Celeron G1820T vs Core 2 Duo P8400
Aggregate performance score
Celeron G1820T outperforms Core 2 Duo P8400 by an impressive 94% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Duo P8400 and Celeron G1820T processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2842 | 2444 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 1.80 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core 2 Duo | no data |
| Power efficiency | 2.01 | 1.81 |
| Architecture codename | Penryn (2008−2011) | Haswell (2013−2015) |
| Release date | 15 July 2008 (16 years ago) | 1 December 2013 (10 years ago) |
| Launch price (MSRP) | $209 | $42 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core 2 Duo P8400 and Celeron G1820T 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 | 2.26 GHz | 2.4 GHz |
| Boost clock speed | 2.26 GHz | 2.4 GHz |
| Bus rate | 1066 MHz | 5 GT/s |
| L1 cache | 128 KB | 64 KB (per core) |
| L2 cache | 3 MB | 256 KB (per core) |
| L3 cache | 3 MB L2 Cache | 3 MB (shared) |
| Chip lithography | 45 nm | 22 nm |
| Die size | 107 mm2 | 177 mm2 |
| Maximum core temperature | 105 °C | no data |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 410 Million | 1,400 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 1.05V-1.15V | no data |
Compatibility
Information on Core 2 Duo P8400 and Celeron G1820T 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 |
| Socket | BGA479,PBGA479,PGA478 | FCLGA1150 |
| Power consumption (TDP) | 25 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo P8400 and Celeron G1820T. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
Security technologies
Core 2 Duo P8400 and Celeron G1820T technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
| Secure Key | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Duo P8400 and Celeron G1820T are enumerated here.
| VT-d | no data | - |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo P8400 and Celeron G1820T. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR3 |
| Maximum memory size | no data | 32 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 21.3 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® HD Graphics for 4th Generation Intel® Processors |
| Max video memory | no data | 1.7 GB |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.05 GHz |
Graphics interfaces
Available interfaces and connections of Core 2 Duo P8400 and Celeron G1820T integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
| VGA | no data | + |
Graphics image quality
Maximum display resolutions supported by Core 2 Duo P8400 and Celeron G1820T integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 1920x1080@60Hz |
| Max resolution over eDP | no data | 2560x1600@60Hz |
| Max resolution over DisplayPort | no data | 2560x1600@60Hz |
| Max resolution over VGA | no data | 1920x1200@60Hz |
Graphics API support
APIs supported by Core 2 Duo P8400 and Celeron G1820T integrated GPUs, sometimes API versions are included.
| DirectX | no data | 11.1/12 |
| OpenGL | no data | 4.3 |
Peripherals
Specifications and connection of peripherals supported by Core 2 Duo P8400 and Celeron G1820T.
| PCIe version | no data | Up to 3.0 |
| 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.
Pros & cons summary
| Performance score | 0.53 | 1.03 |
| Recency | 15 July 2008 | 1 December 2013 |
| Chip lithography | 45 nm | 22 nm |
| Power consumption (TDP) | 25 Watt | 35 Watt |
Core 2 Duo P8400 has 40% lower power consumption.
Celeron G1820T, on the other hand, has a 94.3% higher aggregate performance score, an age advantage of 5 years, and a 104.5% more advanced lithography process.
The Celeron G1820T is our recommended choice as it beats the Core 2 Duo P8400 in performance tests.
Be aware that Core 2 Duo P8400 is a notebook processor while Celeron G1820T is a desktop one.
Should you still have questions on choice between Core 2 Duo P8400 and Celeron G1820T, 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.
