Celeron B820 vs M 585
Primary details
Comparing Celeron M 585 and Celeron B820 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 2873 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Celeron M | Intel Celeron |
| Power efficiency | no data | 1.35 |
| Architecture codename | Merom (2006−2008) | Sandy Bridge (2011−2013) |
| Release date | 20 August 2008 (16 years ago) | 1 July 2012 (12 years ago) |
| Launch price (MSRP) | $70 | $86 |
Detailed specifications
Celeron M 585 and Celeron B820 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 | 1 (Single-Core) | 2 (Dual-core) |
| Threads | 1 | 2 |
| Base clock speed | no data | 1.7 GHz |
| Boost clock speed | 2.16 GHz | 1.7 GHz |
| Bus type | no data | DMI 2.0 |
| Bus rate | 667 MHz | 4 × 5 GT/s |
| Multiplier | no data | 17 |
| L1 cache | no data | 128 KB |
| L2 cache | 1 MB | 512 KB |
| L3 cache | no data | 2 MB (shared) |
| Chip lithography | 65 nm | 32 nm |
| Die size | 143 mm2 | 131 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Number of transistors | 291 Million | 504 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Celeron M 585 and Celeron B820 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 | PPGA478 | FCPGA988,PGA988 |
| Power consumption (TDP) | 31 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Celeron M 585 and Celeron B820. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| FMA | - | + |
| 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 | + |
| Demand Based Switching | no data | - |
| FDI | no data | + |
| Fast Memory Access | no data | + |
Security technologies
Celeron M 585 and Celeron B820 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 M 585 and Celeron B820 are enumerated here.
| VT-d | no data | - |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Celeron M 585 and Celeron B820. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR3 |
| Maximum memory size | no data | 16 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 21.335 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® HD Graphics for 2nd Generation Intel® Processors |
| Graphics max frequency | no data | 1.05 GHz |
Graphics interfaces
Available interfaces and connections of Celeron M 585 and Celeron B820 integrated GPUs.
| Number of displays supported | no data | 2 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| SDVO | no data | + |
| CRT | no data | + |
Peripherals
Specifications and connection of peripherals supported by Celeron M 585 and Celeron B820.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 16 |
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.
Pros & cons summary
| Recency | 20 August 2008 | 1 July 2012 |
| Physical cores | 1 | 2 |
| Threads | 1 | 2 |
| Chip lithography | 65 nm | 32 nm |
| Power consumption (TDP) | 31 Watt | 35 Watt |
Celeron M 585 has 12.9% lower power consumption.
Celeron B820, on the other hand, has an age advantage of 3 years, 100% more physical cores and 100% more threads, and a 103.1% more advanced lithography process.
We couldn't decide between Celeron M 585 and Celeron B820. We've got no test results to judge.
Should you still have questions on choice between Celeron M 585 and Celeron B820, ask them in Comments section, and we shall answer.
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