Xeon Gold 6426Y vs EPYC 7643
Aggregate performance score
EPYC 7643 outperforms Xeon Gold 6426Y by an impressive 99% based on our aggregate benchmark results.
Primary details
Comparing EPYC 7643 and Xeon Gold 6426Y processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 39 | 208 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 6.37 | 43.15 |
| Market segment | Server | Server |
| Series | AMD EPYC | no data |
| Power efficiency | 20.14 | 12.29 |
| Architecture codename | Milan (2021−2023) | Sapphire Rapids (2023−2024) |
| Release date | 15 March 2021 (3 years ago) | 10 January 2023 (1 year ago) |
| Launch price (MSRP) | $4,995 | $1,517 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Xeon Gold 6426Y has 577% better value for money than EPYC 7643.
Detailed specifications
EPYC 7643 and Xeon Gold 6426Y 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 | 48 (Octatetraconta-Core) | 16 (Hexadeca-Core) |
| Threads | 96 | 32 |
| Base clock speed | 2.3 GHz | 2.5 GHz |
| Boost clock speed | 3.6 GHz | 4.1 GHz |
| Multiplier | 23 | no data |
| L1 cache | 64 KB (per core) | 80K (per core) |
| L2 cache | 512 KB (per core) | 2 MB (per core) |
| L3 cache | 256 MB (shared) | 37.5 MB |
| Chip lithography | 7 nm+ | Intel 7 nm |
| Die size | 8x 81 mm2 | no data |
| Maximum case temperature (TCase) | no data | 80 °C |
| Number of transistors | 33,200 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
Compatibility
Information on EPYC 7643 and Xeon Gold 6426Y 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 | 2 |
| Socket | SP3 | FCLGA4677 |
| Power consumption (TDP) | 225 Watt | 185 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7643 and Xeon Gold 6426Y. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Deep Learning Boost | - | + |
Security technologies
EPYC 7643 and Xeon Gold 6426Y technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| SGX | no data | Yes with Intel® SPS |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7643 and Xeon Gold 6426Y are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 7643 and Xeon Gold 6426Y. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR5-4800, DDR5-4400 |
| Maximum memory size | 4 TiB | 4 TB |
| Max memory channels | no data | 8 |
| Maximum memory bandwidth | 204.795 GB/s | no data |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | no data |
Peripherals
Specifications and connection of peripherals supported by EPYC 7643 and Xeon Gold 6426Y.
| PCIe version | 4.0 | 5 |
| PCI Express lanes | 128 | 80 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 47.88 | 24.02 |
| Recency | 15 March 2021 | 10 January 2023 |
| Physical cores | 48 | 16 |
| Threads | 96 | 32 |
| Power consumption (TDP) | 225 Watt | 185 Watt |
EPYC 7643 has a 99.3% higher aggregate performance score, and 200% more physical cores and 200% more threads.
Xeon Gold 6426Y, on the other hand, has an age advantage of 1 year, and 21.6% lower power consumption.
The EPYC 7643 is our recommended choice as it beats the Xeon Gold 6426Y in performance tests.
Should you still have questions on choice between EPYC 7643 and Xeon Gold 6426Y, ask them in Comments section, and we shall answer.
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