The Intel Core i7 840QM is a high end quad core CPU in 2010. It features 4 cores (quad core CPU) and Hyperthreading. Therefore, 8 threads can be worked on simultaneously.
Because of the Turbo Mode, the CPU is clocked with up to 3.2 GHz (if only one core is used, 2.93 for two cores, and 2 ghz with 4 cores) and therefore can perform very well in single core applications like older games.
The Core i7 line has an integrated memory controller for DDR3 bars (1066 or 1333) supporting a maximum of 8 GB. Therefore, the memory performance is very good (compared to older CPUs with external memory controllers). Still, this also leads to the higher TDP of the whole chip. ECC memory is not supported by the 840QM.
The Core micro-architecture is still very similar to the one used in the Core 2 CPUs, therefore the performance per MHz (neglecting the integrated memory controller, hyperthreading and Turbo Boost) is similar.
The power consumption of up to 45 Watt (TDP) is quite high for a laptop CPU and because of the Turbo Mode, the power consumption should reach these high values. Therefore, the CPU is only suited for large laptops.
| Codename | Clarksfield | ||||||||||||||||||||||||
| Series | Intel Core i7 | ||||||||||||||||||||||||
Series: Core i7 Clarksfield
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| Clock Rate | 1860 - 3200 MHz | ||||||||||||||||||||||||
| Front Side Bus | 2500 | ||||||||||||||||||||||||
| Level 1 Cache | 256 KB | ||||||||||||||||||||||||
| Level 2 Cache | 1 MB | ||||||||||||||||||||||||
| Level 3 Cache | 8 MB | ||||||||||||||||||||||||
| Number of Cores / Threads | 4 / 8 | ||||||||||||||||||||||||
| Power Consumption (TDP = Thermal Design Power) | 45 Watt | ||||||||||||||||||||||||
| Transistor Count | 774 Million | ||||||||||||||||||||||||
| Manufacturing Technology | 45 nm | ||||||||||||||||||||||||
| Die Size | 296 mm2 | ||||||||||||||||||||||||
| Max. Temperature | 100 °C | ||||||||||||||||||||||||
| Socket | RPGA989 | ||||||||||||||||||||||||
| Features | integrated DDR3-1066/1333 dual-channel memory controller, Turbo Boost, Hyper Threading, Virtualization Technology VT-x / VT-d, Trusted Execution Technology, Intel 64, Idel States, Enhanced Speedstep, Thermal Monitoring, Execute Disable Bit | ||||||||||||||||||||||||
| 64 Bit | 64 Bit support | ||||||||||||||||||||||||
| Architecture | x86 | ||||||||||||||||||||||||
| Starting Price | $568 U.S. | ||||||||||||||||||||||||
| Announcement Date | 06/01/2010 | ||||||||||||||||||||||||
| Product Link (external) | ark.intel.com | ||||||||||||||||||||||||
- Average benchmark values
HP EliteBook 8740w-WD943EA: NVIDIA Quadro FX 3800M, 17.00", 3.6 kg
External Review » HP EliteBook 8740w-WD943EA
Dell XPS 15 FHD: NVIDIA GeForce GT 435M, 15.60", 2.9 kg
External Review » Dell XPS 15 FHD
Dell XPS 17: NVIDIA GeForce GT 445M, 17.30", 3.6 kg
External Review » Dell XPS 17
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