Rise of Tomb Raider with gtx 970 SLI and very high texture settings stutters really bad

Hello,Iam currently playing the game on 1080p resolution with SMAA and everything cranked up to the max, however the graphic setting that seems to be causing these incredibly annoying stutters during gameplay and in all of the cutscenes too is the texture setting. Whenever I turned it down from very high to high, the stuttering disappears and Iam getting around 55-60 fps in open areas, such as the soviet installation and so on, indoor areas are usually over 100 frames so it's fine. But when I turned it back up to the very high texture settings, not only the framerate dips down by almost 15 or 20 fps, but the gameplay is so incredibly stuttery and unsmooth that it's impossible to enjoy.I also noticed that when Iam using the high textures, the VRAM usage is a little bit above 3GB, usually at 3010-3012 MB, but when I crank the texture settings to very high it goes well above 4GB to almost 4100 and more GB. It's incredibly weird, because Iam running the game on 1080p and not 1440p or higher resolution.I don't think it's convenient from the game to use more than 4GB of Vram at 1080p even though the texture settings are set to very high. When I read this graphical and performance guide by nvidia http://www.geforce.com/whats-new/guides/rise-of-the-tomb-raider-graphics-and-performance-guide#rise-of-the-tomb-raider-texture-quality , I might add they do an excellent job at providing more than enough info, these guides are always quality I noticed in the comparison screenshots between very high and high texture settings a few minor differences in textures on Laras body and few other different little details on rocks and foliage.So this is directly forwarded to the extremely talented bunch at Nixxes who made this PC version of the Rise of Tomb Raider, can you please optimize the texture settings aswell please?Thank you very much