Celeron 3855U vs Ryzen 9 3900X
Aggregate performance score
Ryzen 9 3900X outperforms Celeron 3855U by a whopping 2566% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 3900X and Celeron 3855U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 269 | 2636 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 20.85 | no data |
| Market segment | Desktop processor | Laptop |
| Series | AMD Ryzen 9 | Intel Celeron |
| Power efficiency | 15.54 | 4.86 |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Skylake (2015−2016) |
| Release date | 7 July 2019 (5 years ago) | 15 August 2015 (9 years ago) |
| Launch price (MSRP) | $499 | $107 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 3900X and Celeron 3855U 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) | 2 (Dual-core) |
| Threads | 24 | 2 |
| Base clock speed | 3.8 GHz | 1.6 GHz |
| Boost clock speed | 4.6 GHz | 1.6 GHz |
| Bus type | no data | OPI |
| Bus rate | no data | 4 GT/s |
| Multiplier | no data | 16 |
| L1 cache | 96K (per core) | 128 KB |
| L2 cache | 512K (per core) | 512 KB |
| L3 cache | 64 MB | 2 MB |
| Chip lithography | 7 nm, 12 nm | 14 nm |
| Die size | no data | 98.57 mm2 |
| Maximum core temperature | 95 °C | 100 °C |
| Number of transistors | 19,200 million | 1750 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen 9 3900X and Celeron 3855U 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 | FCBGA1356 |
| Power consumption (TDP) | 125 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3900X and Celeron 3855U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | + | + |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | no data | + |
| My WiFi | no data | + |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Smart Response | no data | + |
| Precision Boost 2 | + | no data |
Security technologies
Ryzen 9 3900X and Celeron 3855U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
| Secure Key | no data | + |
| 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 Celeron 3855U 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 Celeron 3855U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600 |
| Maximum memory size | 128 GB | 32 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 HD Graphics 510 |
| Max video memory | - | 32 GB |
| Quick Sync Video | - | + |
| Clear Video HD | - | + |
| Graphics max frequency | - | 900 MHz |
Graphics interfaces
Available interfaces and connections of Ryzen 9 3900X and Celeron 3855U integrated GPUs.
| Number of displays supported | - | 3 |
| eDP | - | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | - | + |
Graphics image quality
Maximum display resolutions supported by Ryzen 9 3900X and Celeron 3855U 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 Celeron 3855U integrated GPUs, sometimes API versions are included.
| DirectX | - | 12 |
| OpenGL | - | 4.4 |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3900X and Celeron 3855U.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 10 |
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.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Pros & cons summary
| Performance score | 20.53 | 0.77 |
| Recency | 7 July 2019 | 15 August 2015 |
| Physical cores | 12 | 2 |
| Threads | 24 | 2 |
| Chip lithography | 7 nm | 14 nm |
| Power consumption (TDP) | 125 Watt | 15 Watt |
Ryzen 9 3900X has a 2566.2% higher aggregate performance score, an age advantage of 3 years, 500% more physical cores and 1100% more threads, and a 100% more advanced lithography process.
Celeron 3855U, on the other hand, has 733.3% lower power consumption.
The Ryzen 9 3900X is our recommended choice as it beats the Celeron 3855U in performance tests.
Note that Ryzen 9 3900X is a desktop processor while Celeron 3855U is a notebook one.
Should you still have questions on choice between Ryzen 9 3900X and Celeron 3855U, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
