Celeron B815 vs 2981U
Aggregate performance score
Celeron 2981U outperforms Celeron B815 by a considerable 41% based on our aggregate benchmark results.
Primary details
Comparing Celeron 2981U and Celeron B815 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2764 | 2940 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Celeron | Intel Celeron |
| Power efficiency | 4.12 | 1.25 |
| Architecture codename | Haswell (2013−2015) | Sandy Bridge (2011−2013) |
| Release date | 1 January 2014 (11 years ago) | 1 January 2012 (13 years ago) |
| Launch price (MSRP) | no data | $86 |
Detailed specifications
Celeron 2981U and Celeron B815 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 | 2 (Dual-core) | 2 (Dual-core) |
| Threads | 2 | 2 |
| Base clock speed | 1.6 GHz | 1.6 GHz |
| Boost clock speed | 1.6 GHz | 1.6 GHz |
| Bus type | no data | DMI 2.0 |
| Bus rate | 5 GT/s | 4 × 5 GT/s |
| Multiplier | no data | 16 |
| L1 cache | 128 KB | 64K (per core) |
| L2 cache | 512 KB | 256K (per core) |
| L3 cache | 2 MB | 2 MB (shared) |
| Chip lithography | 22 nm | 32 nm |
| Die size | no data | 131 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Number of transistors | no data | 504 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Celeron 2981U and Celeron B815 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 | 1 (Uniprocessor) |
| Socket | FCBGA1168 | FCPGA988,PGA988 |
| Power consumption (TDP) | 15 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron 2981U and Celeron B815. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2 | Intel® SSE4.1, Intel® SSE4.2 |
| FMA | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | no data | - |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Smart Response | - | no data |
| Demand Based Switching | no data | - |
| GPIO | + | no data |
| Smart Connect | + | no data |
| FDI | - | + |
| Fast Memory Access | no data | + |
| AMT | 9.5 | no data |
| Matrix Storage | - | no data |
| HD Audio | + | no data |
| RST | + | no data |
Security technologies
Celeron 2981U and Celeron B815 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Secure Key | + | no data |
| OS Guard | - | no data |
| Anti-Theft | - | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Celeron 2981U and Celeron B815 are enumerated here.
| AMD-V | + | - |
| VT-d | - | - |
| VT-x | + | + |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron 2981U and Celeron B815. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | 16 GB | 16 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 25.6 GB/s | 21.335 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics for 4th Generation Intel Processors | Intel HD Graphics for 2nd Generation Intel Processors |
| Quick Sync Video | + | - |
| Clear Video | + | no data |
| Graphics max frequency | 1 GHz | 1.05 GHz |
Graphics interfaces
Available interfaces and connections of Celeron 2981U and Celeron B815 integrated GPUs.
| Number of displays supported | 3 | 2 |
| eDP | + | + |
| DisplayPort | + | + |
| HDMI | + | + |
| SDVO | no data | + |
| CRT | no data | + |
Peripherals
Specifications and connection of peripherals supported by Celeron 2981U and Celeron B815.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | 12 | 16 |
| PCI support | - | no data |
| USB revision | 3.0 | no data |
| Total number of SATA ports | 2 | no data |
| Max number of SATA 6 Gb/s Ports | 2 | no data |
| Integrated IDE | - | no data |
| Number of USB ports | 4 | no data |
| Integrated LAN | - | no data |
| UART | + | no data |
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.
Pros & cons summary
| Performance score | 0.65 | 0.46 |
| Recency | 1 January 2014 | 1 January 2012 |
| Chip lithography | 22 nm | 32 nm |
| Power consumption (TDP) | 15 Watt | 35 Watt |
Celeron 2981U has a 41.3% higher aggregate performance score, an age advantage of 2 years, a 45.5% more advanced lithography process, and 133.3% lower power consumption.
The Celeron 2981U is our recommended choice as it beats the Celeron B815 in performance tests.
Should you still have questions on choice between Celeron 2981U and Celeron B815, ask them in Comments section, and we shall answer.
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