i7-660LM vs i7-840QM
Primary details
Comparing Core i7-840QM and Core i7-660LM processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2310 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | Intel Core i7 |
| Power efficiency | 2.59 | no data |
| Architecture codename | Clarksfield (2009−2010) | Arrandale (2010−2011) |
| Release date | 20 June 2010 (14 years ago) | 13 September 2010 (14 years ago) |
| Launch price (MSRP) | $568 | $346 |
Detailed specifications
Core i7-840QM and Core i7-660LM 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) | 2 (Dual-core) |
| Threads | 8 | 4 |
| Base clock speed | 1.86 GHz | 2.26 GHz |
| Boost clock speed | 3.2 GHz | 3.06 GHz |
| Bus type | DMI 1.0 | DMI 1.0 |
| Bus rate | 2.5 GT/s | 1 × 2.5 GT/s |
| Multiplier | 14 | 17 |
| L1 cache | 64 KB (per core) | 128 KB |
| L2 cache | 256 KB (per core) | 512 KB |
| L3 cache | 8 MB (shared) | 4 MB |
| Chip lithography | 45 nm | 32 nm |
| Die size | 296 mm2 | 81+177 mm2 |
| Maximum core temperature | 100 °C | 105 °C |
| Number of transistors | 774 million | 382+177 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Core i7-840QM and Core i7-660LM 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 (Uniprocessor) | 1 (Uniprocessor) |
| Socket | FCPGA988,PGA988 | BGA1288 |
| Power consumption (TDP) | 45 Watt | 25 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-840QM and Core i7-660LM. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | - | + |
| FMA | - | + |
| vPro | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | + | + |
| Hyper-Threading Technology | + | + |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| PAE | 36 Bit | 36 Bit |
| FDI | no data | + |
| Fast Memory Access | no data | + |
Security technologies
Core i7-840QM and Core i7-660LM technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-840QM and Core i7-660LM are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-840QM and Core i7-660LM. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3-800, DDR3-1066 |
| Maximum memory size | 8 GB | 8 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 21.335 GB/s | 17.051 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | None | Intel® HD Graphics for Previous Generation Intel® Processors |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 566 MHz |
Graphics interfaces
Available interfaces and connections of Core i7-840QM and Core i7-660LM integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Core i7-840QM and Core i7-660LM.
| PCIe version | 2 | 2.0 |
| PCI Express lanes | 16 | 16 |
Pros & cons summary
| Recency | 20 June 2010 | 13 September 2010 |
| Physical cores | 4 | 2 |
| Threads | 8 | 4 |
| Chip lithography | 45 nm | 32 nm |
| Power consumption (TDP) | 45 Watt | 25 Watt |
i7-840QM has 100% more physical cores and 100% more threads.
i7-660LM, on the other hand, has an age advantage of 2 months, a 40.6% more advanced lithography process, and 80% lower power consumption.
We couldn't decide between Core i7-840QM and Core i7-660LM. We've got no test results to judge.
Should you still have questions on choice between Core i7-840QM and Core i7-660LM, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
