EPYC 9645 vs EPYC 9755
Primary details
Comparing EPYC 9755 and EPYC 9645 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Architecture codename | Turin (2024) | Turin (2024) |
| Release date | 10 October 2024 (less than a year ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | $12,984 | $11,048 |
Detailed specifications
EPYC 9755 and EPYC 9645 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 | 128 | 96 |
| Threads | 256 | 192 |
| Base clock speed | 2.7 GHz | 2.3 GHz |
| Boost clock speed | 4.1 GHz | 3.7 GHz |
| L1 cache | 80 KB (per core) | 80 KB (per core) |
| L2 cache | 1 MB (per core) | 1 MB (per core) |
| L3 cache | 512 MB (shared) | 256 MB (shared) |
| Chip lithography | 4 nm | 3 nm |
| Die size | 16x 70.6 mm2 | no data |
| Number of transistors | 133,040 million | no data |
| 64 bit support | + | + |
Compatibility
Information on EPYC 9755 and EPYC 9645 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 | SP5 | SP5 |
| Power consumption (TDP) | 500 Watt | 320 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 9755 and EPYC 9645. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 9755 and EPYC 9645 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 9755 and EPYC 9645. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | N/A |
Peripherals
Specifications and connection of peripherals supported by EPYC 9755 and EPYC 9645.
| PCIe version | 5.0 | 5.0 |
| PCI Express lanes | 128 | 128 |
Pros & cons summary
| Physical cores | 128 | 96 |
| Threads | 256 | 192 |
| Chip lithography | 4 nm | 3 nm |
| Power consumption (TDP) | 500 Watt | 320 Watt |
EPYC 9755 has 33.3% more physical cores and 33.3% more threads.
EPYC 9645, on the other hand, has a 33.3% more advanced lithography process, and 56.3% lower power consumption.
We couldn't decide between EPYC 9755 and EPYC 9645. We've got no test results to judge.
Should you still have questions on choice between EPYC 9755 and EPYC 9645, ask them in Comments section, and we shall answer.
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