Celeron N2815 vs B840
Primary details
Comparing Celeron B840 and Celeron N2815 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2719 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Celeron | Intel Celeron |
| Architecture codename | Sandy Bridge (2011−2013) | Bay Trail-M (2013−2014) |
| Release date | 15 March 2011 (13 years ago) | 1 December 2013 (10 years ago) |
| Launch price (MSRP) | $86 | $107 |
Detailed specifications
Celeron B840 and Celeron N2815 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 | 1.9 GHz | 1.86 GHz |
| Boost clock speed | 1.9 GHz | 2.13 GHz |
| Bus type | DMI 2.0 | no data |
| Bus rate | 4 × 5 GT/s | no data |
| Multiplier | 19 | no data |
| L1 cache | 128 KB | 112 KB |
| L2 cache | 512 KB | 1 MB |
| L3 cache | 2 MB | 1 MB |
| Chip lithography | 32 nm | 22 nm |
| Die size | 131 mm2 | no data |
| Maximum core temperature | 100 °C | 105 °C |
| Number of transistors | 504 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Celeron B840 and Celeron N2815 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 | FCPGA988,PGA988 | FCBGA1170 |
| Power consumption (TDP) | 35 Watt | 7.5 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron B840 and Celeron N2815. You'll probably need this information if you require some particular technology.
| FMA | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | + | no data |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| Demand Based Switching | - | no data |
| Smart Connect | no data | + |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Status | Discontinued | Discontinued |
| RST | no data | - |
Security technologies
Celeron B840 and Celeron N2815 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | + |
| Anti-Theft | - | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Celeron B840 and Celeron N2815 are enumerated here.
| VT-d | - | - |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron B840 and Celeron N2815. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3L-1066 |
| Maximum memory size | 16 GB | 8 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21.335 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® HD Graphics for 2nd Generation Intel® Processors | Intel® HD Graphics for Intel Atom® Processor Z3700 Series |
| Clear Video HD | - | - |
| Graphics max frequency | 1 GHz | 756 MHz |
| InTru 3D | - | - |
Graphics interfaces
Available interfaces and connections of Celeron B840 and Celeron N2815 integrated GPUs.
| Number of displays supported | 2 | 2 |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| SDVO | + | no data |
| CRT | + | no data |
Peripherals
Specifications and connection of peripherals supported by Celeron B840 and Celeron N2815.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | 16 | 4 |
| USB revision | no data | 3.0 and 2.0 |
| Total number of SATA ports | no data | 2 |
| Number of USB ports | no data | 5 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
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
| Recency | 15 March 2011 | 1 December 2013 |
| Chip lithography | 32 nm | 22 nm |
| Power consumption (TDP) | 35 Watt | 7 Watt |
Celeron N2815 has an age advantage of 2 years, a 45.5% more advanced lithography process, and 400% lower power consumption.
We couldn't decide between Celeron B840 and Celeron N2815. We've got no test results to judge.
Should you still have questions on choice between Celeron B840 and Celeron N2815, ask them in Comments section, and we shall answer.
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