Celeron 3955U vs i7-640LM
Aggregate performance score
Core i7-640LM outperforms Celeron 3955U by a minimal 3% based on our aggregate benchmark results.
Primary details
Comparing Core i7-640LM and Celeron 3955U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2510 | 2525 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | Intel Celeron |
| Power efficiency | 3.63 | 5.86 |
| Architecture codename | Arrandale (2010−2011) | Skylake (2015−2016) |
| Release date | 7 January 2010 (14 years ago) | 15 August 2015 (9 years ago) |
| Launch price (MSRP) | $332 | $107 |
Detailed specifications
Core i7-640LM and Celeron 3955U 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 GHz |
| Boost clock speed | 2.93 GHz | 2 GHz |
| Bus type | DMI 1.0 | OPI |
| Bus rate | 1 × 2.5 GT/s | 4 GT/s |
| Multiplier | 16 | 20 |
| L1 cache | 64 KB (per core) | 128 KB |
| L2 cache | 256 KB (per core) | 512 KB |
| L3 cache | 4 MB (shared) | 2 MB |
| Chip lithography | 32 nm | 14 nm |
| Die size | 81+177 mm2 | 98.57 mm2 |
| Maximum core temperature | 105 °C | 100 °C |
| Number of transistors | 382+177 Million | 1750 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Core i7-640LM and Celeron 3955U 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 (Uniprocessor) |
| Socket | BGA1288 | FCBGA1356 |
| Power consumption (TDP) | 25 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-640LM and Celeron 3955U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2 | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | + | + |
| FMA | + | - |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | no data | + |
| Turbo Boost Technology | + | - |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | + |
| Smart Response | no data | + |
| PAE | 36 Bit | no data |
| FDI | + | no data |
| Fast Memory Access | + | no data |
Security technologies
Core i7-640LM and Celeron 3955U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-640LM and Celeron 3955U are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-640LM and Celeron 3955U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-800, DDR3-1066 | DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600 |
| Maximum memory size | 8 GB | 32 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 17.051 GB/s | 34.134 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel HD Graphics for Previous Generation Intel Processors | Intel HD Graphics 510 |
| Max video memory | no data | 32 GB |
| Quick Sync Video | - | + |
| Clear Video | + | no data |
| Clear Video HD | + | + |
| Graphics max frequency | 566 MHz | 900 MHz |
Graphics interfaces
Available interfaces and connections of Core i7-640LM and Celeron 3955U integrated GPUs.
| Number of displays supported | 2 | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Core i7-640LM and Celeron 3955U integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@24Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
| Max resolution over VGA | no data | N/A |
Graphics API support
APIs supported by Core i7-640LM and Celeron 3955U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.4 |
Peripherals
Specifications and connection of peripherals supported by Core i7-640LM and Celeron 3955U.
| PCIe version | 2.0 | 3.0 |
| PCI Express lanes | 16 | 12 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
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.
Pros & cons summary
| Performance score | 0.96 | 0.93 |
| Integrated graphics card | 0.77 | 1.61 |
| Recency | 7 January 2010 | 15 August 2015 |
| Threads | 4 | 2 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 25 Watt | 15 Watt |
i7-640LM has a 3.2% higher aggregate performance score, and 100% more threads.
Celeron 3955U, on the other hand, has 109.1% faster integrated GPU, an age advantage of 5 years, a 128.6% more advanced lithography process, and 66.7% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between Core i7-640LM and Celeron 3955U.
Should you still have questions on choice between Core i7-640LM and Celeron 3955U, ask them in Comments section, and we shall answer.
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