Atom Z650 vs i7-940XM
Primary details
Comparing Core i7-940XM and Atom Z650 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2210 | 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 | 2.39 | no data |
| Architecture codename | Clarksfield (2009−2010) | Lincroft (2010−2011) |
| Release date | 20 June 2010 (14 years ago) | 11 April 2011 (13 years ago) |
| Launch price (MSRP) | $1,096 | no data |
Detailed specifications
Core i7-940XM and Atom Z650 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 | 2.13 GHz | 1.2 GHz |
| Boost clock speed | 3.33 GHz | 1.2 GHz |
| Bus type | no data | cDMI |
| Bus rate | 2500 MHz | 400 MT/s |
| Multiplier | no data | 8 |
| L1 cache | 64 KB (per core) | 56 KB |
| L2 cache | 256 KB (per core) | 512 KB (per core) |
| L3 cache | 8 MB (shared) | 0 KB |
| Chip lithography | 45 nm | 45 nm |
| Die size | 296 mm2 | 65 mm2 |
| Maximum core temperature | 100 °C | 90 °C |
| Number of transistors | 774 million | 140 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-940XM and Atom Z650 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,PGA988 | T-PBGA518 |
| Power consumption (TDP) | 55 Watt | 3 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-940XM and Atom Z650. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | Intel® SSE, Intel® SSE2, Intel® SSE3 |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | + | no data |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | - | no data |
| PAE | 36 Bit | no data |
Security technologies
Core i7-940XM and Atom Z650 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-940XM and Atom Z650 are enumerated here.
| VT-d | + | - |
| VT-x | + | - |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-940XM and Atom Z650. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1066, DDR3-1333 | DDR2 |
| Maximum memory size | 8 GB | 2.93 GB |
| Max memory channels | 2 | 1 |
| Maximum memory bandwidth | 21 GB/s | 3.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | None | PowerVR SGX535 |
Graphics interfaces
Available interfaces and connections of Core i7-940XM and Atom Z650 integrated GPUs.
| LVDS | no data | + |
Peripherals
Specifications and connection of peripherals supported by Core i7-940XM and Atom Z650.
| PCIe version | 2 | no data |
| PCI Express lanes | 16 | no data |
| PCI support | no data | - |
Pros & cons summary
| Recency | 20 June 2010 | 11 April 2011 |
| Physical cores | 4 | 1 |
| Threads | 8 | 2 |
| Power consumption (TDP) | 55 Watt | 3 Watt |
i7-940XM has 300% more physical cores and 300% more threads.
Atom Z650, on the other hand, has an age advantage of 9 months, and 1733.3% lower power consumption.
We couldn't decide between Core i7-940XM and Atom Z650. We've got no test results to judge.
Should you still have questions on choice between Core i7-940XM and Atom Z650, ask them in Comments section, and we shall answer.
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