#1 - How much can the battery life vary between having these two graphics options, if any?
AMD Radeon™ HD6750M (PowerXpress)
NVIDIA® GeForce® GT 640M Graphics
#2 - Does samsung limit CPU clock speed somehow for heat/battery? Their website lists the i7 3615QM as having a "max clock speed" of 2.3ghz whereas the normal 3615QM is 2.3ghz with a max turbo boost of 3.3ghz
Any other opinions/input on this laptop line is also welcome, thanks
More about :samsung series laptops graphics card clock speed
The Samsung Series 7 is not something I would recommend in most cases, because its display is very poor in quality. Its resolution (1600x900) is good for its size (15.6") but the low contrast of the display gives it an overall grayish look and prevents it from producing a dark black.
Check out the MSI GE60 instead. It's still lightweight for a 15.6-incher (at 5.28 lbs), and it comes with a faster GPU (GT 650M or GTX 660M) and much better display (15.6" 1920x1080 w/ good contrast).