Celeron 3955U vs Phenom II X3 P840
Aggregate performance score
Celeron 3955U outperforms Phenom II X3 P840 by a moderate 13% based on our aggregate benchmark results.
Primary details
Comparing Phenom II X3 P840 and Celeron 3955U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2580 | 2507 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | 3x AMD Phenom II | Intel Celeron |
| Power efficiency | 3.12 | 5.88 |
| Architecture codename | Champlain (2010−2011) | Skylake (2015−2016) |
| Release date | 4 October 2010 (14 years ago) | 15 August 2015 (9 years ago) |
| Launch price (MSRP) | no data | $107 |
Detailed specifications
Phenom II X3 P840 and Celeron 3955U 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 | 3 (Tri-Core) | 2 (Dual-core) |
| Threads | 3 | 2 |
| Base clock speed | no data | 2 GHz |
| Boost clock speed | 1.9 GHz | 2 GHz |
| Bus type | no data | OPI |
| Bus rate | 3600 MHz | 4 GT/s |
| Multiplier | no data | 20 |
| L1 cache | 384 KB | 128 KB |
| L2 cache | 1.5 MB | 512 KB |
| L3 cache | no data | 2 MB |
| Chip lithography | 45 nm | 14 nm |
| Die size | no data | 98.57 mm2 |
| Maximum core temperature | no data | 100 °C |
| Number of transistors | no data | 1750 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom II X3 P840 and Celeron 3955U 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 | no data | 1 (Uniprocessor) |
| Socket | S1 | FCBGA1356 |
| Power consumption (TDP) | 25 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X3 P840 and Celeron 3955U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Virtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a) | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | - | + |
| VirusProtect | + | - |
| 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 | + |
Security technologies
Phenom II X3 P840 and Celeron 3955U 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 Phenom II X3 P840 and Celeron 3955U 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 Phenom II X3 P840 and Celeron 3955U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600 |
| Maximum memory size | no data | 32 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 34.134 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel HD Graphics 510 |
| Max video memory | no data | 32 GB |
| Quick Sync Video | - | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 900 MHz |
Graphics interfaces
Available interfaces and connections of Phenom II X3 P840 and Celeron 3955U integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Phenom II X3 P840 and Celeron 3955U integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@24Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
| Max resolution over VGA | no data | N/A |
Graphics API support
APIs supported by Phenom II X3 P840 and Celeron 3955U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.4 |
Peripherals
Specifications and connection of peripherals supported by Phenom II X3 P840 and Celeron 3955U.
| PCIe version | no data | 3.0 |
| PCI Express lanes | no data | 12 |
Pros & cons summary
| Performance score | 0.84 | 0.95 |
| Recency | 4 October 2010 | 15 August 2015 |
| Physical cores | 3 | 2 |
| Threads | 3 | 2 |
| Chip lithography | 45 nm | 14 nm |
| Power consumption (TDP) | 25 Watt | 15 Watt |
Phenom II X3 P840 has 50% more physical cores and 50% more threads.
Celeron 3955U, on the other hand, has a 13.1% higher aggregate performance score, an age advantage of 4 years, a 221.4% more advanced lithography process, and 66.7% lower power consumption.
The Celeron 3955U is our recommended choice as it beats the Phenom II X3 P840 in performance tests.
Should you still have questions on choice between Phenom II X3 P840 and Celeron 3955U, ask them in Comments section, and we shall answer.
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