Kodzak

Hi I would like to buy a graphics card "Gigabyte GTX670 OC 4GB GDDR5 256b 2DVI+HDMI+DP PCIe 3.0 GV-N670OC-4GD" and use it to render 3D graphics and some gaming I care for max performance. My current laptop is a little aging and does not have sand or Ivy Bridge technology, so I also planing to change laptop. I have a few questions for you: 1. What will be the difference in performance between sandy bridge and ivy bridge? 2. What adapter should I use PE4H (v3.2 or v2.4), PE4L, and why ? 3. What should be the speed of the i7 CPU for this graphics card? 4. How much % of the graphics card power, I will be able to get with the best configuration compared to PC. If there is anything I need to know please say I will be very grateful for your response.