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AMD EPYC 9456P vs AMD EPYC 9646P: Comparison
What is the difference between EPYC 9456P and EPYC 9646P?
The first real difference is tdp: EPYC 9456P 265 W against EPYC 9646P 300 W. Core count is not the same on both, 48 cores on the EPYC 9456P versus 96 cores on the EPYC 9646P. Thread count is not the same on both, 96 threads on the EPYC 9456P versus 192 threads on the EPYC 9646P. They differ on base clock too, 3.2 GHz on the EPYC 9456P versus 2.8 GHz on the EPYC 9646P. Launch price is not the same on both, $4,628 on the EPYC 9456P versus $8,001 on the EPYC 9646P.
Which should you buy, EPYC 9456P or EPYC 9646P?
Buy the EPYC 9456P 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 9646P is the one to take for 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
Everything else lines up. Boost clock, configurable tdp max, l3 cache, memory channels and pcie lanes read the same on both, so those are not worth weighing. They match on 13 further specifications as well.
Frequently asked questions
Is the CPU Socket the same on the EPYC 9456P and EPYC 9646P?
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 9646P
- AMD
Model Number
- AMD EPYC 9456P
- 9456P
- AMD EPYC 9646P
- 9646P
CPU Socket
- AMD EPYC 9456P
- SP8
- AMD EPYC 9646P
- SP8
Product Family
- AMD EPYC 9456P
- EPYC 9006 Series
- AMD EPYC 9646P
- EPYC 9006 Series
Segment
- AMD EPYC 9456P
- Data Center
- AMD EPYC 9646P
- Data Center
Core Count
- AMD EPYC 9456P
- 48 cores
- AMD EPYC 9646P
- 96 cores
Thread Count
- AMD EPYC 9456P
- 96 threads
- AMD EPYC 9646P
- 192 threads
SMT Support
- AMD EPYC 9456P
- Yes
- AMD EPYC 9646P
- Yes
Base Clock
- AMD EPYC 9456P
- 3.2 GHz
- AMD EPYC 9646P
- 2.8 GHz
Boost Clock
- AMD EPYC 9456P
- 3.7 GHz
- AMD EPYC 9646P
- 3.7 GHz
L3 Cache
- AMD EPYC 9456P
- 256 MB
- AMD EPYC 9646P
- 256 MB
Socket
- AMD EPYC 9456P
- SP8
- AMD EPYC 9646P
- SP8
Multi-Socket Support
- AMD EPYC 9456P
- Single Socket Only
- AMD EPYC 9646P
- Single Socket Only
Memory Channels
- AMD EPYC 9456P
- 8 channels
- AMD EPYC 9646P
- 8 channels
Memory Type
- AMD EPYC 9456P
- DDR5 RDIMM
- AMD EPYC 9646P
- DDR5 RDIMM
Max Memory Speed
- AMD EPYC 9456P
- 8000 MT/s
- AMD EPYC 9646P
- 8000 MT/s
Registered Memory Required
- AMD EPYC 9456P
- Yes
- AMD EPYC 9646P
- Yes
PCIe Lanes
- AMD EPYC 9456P
- 128 lanes
- AMD EPYC 9646P
- 128 lanes
PCIe Generation
- AMD EPYC 9456P
- PCIe 6.0
- AMD EPYC 9646P
- PCIe 6.0
TDP
- AMD EPYC 9456P
- 265 W
- AMD EPYC 9646P
- 300 W
Configurable TDP Max
- AMD EPYC 9456P
- 300 W
- AMD EPYC 9646P
- 300 W
Launch Price
- AMD EPYC 9456P
- $4,628
- AMD EPYC 9646P
- $8,001
Memory Bandwidth
- AMD EPYC 9456P
- 512 GB/s / 819.2 GB/s
- AMD EPYC 9646P
- 512 GB/s / 819.2 GB/s
PCIe
- AMD EPYC 9456P
- PCIe 6.0 x128
- AMD EPYC 9646P
- 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 9646P
- 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 9646P if you already have it on hand or find it at a lower price.