Opteron X3421 vs Ryzen 9 8940HX
Aggregate performance score
Ryzen 9 8940HX outperforms Opteron X3421 by a whopping 1578% 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 | 138 | 2062 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Workstation |
| Power efficiency | 24.18 | 5.28 |
| Designer | AMD | AMD |
| Manufacturer | TSMC | GlobalFoundries |
| Architecture codename | Dragon Range (2025) | Excavator (2017−2018) |
| Release date | 23 April 2025 (less than a year ago) | 10 June 2017 (8 years ago) |
Detailed specifications
Ryzen 9 8940HX and Opteron X3421 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 | 16 (Hexadeca-Core) | 4 (Quad-Core) |
| Threads | 32 | 4 |
| Base clock speed | 2.4 GHz | 2.1 GHz |
| Boost clock speed | 5.3 GHz | 3.4 GHz |
| L1 cache | 64 KB (per core) | 160 KB |
| L2 cache | 1 MB (per core) | 2 MB (shared) |
| L3 cache | 64 MB (shared) | no data |
| Chip lithography | 5 nm | 28 nm |
| Die size | 2x 71 mm2 | 250 mm2 |
| Maximum case temperature (TCase) | no data | 82 °C |
| Number of transistors | 13,140 million | 3,100 million |
| 64 bit support | + | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 8940HX and Opteron X3421 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 | 1 | 1 |
| Socket | FL1 | FP4 |
| Power consumption (TDP) | 55 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 8940HX and Opteron X3421. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | - | + |
| AVX | + | + |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 8940HX and Opteron X3421 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 8940HX and Opteron X3421. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR4 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon 610M | Radeon Rx Series 8CU |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 8940HX and Opteron X3421.
| PCIe version | 5.0 | 3.0 |
| PCI Express lanes | 28 | 8 |
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 | 34.39 | 2.05 |
| Recency | 23 April 2025 | 10 June 2017 |
| Physical cores | 16 | 4 |
| Threads | 32 | 4 |
| Chip lithography | 5 nm | 28 nm |
| Power consumption (TDP) | 55 Watt | 15 Watt |
Ryzen 9 8940HX has a 1577.6% higher aggregate performance score, an age advantage of 7 years, 300% more physical cores and 700% more threads, and a 460% more advanced lithography process.
Opteron X3421, on the other hand, has 266.7% lower power consumption.
The AMD Ryzen 9 8940HX is our recommended choice as it beats the AMD Opteron X3421 in performance tests.
Be aware that Ryzen 9 8940HX is a notebook processor while Opteron X3421 is a server/workstation one.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
