Xeon Gold 6338 vs EPYC 7643
Aggregate performance score
EPYC 7643 outperforms Xeon Gold 6338 by a whopping 125% based on our aggregate benchmark results.
Primary details
Comparing EPYC 7643 and Xeon Gold 6338 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 38 | 256 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 6.71 | no data |
| Market segment | Server | Server |
| Series | AMD EPYC | no data |
| Power efficiency | 20.14 | 9.83 |
| Architecture codename | Milan (2021−2023) | no data |
| Release date | 12 January 2021 (3 years ago) | 1 April 2021 (3 years ago) |
| Launch price (MSRP) | $4,995 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
EPYC 7643 and Xeon Gold 6338 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) | 32 (Dotriaconta-Core) |
| Threads | 96 | 64 |
| Base clock speed | 2.3 GHz | 2 GHz |
| Boost clock speed | 3.6 GHz | 3.2 GHz |
| Multiplier | 23 | no data |
| L1 cache | 3 MB | no data |
| L2 cache | 24 MB | no data |
| L3 cache | 256 MB (shared) | 48 MB |
| Chip lithography | 7 nm+ | 10 nm |
| Die size | 8x 81 mm2 | no data |
| Maximum core temperature | no data | 81 °C |
| Number of transistors | 33,200 million | no data |
| 64 bit support | + | - |
| Windows 11 compatibility | + | + |
Compatibility
Information on EPYC 7643 and Xeon Gold 6338 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 | no data |
| Socket | SP3 | FCLGA4189 |
| Power consumption (TDP) | 225 Watt | 205 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7643 and Xeon Gold 6338. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | - |
| 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 6338 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| SGX | no data | Yes with Intel® SPS |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7643 and Xeon Gold 6338 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 6338. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR4-3200 |
| Maximum memory size | 4 TiB | 6 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 6338.
| PCIe version | 4.0 | 4.0 |
| PCI Express lanes | 128 | 64 |
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 | 21.29 |
| Recency | 12 January 2021 | 1 April 2021 |
| Physical cores | 48 | 32 |
| Threads | 96 | 64 |
| Chip lithography | 7 nm | 10 nm |
| Power consumption (TDP) | 225 Watt | 205 Watt |
EPYC 7643 has a 124.9% higher aggregate performance score, 50% more physical cores and 50% more threads, and a 42.9% more advanced lithography process.
Xeon Gold 6338, on the other hand, has an age advantage of 2 months, and 9.8% lower power consumption.
The EPYC 7643 is our recommended choice as it beats the Xeon Gold 6338 in performance tests.
Should you still have questions on choice between EPYC 7643 and Xeon Gold 6338, ask them in Comments section, and we shall answer.
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