Atom Z550 vs i7-940XM
Aggregate performance score
Core i7-940XM outperforms Atom Z550 by a whopping 829% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2518 | 3624 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.02 | no data |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | Intel Atom |
| Power efficiency | 1.00 | 2.95 |
| Designer | Intel | Intel |
| Manufacturer | Intel | Intel |
| Architecture codename | Clarksfield (2009−2010) | Silverthorne (2008−2010) |
| Release date | 20 June 2010 (15 years ago) | 8 April 2009 (17 years ago) |
| Launch price (MSRP) | $1,096 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Basic parameters of Core i7-940XM and Atom Z550: 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 | 2 GHz |
| Boost clock speed | 3.33 GHz | 0.1 GHz |
| Bus type | no data | FSB |
| Bus rate | 2500 MHz | 533.33 MT/s |
| Multiplier | no data | 15 |
| L1 cache | 64 KB (per core) | 56 KB (per core) |
| 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 | 24.18 mm2 |
| Maximum core temperature | 100 °C | 90 °C |
| Number of transistors | 774 million | 47 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-940XM and Atom Z550 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 | PBGA441 |
| Power consumption (TDP) | 55 Watt | 2.4 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-940XM and Atom Z550. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | + | - |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | - | + |
| PAE | 36 Bit | no data |
| FSB parity | no data | - |
Security technologies
Core i7-940XM and Atom Z550 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-940XM and Atom Z550 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 Z550. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1066, DDR3-1333 | unknown |
| Maximum memory size | 8 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 21 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | None | On certain motherboards (Chipset feature) |
Peripherals
Specifications and connection of peripherals supported by Core i7-940XM and Atom Z550.
| PCIe version | 2 | no data |
| PCI Express lanes | 16 | no data |
Synthetic benchmarks
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.
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. Other than that, Passmark measures multi-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.
Pros & cons summary
| Performance score | 1.30 | 0.14 |
| Recency | 20 June 2010 | 8 April 2009 |
| Physical cores | 4 | 1 |
| Threads | 8 | 2 |
| Power consumption (TDP) | 55 Watt | 2 Watt |
i7-940XM has a 829% higher aggregate performance score, an age advantage of 1 year, and 300% more physical cores and 300% more threads.
Atom Z550, on the other hand, has 2650% lower power consumption.
The Intel Core i7-940XM is our recommended choice as it beats the Intel Atom Z550 in performance tests.
Other comparisons
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