Intel Core i7 840QM vs 720QM |
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CPUBoss Review Our evaluation of 840QM vs 720QM among laptop CPUs (over 15W)
Performance | |
Benchmark performance using all cores | |
| PCMark 8 Home 3.0 Accelerated, PassMark and 1 more | |
Single-core Performance | |
Individual core benchmark performance | |
| PassMark (Single Core), Geekbench 3 Single Core and 1 more | |
Integrated Graphics | |
Integrated GPU performance for graphics | |
| Sky Diver and Cloud Gate | |
Integrated Graphics (OpenCL) | |
Integrated GPU performance for parallel computing | |
| CompuBench 1.5 Bitcoin mining and 4 more | |
Performance per Watt | |
How efficiently does the processor use electricity? | |
| Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more | |
Value | |
Are you paying a premium for performance? | |
| Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more | |
No winner declared
Too close to call
Cast your vote Do you agree or disagree with CPUBoss?
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Differences What are the advantages of each
| |||||||
| CPUBoss is not aware of any important advantages of the 840QM vs the 720QM. | |||||||
| |||||||
| CPUBoss is not aware of any important advantages of the 720QM vs the 840QM. | |||||||
Report a correction
Benchmarks Real world tests of Core i7 840QM vs 720QM
GeekBench 3 (Multi-core) Data courtesy Primate Labs
GeekBench 3 (Single core) Data courtesy Primate Labs
GeekBench 3 (AES single core) Data courtesy Primate Labs
GeekBench (32-bit) Data courtesy Primate Labs
GeekBench (64-bit) Data courtesy Primate Labs
GeekBench
PassMark Data courtesy Passmark
PassMark (Single Core)
Specifications Full list of technical specs
summary | Core i7 840QM | vs | 720QM |
|---|---|---|---|
| Clock speed | 1.86 GHz | 1.6 GHz | |
| Turbo clock speed | 3.2 GHz | 2.8 GHz | |
| Cores | Quad core | Quad core | |
| Socket type | |||
| rPGA 988A | |||
| Is unlocked | No | No | |
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | Yes | Yes | |
| Has virtualization support | Yes | Yes | |
| Instruction set extensions | |||
| SSE2 | |||
| MMX | |||
| SSE4 | |||
| SSE3 | |||
| SSE | |||
| SSE4.1 | |||
| SSE4.2 | |||
| Supplemental SSE3 | |||
| Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
| TDP | 45W | 45W | |
| Annual home energy cost | 10.84 $/year | 10.84 $/year | |
| Performance per watt | 3.37 pt/W | 2.85 pt/W | |
| Typical power consumption | 36.56W | 36.56W | |
bus | |||
| Architecture | DMI | DMI | |
| Number of links | 1 | 1 | |
| Transfer rate | 2,500 MT/s | 2,500 MT/s | |
details | Core i7 840QM | vs | 720QM |
|---|---|---|---|
| Architecture | x86-64 | x86-64 | |
| Threads | 8 | 8 | |
| L2 cache | 1 MB | 1 MB | |
| L2 cache per core | 0.25 MB/core | 0.25 MB/core | |
| L3 cache | 8 MB | 6 MB | |
| L3 cache per core | 2 MB/core | 1.5 MB/core | |
| Manufacture process | 45 nm | 45 nm | |
| Transistor count | 774,000,000 | 774,000,000 | |
| Max CPUs | 1 | 1 | |
| Clock multiplier | 14 | 12 | |
overclocking | |||
| Overclocked clock speed | 3.06 GHz | 2.52 GHz | |
| Overclocked clock speed (Water) | 1.87 GHz | 1.6 GHz | |
| Overclocked clock speed (Air) | 3.06 GHz | 2.52 GHz | |
integrated graphics | |||
| GPU | None | None | |
| Label | N/A | N/A | |
| Latest DirectX | N/A | N/A | |
| Number of displays supported | N/A | N/A | |
| GPU clock speed | N/A | N/A | |
| Turbo clock speed | N/A | N/A | |
| 3DMark06 | N/A | N/A | |
memory controller | |||
| Memory controller | Built-in | Built-in | |
| Memory type | |||
| DDR3-1333 | |||
| DDR3-1066 | |||
| DDR3 | |||
| Channels | Dual Channel | Dual Channel | |
| Supports ECC | No | No | |
| Maximum bandwidth | 21,333.32 MB/s | 21,333.32 MB/s | |
| Maximum memory size | 8,192 MB | 8,192 MB | |
 Intel Core i7 840QM  Report a correction |  Intel Core i7 720QM Report a correction |
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