After playing Skyrim for a while, I decided to try adding on some mods. I started with 4: Unnofficial Skyrim Patch, SkyUI, Better Maps with Roads, and Realistic Lighting with customization. Since some of these mods require SKSE, I was sure to get that as well. I installed these mods using NMM. Afterwords, when playing I noticed some weird graphics glitches in the game. It's kind of hard to explain, so I added some screenshots. Basically, sometimes textures show up when their not supposed to, there's wavy people and floating heads, and Lydia's skin disappears. Any idea what's wrong?

http://postimage.org/image/3ysc81rbh/
http://postimage.org/image/4ezrp50mj/

Also, another thing is occasionally, I will now have huge framerate drops (2 sec / frame) for about 8 seconds, then my monitor will go black for a few seconds, then everything will go back to normal. Unfortunately, as I was writing this, by monitor went black for a moment (the game's not running), then came back with a report saying my graphics card failed, then recovered... I'll see if there's a driver update for my graphics card. That might be the problem, but I'm not sure.

EDIT - my graphics driver is up to date, so it's failing for another reason.

did you disable the mods individually to see which one is causing it?

I think it may be Realistic Lighting. It's hard to tell though, since the glitches are so random and occasional. Sometimes, a glitch will happen, other times it won't. Makes it hard to say which mod is actually responsible.

Then play without Realistic Lighting for a while and see if it pops up again.

Looks like you're running low on RAM or vRAM

things like that used to pop up in my game during launch because there was no 4gb patch or LAA aware support, whats your computers ram?

I have a problem like this but I didnt use mods, suddenly I have this shadow on the land, like a bad graphic shadows of the trees and I cant see underwater at all, what can I do??