Celeron 3855U vs Core i7-620M
Aggregated performance score
Core i7-620M outperforms Celeron 3855U by an impressive 54% based on our aggregated benchmark results.
Primary details
Comparing Core i7-620M and Celeron 3855U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2173 | 2464 |
| 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) | Skylake (2015−2016) |
| Release date | 7 January 2010 (14 years ago) | 15 August 2015 (8 years ago) |
| Launch price (MSRP) | $332 | $107 |
| Current price | $254 (0.8x MSRP) | $315 (2.9x MSRP) |
Detailed specifications
Core i7-620M and Celeron 3855U 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 | 2.66 GHz | 1.6 GHz |
| Boost clock speed | 3.33 GHz | 1.6 GHz |
| Bus support | 2500 MHz | 4 GT/s |
| L1 cache | 64K (per core) | 128 KB |
| L2 cache | 256K (per core) | 512 KB |
| L3 cache | 4 MB (shared) | 2 MB |
| Chip lithography | 32 nm | 14 nm |
| Die size | 81+114 mm2 | 98.57 mm210.3 mm × 9.57 mm |
| Maximum core temperature | 105 °C | 100 °C |
| Number of transistors | 384 million | 1750 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
Compatibility
Information on Core i7-620M and Celeron 3855U 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 | 1 |
| Socket | BGA1288,PGA988 | FCBGA1356 |
| Power consumption (TDP) | 35 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-620M and Celeron 3855U. 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 | + | no data |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | no data | + |
| Turbo Boost Technology | + | - |
| Hyper-Threading Technology | + | - |
| TSX | no data | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | + |
| SIPP | no data | - |
| Smart Response | no data | + |
| PAE | 36 Bit | no data |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core i7-620M and Celeron 3855U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
| Secure Key | no data | + |
| MPX | no data | - |
| Identity Protection | no data | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-620M and Celeron 3855U are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-620M and Celeron 3855U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4-1866, DDR4-2133, LPDDR3-1600, LPDDR3-1866, DDR3L-1333, DDR3L-1600 |
| Maximum memory size | 8 GB | 32 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 17.1 GB/s | 34.1 GB/s |
| ECC memory support | - | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® HD Graphics for Previous Generation Intel® Processors | Intel HD Graphics 510 |
| Max video memory | no data | 32 GB |
| Quick Sync Video | no data | + |
| Clear Video | + | no data |
| Clear Video HD | + | + |
| Graphics max frequency | 766 MHz | 900 MHz |
Graphics interfaces
Available interfaces and connections of Core i7-620M and Celeron 3855U integrated GPUs.
| Number of displays supported | 2 | 3 |
| eDP | no data | + |
| DisplayPort | no data | + |
| HDMI | no data | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Core i7-620M and Celeron 3855U 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 i7-620M and Celeron 3855U 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 i7-620M and Celeron 3855U.
| PCIe version | 2.0 | 2.0 |
| PCI Express lanes | 16 | 10 |
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.
Core i7-620M outperforms Celeron 3855U by 54% based on our aggregated benchmark results.
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 i7-620M outperforms Celeron 3855U by 54% 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 i7-620M outperforms Celeron 3855U by 42% 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 i7-620M outperforms Celeron 3855U by 54% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 1.28 | 0.83 |
| Recency | 7 January 2010 | 15 August 2015 |
| Threads | 4 | 2 |
| Cost | $332 | $107 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 35 Watt | 15 Watt |
The Core i7-620M is our recommended choice as it beats the Celeron 3855U in performance tests.
Should you still have questions on choice between Core i7-620M and Celeron 3855U, ask them in Comments section, and we shall answer.
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