Atom Z670 vs i7-3940XM
Primary details
Comparing Core i7-3940XM and Atom Z670 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 | Laptop |
| Series | Intel Core i7 | Intel Atom |
| Power efficiency | 6.32 | no data |
| Architecture codename | Ivy Bridge (2012−2013) | Lincroft (2010−2011) |
| Release date | 3 September 2012 (12 years ago) | 11 April 2011 (13 years ago) |
| Launch price (MSRP) | $1,096 | $75 |
Detailed specifications
Core i7-3940XM and Atom Z670 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 | 2 |
| Base clock speed | 3 GHz | 1.5 GHz |
| Boost clock speed | 3.9 GHz | 1.5 GHz |
| Bus type | no data | cDMI |
| Bus rate | 5 GT/s | 400 MT/s |
| Multiplier | no data | 8 |
| L1 cache | 64K (per core) | 56 KB |
| L2 cache | 256K (per core) | 512K (per core) |
| L3 cache | 8 MB (shared) | 0 KB |
| Chip lithography | 22 nm | 45 nm |
| Die size | 160 mm2 | 65 mm2 |
| Maximum core temperature | 105 °C | 90 °C |
| Number of transistors | 1,400 million | 140 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-3940XM and Atom Z670 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 (Uniprocessor) |
| Socket | FCPGA988 | T-PBGA518 |
| Power consumption (TDP) | 55 Watt | 3 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-3940XM and Atom Z670. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® AVX | Intel® SSE2, Intel® SSE3, Intel® SSSE3 |
| AES-NI | + | - |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| My WiFi | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | + | no data |
| Demand Based Switching | - | no data |
| FDI | + | no data |
| Fast Memory Access | + | no data |
Security technologies
Core i7-3940XM and Atom Z670 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | + |
| Identity Protection | + | - |
| Anti-Theft | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-3940XM and Atom Z670 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 Atom Z670. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR2 |
| Maximum memory size | 32 GB | 2.93 GB |
| Max memory channels | 2 | 1 |
| Maximum memory bandwidth | 25.6 GB/s | 3.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 4000 | PowerVR SGX535 |
| 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 Atom Z670 integrated GPUs.
| Number of displays supported | 3 | no data |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| LVDS | no data | + |
| SDVO | + | no data |
| CRT | + | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-3940XM and Atom Z670.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 16 | no data |
| PCI support | 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.
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.
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.
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 | 3 September 2012 | 11 April 2011 |
| Physical cores | 4 | 1 |
| Threads | 8 | 2 |
| Chip lithography | 22 nm | 45 nm |
| Power consumption (TDP) | 55 Watt | 3 Watt |
i7-3940XM has an age advantage of 1 year, 300% more physical cores and 300% more threads, and a 104.5% more advanced lithography process.
Atom Z670, on the other hand, has 1733.3% lower power consumption.
We couldn't decide between Core i7-3940XM and Atom Z670. We've got no test results to judge.
Should you still have questions on choice between Core i7-3940XM and Atom Z670, ask them in Comments section, and we shall answer.
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