Although I do demanding video editing, I am told by most forums that going up to 12GB of RAM is not noticeable for the increase in price, and the same from changing 1600MHz to 2000MHz, can you confirm/deny this?
It really just depends on what degree of editing you'll be doing, you probably don't need 12GB of RAM right now but you probably will in the future. There isn't any really any difference between 1333mhz/1600mhz/2000mhz for gaming and video editing though.
Video editing consists of:
60% Sony Vegas. This means a huge amount of previewing (pre rendering) which I know takes RAM. You set how much RAM you want Vegas to use for pre-rendering.
20% After Effects. Main use of RAM here is having many compositions open simultaneously and rendering for hours on scenes with different types of blurs and effects.
10% 3D Modelling and Rendering. New to 3D, but if I ever want to go in that direction, I might need the extra RAM. I don't entirely know how RAM is used for 3D programs.
10% Rendering. I use high profile rendering programs such as MeGUI for final productions and encoding. I encode 2 pass x264(h.264) for almost everything, and that needs a very fast CPU for better times. How much the amount of RAM I have would make a difference, I don't know.
They all have their individual needs for RAM. I think 6GB is fine for now, but whenever I need to upgrade, I will. And by then 12GB would be cheaper anyway, so it would probably be the best option. I just don't want to bottleneck the computer from stock.
Also, I'm looking at the power usage I will have. PCSpecialist say the PC will generate 758W. Do you know if that is load, idle, or average? I imagine load, but could be wrong