Atom E640T vs Core i7-2840QM
Primary details
Comparing Core i7-2840QM and Atom E640T processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 1674 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | no data |
| Architecture codename | Sandy Bridge (2011−2013) | Tunnel Creek (2010) |
| Release date | 4 September 2011 (12 years ago) | 14 September 2010 (13 years ago) |
Detailed specifications
Core i7-2840QM and Atom E640T 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 |
| Boost clock speed | 2.4 GHz | 1 GHz |
| Bus support | 4 × 5 GT/s | no data |
| L1 cache | 256 KB | 64 KB (per core) |
| L2 cache | 1 MB | 512 KB (per core) |
| L3 cache | 8 MB | 0 KB |
| Chip lithography | 32 nm | 45 nm |
| Die size | 216 mm2 | 26 mm2 |
| Number of transistors | 1160 Million | 47 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
Compatibility
Information on Core i7-2840QM and Atom E640T 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 |
| Socket | Socket G2 | Intel BGA 676 |
| Power consumption (TDP) | 45 Watt | 3 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-2840QM and Atom E640T. You'll probably need this information if you require some particular technology.
| AES-NI | + | no data |
| FMA | + | no data |
| AVX | + | no data |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Hyper-Threading Technology | no data | + |
Security technologies
Core i7-2840QM and Atom E640T technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-2840QM and Atom E640T are enumerated here.
| VT-d | + | no data |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-2840QM and Atom E640T. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR2 |
| Maximum memory size | 32 GB | no data |
| Maximum memory bandwidth | 25.598 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel HD Graphics 3000 | Intel GMA 600 |
Pros & cons summary
| Recency | 4 September 2011 | 14 September 2010 |
| Physical cores | 4 | 1 |
| Threads | 8 | 2 |
| Chip lithography | 32 nm | 45 nm |
| Power consumption (TDP) | 45 Watt | 3 Watt |
We couldn't decide between Core i7-2840QM and Atom E640T. We've got no test results to judge.
Should you still have questions on choice between Core i7-2840QM and Atom E640T, ask them in Comments section, and we shall answer.
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