The processor of the MSI GX660 is the i7-740QM at 1.73GHZ, with turbo up to 2.93Ghz. This processor is overclockable on the MSIGX660, so you can force the turbo boost to stay activated. It is also Quad Core, WITH hyperthreading.
The GT 650M alas has DDR3 memory, which makes it vastly inferior to the HD 5870 graphics.
The MSI GX660 is superior to the samsung laptop.