Xeon 6781P vs Ryzen 9 3950X
Aggregate performance score
Xeon 6781P outperforms Ryzen 9 3950X by a whopping 206% 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 | 299 | 21 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 16.07 | no data |
| Market segment | Desktop processor | Server |
| Series | AMD Ryzen 9 | no data |
| Power efficiency | 8.83 | 8.11 |
| Designer | AMD | Intel |
| Manufacturer | TSMC | no data |
| Architecture codename | Matisse (Zen 2) (2019−2020) | no data |
| Release date | 14 November 2019 (5 years ago) | 1 January 2025 (less than a year ago) |
| Launch price (MSRP) | $799 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Ryzen 9 3950X and Xeon 6781P 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) | 80 |
| Threads | 32 | 160 |
| Base clock speed | 3.5 GHz | 2 GHz |
| Boost clock speed | 4.7 GHz | 3.8 GHz |
| L1 cache | 96K (per core) | no data |
| L2 cache | 512K (per core) | no data |
| L3 cache | 64 MB | 336 MB |
| Chip lithography | 7 nm, 12 nm | Intel 3 nm |
| Die size | 2 x 72 mm + 125 mm (IO-Die) mm2 | no data |
| Maximum core temperature | no data | 81 °C |
| Number of transistors | 19,200 million | no data |
| 64 bit support | + | - |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 3950X and Xeon 6781P 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 | FCLGA4710 |
| Power consumption (TDP) | 105 Watt | 350 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3950X and Xeon 6781P. 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 | Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | - |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Precision Boost 2 | + | no data |
| Deep Learning Boost | - | + |
Security technologies
Ryzen 9 3950X and Xeon 6781P technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| SGX | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 3950X and Xeon 6781P are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3950X and Xeon 6781P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | DDR5(6400MT/s), MRDIMM(8800MT/s) |
| Maximum memory size | 128 GB | 4 TB |
| Max memory channels | no data | 8 |
| Maximum memory bandwidth | 51.196 GB/s | no data |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3950X and Xeon 6781P.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 136 |
Synthetic benchmarks
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 | 21.87 | 66.95 |
| Recency | 14 November 2019 | 1 January 2025 |
| Physical cores | 16 | 80 |
| Threads | 32 | 160 |
| Power consumption (TDP) | 105 Watt | 350 Watt |
Ryzen 9 3950X has 233.3% lower power consumption.
Xeon 6781P, on the other hand, has a 206.1% higher aggregate performance score, an age advantage of 5 years, and 400% more physical cores and 400% more threads.
The Intel Xeon 6781P is our recommended choice as it beats the AMD Ryzen 9 3950X in performance tests.
Note that Ryzen 9 3950X is a desktop processor while Xeon 6781P 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.
