
I tested this in SuperDuper Mart Area and in Springvale but the same drops are in many other places. The original Fallout 3 works flawlessly on max settings without any FPS drops - I have 60 FPS everywhere, no matter where I look. Well, depending on where I look I get FPS drops from 60 to 38-45 in Capital Wasteland. Here are my Fallout.ini and FalloutPrefs.ini. This is my current load order, though the problem is not related to additional mods since I tested the game on a new character with only TTW installed and it was exactly the same.

I use Mod Organizer and I have Fallout 3 GOTY / Fallout NV Ultimate Edition on Steam. Using Windows 7 now but the same was happening on Windows 10. My rig is i5-4440 / 8GB of RAM (2x4GB) Kingston HyperX / Gigabyte GTX 970. I don't use ENB, for graphics I have only NMC Performance texture pack (though I tested this without graphic mods with only TTW installed on new character and it was the same). I tested this already a lot and I know for sure that this problem only occurs when I play in Capital Wasteland on New Vegas engine (TTW). FPS drops happen in both interiors and exteriors.

I'm having some really annoying FPS drops around Capital Wasteland that aren't happening in FO3 on original engine. For some reason TTW is not working too good on my PC. Sorry for the long post but I want to write as many details as possible.
