Celeron 420 vs i7-3940XM
Primary details
Comparing Core i7-3940XM and Celeron 420 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1482 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core i7 | no data |
| Power efficiency | 6.33 | no data |
| Architecture codename | Ivy Bridge (2012−2013) | Conroe-L (2007−2008) |
| Release date | 3 September 2012 (12 years ago) | June 2007 (17 years ago) |
| Launch price (MSRP) | $1,096 | $23 |
Detailed specifications
Core i7-3940XM and Celeron 420 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 | 4 (Quad-Core) | 1 (Single-Core) |
| Threads | 8 | 1 |
| Base clock speed | 3 GHz | 1.6 GHz |
| Boost clock speed | 3.9 GHz | 1.6 GHz |
| Bus rate | 5 GT/s | no data |
| L1 cache | 64K (per core) | 64 KB |
| L2 cache | 256K (per core) | 512 KB |
| L3 cache | 8 MB (shared) | 0 KB |
| Chip lithography | 22 nm | 65 nm |
| Die size | 160 mm2 | 77 mm2 |
| Maximum core temperature | 105 °C | no data |
| Maximum case temperature (TCase) | no data | 60 °C |
| Number of transistors | 1,400 million | 105 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
| VID voltage range | no data | 1V-1.3375V |
Compatibility
Information on Core i7-3940XM and Celeron 420 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 | FCPGA988 | LGA775 |
| Power consumption (TDP) | 55 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-3940XM and Celeron 420. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX | no data |
| AES-NI | + | - |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | + | - |
| My WiFi | + | no data |
| Turbo Boost Technology | 2.0 | - |
| Hyper-Threading Technology | + | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | no data |
| Demand Based Switching | - | - |
| FDI | + | no data |
| Fast Memory Access | + | no data |
| FSB parity | no data | - |
Security technologies
Core i7-3940XM and Celeron 420 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
| Identity Protection | + | - |
| Anti-Theft | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-3940XM and Celeron 420 are enumerated here.
| AMD-V | + | - |
| VT-d | + | - |
| VT-x | + | - |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-3940XM and Celeron 420. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR1, DDR2, DDR3 |
| Maximum memory size | 32 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 25.6 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 4000 | no data |
| Quick Sync Video | + | - |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.35 GHz | no data |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i7-3940XM and Celeron 420 integrated GPUs.
| Number of displays supported | 3 | no data |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| SDVO | + | no data |
| CRT | + | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-3940XM and Celeron 420.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 16 | no data |
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.
Pros & cons summary
| Physical cores | 4 | 1 |
| Threads | 8 | 1 |
| Chip lithography | 22 nm | 65 nm |
| Power consumption (TDP) | 55 Watt | 35 Watt |
i7-3940XM has 300% more physical cores and 700% more threads, and a 195.5% more advanced lithography process.
Celeron 420, on the other hand, has 57.1% lower power consumption.
We couldn't decide between Core i7-3940XM and Celeron 420. We've got no test results to judge.
Be aware that Core i7-3940XM is a notebook processor while Celeron 420 is a desktop one.
Should you still have questions on choice between Core i7-3940XM and Celeron 420, ask them in Comments section, and we shall answer.
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