Celeron E1400 vs Pentium D 840
Primary details
Comparing Pentium D 840 and Celeron E1400 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Architecture codename | Smithfield (2005) | Allendale (2006−2009) |
| Release date | May 2005 (19 years ago) | April 2008 (16 years ago) |
| Launch price (MSRP) | no data | $57 |
Detailed specifications
Pentium D 840 and Celeron E1400 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 | 3.2 GHz | 2 GHz |
| Boost clock speed | 3.2 GHz | 2 GHz |
| L1 cache | 28 KB | 64 KB (per core) |
| L2 cache | 2 MB | 512 KB (shared) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 90 nm | 65 nm |
| Die size | 206 mm2 | 77 mm2 |
| Maximum core temperature | 70 °C | 73 °C |
| Number of transistors | 169 million | 105 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 1.2V-1.4V | 0.85V-1.5V |
Compatibility
Information on Pentium D 840 and Celeron E1400 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 | 2 | 1 |
| Socket | PLGA775 | LGA775 |
| Power consumption (TDP) | 130 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium D 840 and Celeron E1400. 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 | - | - |
| PAE | 32 Bit | no data |
| FSB parity | - | - |
Security technologies
Pentium D 840 and Celeron E1400 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium D 840 and Celeron E1400 are enumerated here.
| VT-d | - | - |
| VT-x | - | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium D 840 and Celeron E1400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR1, DDR2, DDR3 |
Pros & cons summary
| Chip lithography | 90 nm | 65 nm |
| Power consumption (TDP) | 130 Watt | 65 Watt |
Celeron E1400 has a 38.5% more advanced lithography process, and 100% lower power consumption.
We couldn't decide between Pentium D 840 and Celeron E1400. We've got no test results to judge.
Should you still have questions on choice between Pentium D 840 and Celeron E1400, ask them in Comments section, and we shall answer.
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