Frankly, are you being paid for all your efforts? So much statistics for a mere forum bypasser... Would take an hour just to collect and compile all the info you've amply piled up here...
Video ram usage
If you max up all graphic options in Serious Sam 3 in a mere 1920x1080, you will find yourself in need of up to 3GB vram. Proof in the screens:
Beautiful Skyrim has been a long time in here. Just add the RealVision ENB and some other stuff according to the recommendations on the site: http://skyrim.nexusmods.com/mods/30936
It's going to look even prettier than this benchmark!