Pentium D 840 vs i5-520M
Primary details
Comparing Core i5-520M and Pentium D 840 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2405 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core i5 | no data |
| Power efficiency | 2.92 | no data |
| Architecture codename | Arrandale (2010−2011) | Smithfield (2005) |
| Release date | 7 January 2010 (14 years ago) | May 2005 (19 years ago) |
| Launch price (MSRP) | $225 | no data |
Detailed specifications
Core i5-520M and Pentium D 840 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 | 4 | 2 |
| Base clock speed | 2.4 GHz | 3.2 GHz |
| Boost clock speed | 2.93 GHz | 3.2 GHz |
| Bus type | DMI 1.0 | no data |
| Bus rate | 1 × 2.5 GT/s | no data |
| Multiplier | 18 | no data |
| L1 cache | 128 KB | 28 KB |
| L2 cache | 512 KB | 2 MB |
| L3 cache | 3 MB | 0 KB |
| Chip lithography | 32 nm | 90 nm |
| Die size | 81+114 mm2 | 206 mm2 |
| Maximum core temperature | 105 °C | 70 °C |
| Number of transistors | 382+177 Million | 169 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 1.2V-1.4V |
Compatibility
Information on Core i5-520M and Pentium D 840 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 (Uniprocessor) | 2 |
| Socket | BGA1288,PGA988 | PLGA775 |
| Power consumption (TDP) | 35 Watt | 130 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-520M and Pentium D 840. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2 | no data |
| AES-NI | + | - |
| FMA | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | + | - |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| Demand Based Switching | no data | - |
| PAE | 36 Bit | 32 Bit |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| FSB parity | no data | - |
Security technologies
Core i5-520M and Pentium D 840 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i5-520M and Pentium D 840 are enumerated here.
| VT-d | + | - |
| VT-x | + | - |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i5-520M and Pentium D 840. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-800, DDR3-1066 | DDR1, DDR2, DDR3 |
| Maximum memory size | 8.3 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 17.051 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics for Previous Generation Intel Processors | no data |
| Clear Video | + | no data |
| Clear Video HD | + | no data |
| Graphics max frequency | 766 MHz | no data |
Graphics interfaces
Available interfaces and connections of Core i5-520M and Pentium D 840 integrated GPUs.
| Number of displays supported | 2 | no data |
Peripherals
Specifications and connection of peripherals supported by Core i5-520M and Pentium D 840.
| PCIe version | 2.0 | no data |
| PCI Express lanes | 16 | no data |
Pros & cons summary
| Threads | 4 | 2 |
| Chip lithography | 32 nm | 90 nm |
| Power consumption (TDP) | 35 Watt | 130 Watt |
i5-520M has 100% more threads, a 181.3% more advanced lithography process, and 271.4% lower power consumption.
We couldn't decide between Core i5-520M and Pentium D 840. We've got no test results to judge.
Be aware that Core i5-520M is a notebook processor while Pentium D 840 is a desktop one.
Should you still have questions on choice between Core i5-520M and Pentium D 840, ask them in Comments section, and we shall answer.
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