Intel Core i7-3940XM

The Intel Core i7-3940XM is the fastest quad-core processor for laptops (at the time of introduction in September 2012) an successor of the i7-3920XM. 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 3.0 GHz but can dynamically increase clock rates with Turbo Boost up to 3.7 GHz (for 4 active cores), 3.8 GHz (for 2 active cores) and 3.9 GHz (for 1 active core). Furthermore, the Extreme CPUs offer an unlocked multiplicator for easy overclocking.

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 i7-3940XM should be slightly above a similarly clocked Sandy Bridge processor due to slight architectural improvements. Because of the higher clock speed, the former champion Core i7-3920XM should be outperformed by about 3%.

The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 650 MHz up to 1350 MHz with Turbo Boost, making it the fastest variant.

The XM CPUs are rated at a TDP of 55 Watts including graphics card and memory controller and therefore 10 Watt higher than the other quad-core models. Therefore, the CPU is well-suited for laptops 17-inches or greater.

Series	Intel Core i7
Codename	Ivy Bridge
Clock Rate	3000 - 3900 MHz
Level 1 Cache	256 KB
Level 2 Cache	1024 KB
Level 3 Cache	8192 KB
Number of Cores / Threads	4 / 8
Max. Power Consumption (TDP = Thermal Design Power)	55 Watt
Transistor Count	1400 Million
Manufacturing Technology	22 nm
Die Size	160 mm2
Max. Temperature	105 °C
Socket	FCPGA988
Features	HD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, Virtualization
64 Bit	64 Bit support
Hardware Virtualization	VT-x, VT-d
Starting Price	$1096 U.S.
Announcement Date	09/30/2012

CPU Benchmarks

3DMark 06 - CPU:

100%

min: 7166 avg: 7181.7 (84.49%) max: 7203 Points

Model	Memory	GPU			Result
Precision M6700	16384 MB	Quadro K5000M	601 / 750MHz	4096MB nvlddmkm 9.18.13.697 (Forceware 306.97) Win7 64	7166
E-Klasse 4 i7 17FHD	32768 MB	Quadro K3000M	654 / 700MHz	2048MB nvlddmkm 9.18.13.697 (Forceware 306.97) Win7 64	7176
M73-2N, Ivy Bridge	8192 MB	HD Graphics 4000			7203

Cinebench R10 in comparison
Intel Atom Z670 (min)	691
...
Intel Core i7 4900MQ	20129.5
Intel Core i7 3840QM	20135
Intel Core i7 4800MQ	20172
Intel Core i7 3940XM	20582
Intel Core i7 4930MX	20818
Intel Core i7 (Desktop) 3770K	22190
Intel Core i7 (Desktop) 990X EE	22268.7
...
Intel Core i7 (Desktop) 3960X (max)	27189.5

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Intel Core i7-3940XM

CPU Benchmarks

Reviews for the Intel Core i7 3940XM processor

Other CPUs of the series Intel Core i7

Surrounding CPUs