Skyrim fps dropping and laggin?

Travis2544

Honorable
Sep 28, 2014
68
0
10,630
Specs:
I5 4690k
Asus z97-a mobo
Asus strix gtx 970 4gb
Corsair 2x4 ram 1300mhz
Sshd 1 tb
Corsair 750m

So i was geting 60-70 fps constant added 40 mods still runs great sometimes drops to 50 fps. Added 3 more visual mods and now it runs at 30-40 fps and sometimes drops to 1. Also at night its crazy dark now??

Downloaded shadowstream and that made my gpu optimize best graphics for skyrim and made it super blurry now so after some messing around got it to look fine again had to put picture to 1920x1080 but its still super dark at night, also uninstalled some of the visual mods like the lush grass and trees. Now its clear again and runs around 50-60 agian.

Do i just have to many mods for my system or should i upgrade my ram or whats going on? Any helps would be great im a total noob with computers, this was my first build.