Celeron G1820 vs Pentium D 945
Primary details
Comparing Pentium D 945 and Celeron G1820 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 2407 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 0.12 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | no data | 1.89 |
| Architecture codename | Presler (2005−2007) | Haswell (2013−2015) |
| Release date | 23 July 2006 (18 years ago) | 1 December 2013 (10 years ago) |
| Launch price (MSRP) | $163 | $110 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Pentium D 945 and Celeron G1820 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 | 3.4 GHz | 2.7 GHz |
| Boost clock speed | 3.4 GHz | 2.7 GHz |
| Bus rate | no data | 5 GT/s |
| L1 cache | 16 KB (per core) | 64 KB (per core) |
| L2 cache | 2 MB (per die) | 256 KB (per core) |
| L3 cache | 0 KB | 2 MB |
| Chip lithography | 65 nm | 22 nm |
| Die size | 2x 81 mm2 | 177 mm2 |
| Maximum case temperature (TCase) | 63 °C | 72 °C |
| Number of transistors | 376 million | 1,400 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 1.2V-1.3375V | no data |
Compatibility
Information on Pentium D 945 and Celeron G1820 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 | LGA775,PLGA775 | FCLGA1150 |
| Power consumption (TDP) | 95 Watt | 53 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium D 945 and Celeron G1820. 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 |
| PAE | 32 Bit | no data |
| FSB parity | - | no data |
Security technologies
Pentium D 945 and Celeron G1820 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 Pentium D 945 and Celeron G1820 are enumerated here.
| VT-d | - | - |
| VT-x | - | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium D 945 and Celeron G1820. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | 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 | On certain motherboards (Chipset feature) | 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 Pentium D 945 and Celeron G1820 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 Pentium D 945 and Celeron G1820 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 Pentium D 945 and Celeron G1820 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 Pentium D 945 and Celeron G1820.
| PCIe version | no data | Up to 3.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Recency | 23 July 2006 | 1 December 2013 |
| Chip lithography | 65 nm | 22 nm |
| Power consumption (TDP) | 95 Watt | 53 Watt |
Celeron G1820 has an age advantage of 7 years, a 195.5% more advanced lithography process, and 79.2% lower power consumption.
We couldn't decide between Pentium D 945 and Celeron G1820. We've got no test results to judge.
Should you still have questions on choice between Pentium D 945 and Celeron G1820, 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.
