Celeron B820 vs Core 2 Duo E6400
Aggregate performance score
Celeron B820 outperforms Core 2 Duo E6400 by a minimal 4% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Duo E6400 and Celeron B820 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2850 | 2829 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Celeron |
| Architecture codename | Conroe (2006−2007) | Sandy Bridge (2011−2013) |
| Release date | July 2006 (18 years ago) | 31 July 2011 (13 years ago) |
| Launch price (MSRP) | no data | $86 |
Detailed specifications
Core 2 Duo E6400 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 | 2 (Dual-core) | 2 (Dual-core) |
| Threads | 2 | 2 |
| Base clock speed | 2.13 GHz | 1.7 GHz |
| Boost clock speed | 2.13 GHz | 1.7 GHz |
| Bus type | no data | DMI 2.0 |
| Bus rate | 1066 MHz | 4 × 5 GT/s |
| Multiplier | no data | 17 |
| L1 cache | 64 KB | 128 KB |
| L2 cache | 2 MB | 512 KB |
| L3 cache | 0 KB | 2 MB |
| Chip lithography | 65 nm | 32 nm |
| Die size | 143 mm2 | 131 mm2 |
| Maximum core temperature | 61 °C | 100 °C |
| Number of transistors | 291 million | 504 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 0.85V-1.5V | no data |
Compatibility
Information on Core 2 Duo E6400 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 | 1 | 1 (Uniprocessor) |
| Socket | LGA775,PLGA775 | FCPGA988,PGA988 |
| Power consumption (TDP) | 65 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo E6400 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) | + | + |
| My WiFi | no data | - |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | - |
| FDI | no data | + |
| Fast Memory Access | no data | + |
| FSB parity | - | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core 2 Duo E6400 and Celeron B820 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
| Anti-Theft | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Duo E6400 and Celeron B820 are enumerated here.
| VT-d | no data | - |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E6400 and Celeron B820. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | 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 Core 2 Duo E6400 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 Core 2 Duo E6400 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.
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.
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
| Performance score | 0.50 | 0.52 |
| Chip lithography | 65 nm | 32 nm |
| Power consumption (TDP) | 65 Watt | 35 Watt |
Celeron B820 has a 4% higher aggregate performance score, a 103.1% more advanced lithography process, and 85.7% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between Core 2 Duo E6400 and Celeron B820.
Note that Core 2 Duo E6400 is a desktop processor while Celeron B820 is a notebook one.
Should you still have questions on choice between Core 2 Duo E6400 and Celeron B820, ask them in Comments section, and we shall answer.
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