GTA V Performance: Visual-Mods and KeepCalm

The last time I played LSPDFR was back in late September. Some days ago, I decided to update and reinstall everything.
This means, I am on the newest RPH, Game patch, VisualV, RadianceV and so on. If needed, system specs: Intel i5 4430 @3.0 Ghz, Radeon HD 7870 Ghz Edition, 16 GB RAM.

As i got into the game first, the lights actually had way more reflections and stuff than I remembered them to have. Also, it felt like I had less FPS. I decided to reinstall my older version of VisualV and RadianceV 1.6 because the game was running fine. But this actually didnt change anything. The lights are still off normal. I could go 2 blocks away from my car and still see the walls of buildings flashing in bright red/blue.

How can I reduce these extreme lighting effects? VisualV and RadianceV dont have (many) settings to play around with.

Second problem considering the performance of my game is KeepCalm Plugin and its ressource usage. Whenever playing GTA V, i experienced a heavily loaded RAM and quite some FPS less than without using KeepCalm. I planned to upgrade my RAM anyway so I decided to buy 2 RAM Modules to Upgrade from 8 to 16 GB. Scince GTA V always got the RAM filled up to 100%, I thought having more RAM wouldnt be a bad idea scince it looked like "it would consume more if there was more".

Yesterday, I installed new RAM, got into the game, played a while, looked on the ressource monitor. RAM usage was constanlty on about 7.8GB - the same exact amount as before. The new RAM was detected by the System ("16 GB installed, 15.8 GB usable"). Scince the amount of RAM that is used, I am thinking there might be a problem that GTA doesnt detect the new RAM. It might sound stupid and I cant imagine that GTA "remembers" always to had 8GB and now doesnt detect the new one but it just feels like that.

Any ideas? :)