EPYC 7742 vs EPYC 9684X
Aggregate performance score
EPYC 9684X outperforms EPYC 7742 by an impressive 73% based on our aggregate benchmark results.
Primary details
Comparing EPYC 9684X and EPYC 7742 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 4 | 45 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 3.47 |
| Market segment | Server | Server |
| Series | no data | AMD EPYC |
| Power efficiency | 17.99 | 18.45 |
| Architecture codename | Genoa-X (2023) | Zen 2 (2017−2020) |
| Release date | 13 June 2023 (1 year ago) | 7 August 2019 (5 years ago) |
| Launch price (MSRP) | $14,756 | $6,950 |
Cost-effectiveness evaluation
Performance per price, higher is better.
EPYC 9684X and EPYC 7742 have a nearly equal value for money.
Detailed specifications
EPYC 9684X and EPYC 7742 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 | 96 | 64 (Tetrahexaconta-Core) |
| Threads | 192 | 128 |
| Base clock speed | 2.55 GHz | 2.25 GHz |
| Boost clock speed | 3.7 GHz | 3.4 GHz |
| Multiplier | no data | 22.5 |
| L1 cache | 64 KB (per core) | 96K (per core) |
| L2 cache | 1 MB (per core) | 512K (per core) |
| L3 cache | 1152 MB (shared) | 256 MB (shared) |
| Chip lithography | 5 nm | 7 nm, 14 nm |
| Die size | 12x 72 mm2 | 192 mm2 |
| Number of transistors | 135,240 million | 4,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | + |
| Unlocked multiplier | - | + |
Compatibility
Information on EPYC 9684X and EPYC 7742 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 (Multiprocessor) |
| Socket | SP5 | TR4 |
| Power consumption (TDP) | 400 Watt | 225 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 9684X and EPYC 7742. 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 9684X and EPYC 7742 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 9684X and EPYC 7742. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR4 Eight-channel |
| Maximum memory size | no data | 4 TiB |
| Max memory channels | no data | 8 |
| Maximum memory bandwidth | no data | 204.763 GB/s |
| 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 9684X and EPYC 7742.
| PCIe version | 5.0 | no data |
| PCI Express lanes | 128 | no data |
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 | 78.91 | 45.52 |
| Recency | 13 June 2023 | 7 August 2019 |
| Physical cores | 96 | 64 |
| Threads | 192 | 128 |
| Chip lithography | 5 nm | 7 nm |
| Power consumption (TDP) | 400 Watt | 225 Watt |
EPYC 9684X has a 73.4% higher aggregate performance score, an age advantage of 3 years, 50% more physical cores and 50% more threads, and a 40% more advanced lithography process.
EPYC 7742, on the other hand, has 77.8% lower power consumption.
The EPYC 9684X is our recommended choice as it beats the EPYC 7742 in performance tests.
Should you still have questions on choice between EPYC 9684X and EPYC 7742, ask them in Comments section, and we shall answer.
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