Celeron N2815 vs Core i7-640LM
Primary details
Comparing Core i7-640LM and Celeron N2815 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2392 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | Intel Celeron |
| Architecture codename | Arrandale (2010−2011) | Bay Trail-M (2013−2014) |
| Release date | 4 January 2010 (14 years ago) | 1 December 2013 (10 years ago) |
| Launch price (MSRP) | $332 | $107 |
| Current price | $192 (0.6x MSRP) | $270 (2.5x MSRP) |
Detailed specifications
Core i7-640LM and Celeron N2815 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 | 1.86 GHz |
| Boost clock speed | 2.93 GHz | 2.13 GHz |
| Bus support | 2500 MHz | no data |
| L1 cache | 128 KB | 112 KB |
| L2 cache | 512 KB | 1 MB |
| L3 cache | 4 MB | 1 MB |
| Chip lithography | 32 nm | 22 nm |
| Die size | 81+177 mm2 | no data |
| Maximum core temperature | 105 °C | 105 °C |
| Number of transistors | 382+177 Million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
Compatibility
Information on Core i7-640LM and Celeron N2815 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 | no data |
| 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 N2815. 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 | + | no data |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | + | - |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Thermal Monitoring | + | no data |
| Flex Memory Access | + | no data |
| PAE | 36 Bit | no data |
| Smart Connect | no data | + |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Status | Discontinued | Discontinued |
| RST | no data | - |
Security technologies
Core i7-640LM and Celeron N2815 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | + |
| Identity Protection | no data | - |
| Anti-Theft | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-640LM and Celeron N2815 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 N2815. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-800, DDR3-1066 | DDR3L-1066 |
| Maximum memory size | 8 GB | 8 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 17.1 GB/s | no data |
| ECC memory support | - | no data |
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 |
| Clear Video | + | no data |
| Clear Video HD | + | - |
| Graphics max frequency | 566 MHz | 756 MHz |
Graphics interfaces
Available interfaces and connections of Core i7-640LM and Celeron N2815 integrated GPUs.
| Number of displays supported | 2 | 2 |
Peripherals
Specifications and connection of peripherals supported by Core i7-640LM and Celeron N2815.
| 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.
Benchmark coverage: 68%
Core i7-640LM outperforms Celeron N2815 by 206% in Passmark.
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.
Benchmark coverage: 42%
Core i7-640LM outperforms Celeron N2815 by 147% in GeekBench 5 Single-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.
Benchmark coverage: 42%
Core i7-640LM outperforms Celeron N2815 by 167% in GeekBench 5 Multi-Core.
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.
Benchmark coverage: 20%
Core i7-640LM outperforms Celeron N2815 by 186% in Cinebench 10 32-bit single-core.
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.
Benchmark coverage: 19%
Core i7-640LM outperforms Celeron N2815 by 192% in Cinebench 10 32-bit multi-core.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Benchmark coverage: 18%
Celeron N2815 outperforms Core i7-640LM by 170% in wPrime 32.
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.
Benchmark coverage: 17%
Core i7-640LM outperforms Celeron N2815 by 172% in Cinebench 11.5 64-bit multi-core.
Pros & cons summary
| Recency | 4 January 2010 | 1 December 2013 |
| Threads | 4 | 2 |
| Cost | $332 | $107 |
| Chip lithography | 32 nm | 22 nm |
| Power consumption (TDP) | 25 Watt | 7 Watt |
We couldn't decide between Core i7-640LM and Celeron N2815. We've got no test results to judge.
Should you still have questions on choice between Core i7-640LM and Celeron N2815, 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.
