Celeron N2820 vs Core 2 Quad Q8400
Primary details
Comparing Core 2 Quad Q8400 and Celeron N2820 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2263 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Celeron |
| Power efficiency | 1.30 | no data |
| Architecture codename | Yorkfield (2007−2009) | Bay Trail-M (2013−2014) |
| Release date | 19 April 2009 (15 years ago) | 1 December 2013 (10 years ago) |
| Launch price (MSRP) | no data | $107 |
Detailed specifications
Core 2 Quad Q8400 and Celeron N2820 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 | 4 (Quad-Core) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | 2.66 GHz | 2.13 GHz |
| Boost clock speed | 0.67 GHz | 2.39 GHz |
| Bus rate | 1333 MHz | no data |
| L1 cache | 64 KB (per core) | 56K (per core) |
| L2 cache | 4 MB (shared) | 512K (per core) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 45 nm | 22 nm |
| Die size | 2x 82 mm2 | no data |
| Maximum core temperature | no data | 105 °C |
| Maximum case temperature (TCase) | 71 °C | no data |
| Number of transistors | 456 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q8400 and Celeron N2820 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 |
| Socket | FCLGA775,LGA775 | FCBGA1170 |
| Power consumption (TDP) | 95 Watt | 7.5 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Celeron N2820. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
| Smart Connect | no data | + |
| FSB parity | - | no data |
| RST | no data | - |
Security technologies
Core 2 Quad Q8400 and Celeron N2820 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | + |
| Anti-Theft | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Celeron N2820 are enumerated here.
| VT-d | no data | - |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Celeron N2820. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR3 |
| Maximum memory size | no data | 8 GB |
| Max memory channels | no data | 2 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Intel® HD Graphics for Intel Atom® Processor Z3700 Series |
| Graphics max frequency | no data | 756 MHz |
Graphics interfaces
Available interfaces and connections of Core 2 Quad Q8400 and Celeron N2820 integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Core 2 Quad Q8400 and Celeron N2820.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | no data | 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 | 19 April 2009 | 1 December 2013 |
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Chip lithography | 45 nm | 22 nm |
| Power consumption (TDP) | 95 Watt | 7 Watt |
Core 2 Quad Q8400 has 100% more physical cores and 100% more threads.
Celeron N2820, on the other hand, has an age advantage of 4 years, a 104.5% more advanced lithography process, and 1257.1% lower power consumption.
We couldn't decide between Core 2 Quad Q8400 and Celeron N2820. We've got no test results to judge.
Note that Core 2 Quad Q8400 is a desktop processor while Celeron N2820 is a notebook one.
Should you still have questions on choice between Core 2 Quad Q8400 and Celeron N2820, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
