gt 920m 4gb vs gt 840m 2 gb and fifth gen i7 dual core vs fourth gen i7 quad core

I would get the quad with the 840

840, with nVidia cards, the first number is the generation and second/third the model, simply put, they higher the better performing, regardless of ram size.

For example, a 570 can out perform a 920, even though it is older tech.

Get the 2gb 840m.

As I stated in my post, a dual core i7 and the 840m will provide better game performance than a quad core i7 and the 920m due to the difference in the GPU performance.

Ahh... I had it mix around.

The quad core and 840m will definitely give you better performance than the dual core 920m for all games.

There is hardly any difference in performance between 4th and 5th gen CPUs. CPU performance increases since Sandy Bridge (2nd) has been relatively small. Assuming the same clockspeed and number of cores the average performance increase based on numerous benchmarks are as follows

2nd gen - 3rd gen = 6%
3rd gen - 4th gen = 6%
4th gen - 5th gen = 5%

A 2.0GHz 5th gen CPU would be about equal to a 2.36GHz 2nd gen CPU. But compared to a 4th gen CPU it would only be about 2.1GHz.

Looking at the Intel processors the Duo core processors have a U the the product name example 5650U meaning these are processors used ijn Ultra devices where battery life, temperature and power efficiency are the main concern in design and not as much preformance. Now the quad cores are the one yoiu see in tradtional laptop cases not the ultrabooks. Power is more a concern and battery life, temp and effieciency aren't the as much a concern. So typically laptops with these processors get less battery life. Another thing about these the 4th & 5th generation Processors have integrated graphics The 4th generation HQ after the number 4950HQ the q stand for quad and the H for High perfomance graphics the Intel Iris. The MQ stand for Mobile Quad core. Basically in the 4th generation the High performance uses the Intel Iris graphics. The 5th generation MQ isn't used in the name of the processor as only HQ and U are used. So the name of the processor does make a difference also

A 5th generation i7 5950HQ is 200.00 more then the i7-5850HQ.

All these processors have Intel graphics integrated into the processor so the Nvidia is the discrete graphics card that has it own resource like memory

Both are class 2 level graphics cards so i would with mor memory

http/www.notebookcheck.net/Comparison-of-Laptop-Graphics-Cards.130.0.html

http/www.notebookcheck.net/NVIDIA-GeForce-920M.138763.0.html