Celeron N2840 vs i7-640LM
Primary details
Comparing Core i7-640LM and Celeron N2840 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2480 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | Intel Celeron |
| Power efficiency | 3.65 | no data |
| Architecture codename | Arrandale (2010−2011) | Bay Trail-M (2013−2014) |
| Release date | 7 January 2010 (14 years ago) | 22 May 2014 (10 years ago) |
| Launch price (MSRP) | $332 | no data |
Detailed specifications
Core i7-640LM and Celeron N2840 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 | 2.13 GHz | 2.16 GHz |
| Boost clock speed | 2.93 GHz | 2.58 GHz |
| Bus type | DMI 1.0 | no data |
| Bus rate | 1 × 2.5 GT/s | no data |
| Multiplier | 16 | no data |
| L1 cache | 128 KB | 56K (per core) |
| L2 cache | 512 KB | 512K (per core) |
| L3 cache | 4 MB (shared) | 0 KB |
| Chip lithography | 32 nm | 22 nm |
| Die size | 81+177 mm2 | no data |
| Maximum core temperature | 105 °C | 100 °C |
| Number of transistors | 382+177 Million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Core i7-640LM and Celeron N2840 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) | 1 |
| Socket | BGA1288 | FCBGA1170 |
| Power consumption (TDP) | 25 Watt | 7.5 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-640LM and Celeron N2840. 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 |
| PAE | 36 Bit | no data |
| Smart Connect | no data | + |
| FDI | + | no data |
| Fast Memory Access | + | no data |
Security technologies
Core i7-640LM and Celeron N2840 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | + |
| Secure Key | no data | + |
| Anti-Theft | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-640LM and Celeron N2840 are enumerated here.
| VT-d | + | - |
| VT-x | + | + |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-640LM and Celeron N2840. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-800, DDR3-1066 | DDR3 |
| Maximum memory size | 8 GB | 8 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 17.051 GB/s | 21.32 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® HD Graphics for Previous Generation Intel® Processors | Intel® HD Graphics for Intel Atom® Processor Z3700 Series |
| Quick Sync Video | - | + |
| Clear Video | + | no data |
| Clear Video HD | + | - |
| Graphics max frequency | 566 MHz | 792 MHz |
Graphics interfaces
Available interfaces and connections of Core i7-640LM and Celeron N2840 integrated GPUs.
| Number of displays supported | 2 | 2 |
Peripherals
Specifications and connection of peripherals supported by Core i7-640LM and Celeron N2840.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | 16 | 4 |
| USB revision | no data | 3.0 and 2.0 |
| Total number of SATA ports | no data | 2 |
| Number of USB ports | no data | 5 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
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.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Cinebench 10 32-bit single-core
Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.
Cinebench 10 32-bit multi-core
Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.
3DMark06 CPU
3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.
Cinebench 11.5 64-bit multi-core
Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.
Pros & cons summary
| Recency | 7 January 2010 | 22 May 2014 |
| Threads | 4 | 2 |
| Chip lithography | 32 nm | 22 nm |
| Power consumption (TDP) | 25 Watt | 7 Watt |
i7-640LM has 100% more threads.
Celeron N2840, on the other hand, has an age advantage of 4 years, a 45.5% more advanced lithography process, and 257.1% lower power consumption.
We couldn't decide between Core i7-640LM and Celeron N2840. We've got no test results to judge.
Should you still have questions on choice between Core i7-640LM and Celeron N2840, ask them in Comments section, and we shall answer.
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