K6-2/400ACK vs Ryzen 9 3950X
Primary details
Comparing Ryzen 9 3950X and K6-2/400ACK processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 209 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 18.85 | no data |
| Market segment | Desktop processor | Laptop |
| Series | AMD Ryzen 9 | AMD K6-2 |
| Power efficiency | 21.86 | no data |
| Architecture codename | Matisse (Zen 2) (2019−2020) | K6-2 (1998−1999) |
| Release date | 14 November 2019 (5 years ago) | 22 March 1999 (25 years ago) |
| Launch price (MSRP) | $799 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 3950X and K6-2/400ACK 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) | 1 (Single-Core) |
| Threads | 32 | 1 |
| Base clock speed | 3.5 GHz | no data |
| Boost clock speed | 4.7 GHz | 0.1 GHz |
| Bus type | no data | FSB |
| Bus rate | no data | 99.99 MT/s |
| Multiplier | no data | 4 |
| L1 cache | 96K (per core) | no data |
| L2 cache | 512K (per core) | no data |
| L3 cache | 64 MB | no data |
| Chip lithography | 7 nm, 12 nm | 0.25 µm |
| Die size | 2 x 72 mm + 125 mm (IO-Die) mm2 | 81 mm2 |
| Number of transistors | 19,200 million | 9 Million |
| 64 bit support | + | - |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 3950X and K6-2/400ACK 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 (Uniprocessor) | no data |
| Socket | AM4 | no data |
| Power consumption (TDP) | 105 Watt | no data |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3950X and K6-2/400ACK. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2 | no data |
| AES-NI | + | - |
| AVX | + | - |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 3950X and K6-2/400ACK are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3950X and K6-2/400ACK. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | no data |
| Maximum memory size | 128 GB | 4 GB |
| Maximum memory bandwidth | 51.196 GB/s | no data |
| ECC memory support | + | - |
Pros & cons summary
| Recency | 14 November 2019 | 22 March 1999 |
| Physical cores | 16 | 1 |
| Threads | 32 | 1 |
Ryzen 9 3950X has an age advantage of 20 years, and 1500% more physical cores and 3100% more threads.
We couldn't decide between Ryzen 9 3950X and K6-2/400ACK. We've got no test results to judge.
Note that Ryzen 9 3950X is a desktop processor while K6-2/400ACK is a notebook one.
Should you still have questions on choice between Ryzen 9 3950X and K6-2/400ACK, ask them in Comments section, and we shall answer.
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