i7-6785R vs Ryzen 9 3900X
Primary details
Comparing Ryzen 9 3900X and Core i7-6785R processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 269 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 20.85 | no data |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | Intel Core i7 |
| Power efficiency | 15.54 | no data |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Skylake (2015−2016) |
| Release date | 7 July 2019 (5 years ago) | 3 May 2016 (8 years ago) |
| Launch price (MSRP) | $499 | $370 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 3900X and Core i7-6785R 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 | 12 (Dodeca-Core) | 4 (Quad-Core) |
| Threads | 24 | 8 |
| Base clock speed | 3.8 GHz | 3.3 GHz |
| Boost clock speed | 4.6 GHz | 3.9 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | no data | 4 × 8 GT/s |
| Multiplier | no data | 33 |
| L1 cache | 96K (per core) | 64 KB (per core) |
| L2 cache | 512K (per core) | 256 KB (per core) |
| L3 cache | 64 MB | 8 MB (shared) |
| Chip lithography | 7 nm, 12 nm | 14 nm |
| Maximum core temperature | 95 °C | no data |
| Maximum case temperature (TCase) | no data | 71 °C |
| Number of transistors | 19,200 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 3900X and Core i7-6785R 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) | 1 (Uniprocessor) |
| Socket | AM4 | FCBGA1440 |
| Power consumption (TDP) | 125 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3900X and Core i7-6785R. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| eDRAM | no data | 128 MB |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Precision Boost 2 | + | no data |
Security technologies
Ryzen 9 3900X and Core i7-6785R technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| Secure Key | no data | + |
| MPX | - | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 3900X and Core i7-6785R 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 3900X and Core i7-6785R. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | DDR4-1866/2133, DDR3L-1333/1600 |
| Maximum memory size | 128 GB | 64 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 51.196 GB/s | 34.134 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | Intel Iris Pro Graphics 580 |
| Max video memory | - | 64 GB |
| Quick Sync Video | - | + |
| Clear Video | - | + |
| Clear Video HD | - | + |
| Graphics max frequency | - | 1.15 GHz |
| InTru 3D | - | + |
Graphics interfaces
Available interfaces and connections of Ryzen 9 3900X and Core i7-6785R integrated GPUs.
| Number of displays supported | - | 3 |
| eDP | - | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | - | + |
Graphics image quality
Maximum display resolutions supported by Ryzen 9 3900X and Core i7-6785R integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | - | + |
| Max resolution over HDMI 1.4 | - | 4096x2304@24Hz |
| Max resolution over eDP | - | 4096x2304@60Hz |
| Max resolution over DisplayPort | - | 4096x2304@60Hz |
| Max resolution over VGA | - | N/A |
Graphics API support
APIs supported by Ryzen 9 3900X and Core i7-6785R integrated GPUs, sometimes API versions are included.
| DirectX | - | 12 |
| OpenGL | - | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3900X and Core i7-6785R.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Recency | 7 July 2019 | 3 May 2016 |
| Physical cores | 12 | 4 |
| Threads | 24 | 8 |
| Chip lithography | 7 nm | 14 nm |
| Power consumption (TDP) | 125 Watt | 65 Watt |
Ryzen 9 3900X has an age advantage of 3 years, 200% more physical cores and 200% more threads, and a 100% more advanced lithography process.
i7-6785R, on the other hand, has 92.3% lower power consumption.
We couldn't decide between Ryzen 9 3900X and Core i7-6785R. We've got no test results to judge.
Should you still have questions on choice between Ryzen 9 3900X and Core i7-6785R, ask them in Comments section, and we shall answer.
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