Intel Core i7-3840QM
The Intel Core i7-3840QM is a fast quad-core processor for laptops based on the Ivy Bridge architecture and successor of the i7-3820QM. Due to Hyperthreading, the four cores can handle up to eight threads in parallel leading to better utilization of the CPU. Each core offers a base speed of 2.8 GHz but can dynamically increase clock rates with Turbo Boost up to 3.6 GHz (for 4 active cores), 3.7 GHz (for 2 active cores) and 3.8 GHz (for 1 active core). Furthermore, the CPU offers 8 MB Last Level 3 Cache.
Ivy Bridge is an enhanced die shrink of the Sandy Bridge architecture with improvements on both GPU and CPU performance. The CPUs are produced in 22nm (versus 32nm Sandy Bridge CPUs) and are the first to introduce 3D transistors for increased energy efficiency when compared to similarly clocked Sandy Bridge processors. Other new features are integrated PCI Express 3.0 and DDR3(L)-1600 support.
The performance of the Core i7-3840QM should be slightly above a similarly clocked Sandy Bridge processor due to slight architectural improvements. Overall, performance should be similar to the Core i7-3920XM.
The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 650 MHz up to 1300 MHz with Turbo Boost, making it one of the faster variants.
As with most quad-core Ivy Bridge models, the Core i7-3840QM is specified at a TDP of 45 Watts including graphics card and memory controller. Therefore, the CPU is well-suited for laptops 15-inches or greater.
|Series||Intel Core i7|
|Series: Core i7 Ivy Bridge|
|Clock Rate||2800 - 3800 MHz|
|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||1400 Million|
|Manufacturing Technology||22 nm|
|Die Size||160 mm2|
|Max. Temperature||105 °C|
|Features||HD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, Virtualization|
|GPU||Intel HD Graphics 4000 (650 - 1300 MHz)|
|64 Bit||64 Bit support|
|Starting Price||$568 U.S.|