Ryzen 9 7945HX3D vs EPYC 7742
Aggregate performance score
EPYC 7742 outperforms Ryzen 9 7945HX3D by a significant 20% based on our aggregate benchmark results.
Primary details
Comparing EPYC 7742 and Ryzen 9 7945HX3D processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 39 | 79 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 25.57 | no data |
| Market segment | Server | Laptop |
| Series | AMD EPYC | AMD Dragon Range (Zen 4, Ryzen 7045) |
| Architecture codename | Zen 2 (2019−2020) | Dragon Range-HX (Zen 4) |
| Release date | 7 August 2019 (4 years ago) | 28 July 2023 (less than a year ago) |
| Launch price (MSRP) | $6,950 | no data |
| Current price | $1656 (0.2x MSRP) | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
EPYC 7742 and Ryzen 9 7945HX3D 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 | 64 (Tetrahexaconta-Core) | 16 (Hexadeca-Core) |
| Threads | 128 | 32 |
| Base clock speed | 2.25 GHz | 2.3 GHz |
| Boost clock speed | 3.4 GHz | 5.4 GHz |
| L1 cache | 96K (per core) | 1 MB |
| L2 cache | 512K (per core) | 16 MB |
| L3 cache | 256 MB (shared) | 128 MB |
| Chip lithography | 7 nm, 14 nm | 5 nm |
| Die size | 192 mm2 | 2x 71 mm2 |
| Maximum core temperature | no data | 89 °C |
| Number of transistors | 4,800 million | 17,840 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | Yes | Yes |
Compatibility
Information on EPYC 7742 and Ryzen 9 7945HX3D 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 (Multiprocessor) | 1 |
| Socket | TR4 | FL1 |
| Power consumption (TDP) | 225 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7742 and Ryzen 9 7945HX3D. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7742 and Ryzen 9 7945HX3D are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 7742 and Ryzen 9 7945HX3D. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Eight-channel | DDR5-5200 |
| Maximum memory size | 4 TiB | no data |
| Max memory channels | 8 | no data |
| Maximum memory bandwidth | 204.763 GB/s | no data |
| ECC memory support | + | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | AMD Radeon 610M |
Peripherals
Specifications and connection of peripherals supported by EPYC 7742 and Ryzen 9 7945HX3D.
| PCIe version | no data | 5.0 |
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.
EPYC 7742 outperforms Ryzen 9 7945HX3D by 20% based on our aggregate benchmark results.
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.
Benchmark coverage: 68%
EPYC 7742 outperforms Ryzen 9 7945HX3D by 20% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Ryzen 9 7945HX3D outperforms EPYC 7742 by 134% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Ryzen 9 7945HX3D outperforms EPYC 7742 by 40% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 44.73 | 37.37 |
| Recency | 7 August 2019 | 28 July 2023 |
| Physical cores | 64 | 16 |
| Threads | 128 | 32 |
| Chip lithography | 7 nm | 5 nm |
| Power consumption (TDP) | 225 Watt | 55 Watt |
The EPYC 7742 is our recommended choice as it beats the Ryzen 9 7945HX3D in performance tests.
Be aware that EPYC 7742 is a server/workstation processor while Ryzen 9 7945HX3D is a notebook one.
Should you still have questions on choice between EPYC 7742 and Ryzen 9 7945HX3D, ask them in Comments section, and we shall answer.
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