Pentium D 840: specs and benchmarks
Summary
Intel started Pentium D 840 sales on May 2005. Based on a Smithfield architecture, this desktop processor is primarily aimed at home systems. It has 2 cores and 2 threads, and is based on 90 nm manufacturing technology, with a maximum frequency of 3200 MHz and a locked multiplier.
Compatibility-wise, this is PLGA775 processor with a TDP of 130 Watt. It supports DDR1, DDR2, DDR3 memory.
Primary details
Pentium D 840 processor market type (desktop or notebook), architecture, sales start time and pricing.
| Place in the ranking | not rated | |
| Place by popularity | not in top-100 | |
| Market segment | Desktop processor | |
| Architecture codename | Smithfield (2005) | |
| Release date | May 2005 (19 years ago) |
Detailed specifications
Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.
| Physical cores | 2 (Dual-core) | |
| Threads | 2 | |
| Base clock speed | 3.2 GHz | of 4.7 GHz (FX-9590) |
| Boost clock speed | 3.2 GHz | of 6.2 GHz (Core i9-14900KS) |
| L1 cache | 28 KB | of 80 KB (EPYC 9965) |
| L2 cache | 2 MB | of 2 MB (Xeon 6980P) |
| L3 cache | 0 KB | of 1152 MB (EPYC 9684X) |
| Chip lithography | 90 nm | of 3 nm (Apple M3 Max 16-Core) |
| Die size | 206 mm2 | |
| Maximum core temperature | 70 °C | of 110 °C (Atom x7-E3950) |
| Number of transistors | 169 million | of 135,240 million (EPYC 9684X) |
| 64 bit support | + | |
| Windows 11 compatibility | - | |
| VID voltage range | 1.2V-1.4V |
Compatibility
Information on Pentium D 840 compatibility with other computer components and devices: 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 | of 8 (Opteron 842) |
| Socket | PLGA775 | |
| Power consumption (TDP) | 130 Watt | of 500 Watt (Xeon 6960P) |
Technologies and extensions
Technological capabilities and additional instructions supported by Pentium D 840. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | |
| Turbo Boost Technology | - | |
| Hyper-Threading Technology | - | |
| Idle States | + | |
| Demand Based Switching | - | |
| PAE | 32 Bit | |
| FSB parity | - |
Security technologies
Processor technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | |
| EDB | + |
Virtualization technologies
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
| VT-d | - | |
| VT-x | - |
Memory specs
Types, maximum amount and channel number of RAM supported by Pentium D 840's memory controller. Depending on the motherboard, higher memory frequency may be supported.
| Supported memory types | DDR1, DDR2, DDR3 |
Similar processors
Here is our recommendation of several processors that are more or less close in performance to the one reviewed.
Recommended GPUs
People consider these graphics cards to be good for Pentium D 840, according to our PC configuration statistics.
These are the fastest graphics cards for Pentium D 840 in our user configuration statistics. There is a total of 7 configurations using Pentium D 840 in our database.
