Atom Z2520 vs Celeron B820
Primary details
Comparing Celeron B820 and Atom Z2520 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2917 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Celeron | no data |
| Power efficiency | 1.36 | no data |
| Architecture codename | Sandy Bridge (2011−2013) | Clovertrail (2013) |
| Release date | 1 July 2012 (12 years ago) | 27 February 2013 (11 years ago) |
| Launch price (MSRP) | $86 | no data |
Detailed specifications
Celeron B820 and Atom Z2520 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 | 4 |
| Base clock speed | 1.7 GHz | 1.2 GHz |
| Boost clock speed | 1.7 GHz | 1.2 GHz |
| Bus type | DMI 2.0 | no data |
| Bus rate | 4 × 5 GT/s | no data |
| Multiplier | 17 | no data |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 256K (per core) | 512 KB (per core) |
| L3 cache | 2 MB (shared) | 0 KB |
| Chip lithography | 32 nm | 32 nm |
| Die size | 131 mm2 | 65 mm2 |
| Maximum core temperature | 100 °C | 90 °C |
| Number of transistors | 504 million | 140 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
Compatibility
Information on Celeron B820 and Atom Z2520 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 |
| Socket | FCPGA988,PGA988 | FC-MB4760 |
| Power consumption (TDP) | 35 Watt | 3 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron B820 and Atom Z2520. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2 | Intel® SSE2, Intel® SSE3, Intel® SSSE3 |
| FMA | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | - | no data |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | no data |
| Demand Based Switching | - | no data |
| PAE | no data | 32 Bit |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Smart Idle | no data | + |
Security technologies
Celeron B820 and Atom Z2520 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | no data |
| Anti-Theft | - | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Celeron B820 and Atom Z2520 are enumerated here.
| VT-d | - | no data |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron B820 and Atom Z2520. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR2 |
| Maximum memory size | 16 GB | 2 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21.335 GB/s | 8.5 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics for 2nd Generation Intel Processors | SGX 544MP2 |
| Graphics max frequency | 1.05 GHz | no data |
Graphics interfaces
Available interfaces and connections of Celeron B820 and Atom Z2520 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 B820 and Atom Z2520.
| PCIe version | 2.0 | no data |
| PCI Express lanes | 16 | no data |
| USB revision | no data | 2.0 OTG, USB-SPH 2.0 |
| Number of USB ports | no data | 2 |
| UART | no data | 3 |
Pros & cons summary
| Recency | 1 July 2012 | 27 February 2013 |
| Threads | 2 | 4 |
| Power consumption (TDP) | 35 Watt | 3 Watt |
Atom Z2520 has an age advantage of 7 months, 100% more threads, and 1066.7% lower power consumption.
We couldn't decide between Celeron B820 and Atom Z2520. We've got no test results to judge.
Should you still have questions on choice between Celeron B820 and Atom Z2520, ask them in Comments section, and we shall answer.
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