9456P
- 512 GB/s / 819.2 GB/s
- AMD EPYC 9646
- 512 GB/s / 819.2 GB/s
PCIe
- AMD EPYC 9456P
- PCIe 6.0 x128
- AMD EPYC 9646
- PCIe 6.0 x128
Memory Support
- AMD EPYC 9456P
- DDR5 RDIMM | MRDIMM, 8-Channel, Up to 8000 MT/s / Up to 12800 MT/s
- AMD EPYC 9646
- DDR5 RDIMM | MRDIMM, 8-Channel, Up to 8000 MT/s / Up to 12800 MT/s
Which one should you pick?
Choose 9456P if you want the higher L3 cache (256 MB vs 256 MB), the higher memory channels (8 channels vs 8 channels) and the higher PCIe lanes (128 lanes vs 128 lanes).
Choose 9646 if you already have it on hand or find it at a lower price.