EPYC 9845 vs EPYC 9745
Aggregate performance score
EPYC 9845 outperforms EPYC 9745 by a minimal 1% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3 | 2 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.49 | 0.62 |
| Market segment | Server | Server |
| Power efficiency | 22.53 | 23.42 |
| Designer | AMD | AMD |
| Manufacturer | TSMC | TSMC |
| 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) | $12,141 | $13,564 |
Cost-effectiveness evaluation
Performance per price, higher is better.
EPYC 9745 has 140% better value for money than EPYC 9845.
Detailed specifications
EPYC 9745 and EPYC 9845 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 | 160 |
| Threads | 256 | 320 |
| Base clock speed | 2.4 GHz | 2.1 GHz |
| Boost clock speed | 3.7 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 | 256 MB (shared) | 320 MB (shared) |
| Chip lithography | 3 nm | 3 nm |
| 64 bit support | + | + |
Compatibility
Information on EPYC 9745 and EPYC 9845 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) | 400 Watt | 390 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 9745 and EPYC 9845. 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 9745 and EPYC 9845 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 9745 and EPYC 9845. 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 9745 and EPYC 9845.
| PCIe version | 5.0 | 5.0 |
| PCI Express lanes | 128 | 128 |
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.
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. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 94.08 | 95.37 |
| Physical cores | 128 | 160 |
| Threads | 256 | 320 |
| Power consumption (TDP) | 400 Watt | 390 Watt |
EPYC 9845 has a 1.4% higher aggregate performance score, 25% more physical cores and 25% more threads, and 2.6% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between AMD EPYC 9745 and AMD EPYC 9845.
Other comparisons
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