I'm building a PC for the first time and I'm not sure which ram to get. I'm building a higher end build with a 3770k CPU light overclocking might be done. But I'm uneducated about memory and I have some basic questions. If I'm getting 16GB is 4 channel the best option? (4x4GB sticks) and what MHz do I need? And what is the difference between dram and VRAM or other types of memory?