Improve FNV's Performance and Stability with Mods/Ini Tweaks

[Psycho]

1.INIS TWEAKS

Remove FPS cap and prevent crashing and freezing tweaks :
- Fallout.ini file changes (ini files is on My documents/my games/FalloutNV and Fallout_default.ini install location where is FalloutNV.exe) :

Change Fallout.ini: iPresentinterval=1 to iPresentinterval=0

This dont help FPS maybe, but prevent game freezing and crash:
Change Fallout ini: bUseThreadedAI=0 to bUseThreadedAI=1
and add another line after iNumHWThreads=2
If you still having crash then change it to iNumHWThreads=1

(ALTHOUGHT THIS IS FOR FALLOUT 3 TWEAKS , IT STILL WORKS FOR NEW VEGAS SINCE THE SAME ENGINE AND ALL)
The settings won't affect your image quality, but they do help with in-game stuttering. You can double the default values if you have 1GB of RAM, and then double them again if you have 2GB of RAM. The first two values (uInteriorCell Buffer and uExterior Cell Buffer) determine how much memory Fallout 3 dedicates to buffering these areas. You can leave these values at default if you wish, but if you have the RAM to spare, crank it up to at least the 1GB level. iPreload Size Limit determines how much RAM Fallout 3 gets to play with when it has to load levels.

Default:
uInterior Cell Buffer=3
uExterior Cell Buffer=36
iPreloadSizeLimit=26214400

1GB of RAM:
uInterior Cell Buffer=6
uExterior Cell Buffer=72
iPreloadSizeLimit=52428800

2GB of RAM:
uInterior Cell Buffer=12
uExterior Cell Buffer=144
iPreloadSizeLimit=104857600

If they aren't already set to 1 in your .ini file, change the following settings to 1 for some preloading goodness. These settings allow the game to preload textures and other files related to where you are. Load times might increase a little bit if you do so, but the change should noticeably reduce in-game hitching.

bBackgroundLoadLipFiles=1
bLoadBackgroundFaceGen=1
bBackgroundCellLoads=1
bLoadHelmetsInBackground=1
iBackgroundLoadLoading=1
bBackgroundPathing=1

If you happen to have a dual-core CPU, enable the following settings. They, too, will help with loading and give slight boosts to performance.

Multithreading Tweaks:
bUseThreadedBlood=1
bUseThreadedMorpher=1
bUseThreadedTempEffects=1
bUseThreadedParticleSystem=1
bUseMultiThreadedTrees=1
bUseMultiThreadedFaceGen=1
iNumHavokThreads=5

2.UTILITY AND FPS/STABILITY MODS

FNV 4GB Patcher : http://www.nexusmods.com/newvegas/mods/62552/?
"A new solution to making your Fallout New Vegas 4GB aware. This handy little patcher is simple and easy to use."
NVAC - New Vegas Anti Crash : http://www.nexusmods.com/newvegas/mods/53635/?
Stutter Remover : http://www.nexusmods.com/newvegas/mods/34832/?
(This mod need some tweaks to get the best result :
- Go To steamapps\common\Fallout New Vegas\Data\nvse\plugins
- Open up sr_New_Vegas_Stutter_Remover.ini
- Find these lines :
MaximumFPS = 30
MinimumFPS = 10

Change those to FPS you wanted, i use:
MaximumFPS = 666
MinimumFPS = 28
- Change bHookLightCriticalSections = to 0 . It causes stutters , irony af)
Perfomance Of The Gods : http://www.nexusmods.com/newvegas/mods/45475/?
Better Game Performance V5 : http://www.nexusmods.com/newvegas/mods/51871/?
Zan AutoPurge Crash Protector (refreshing the game with adjustable settings) : http://www.nexusmods.com/newvegas/mods/49319/?
Purge Cell Buffers (refreshing the game) http://www.nexusmods.com/newvegas/mods/50363/?

If you REALLY want to get those good fps but don't give a ♥♥♥♥ about the graphics then i have more extreme fps mods :
ENB Performance Fix (Works with vanilla too) : http://www.nexusmods.com/newvegas/mods/56432/?
Clean-Deluxe NV : http://www.nexusmods.com/newvegas/mods/45116/?

Sources :
https://forums.nexusmods.com/index.php?/topic/1329941-how-to-get-fallout-new-vegas-fps-higher-30/
https://www.gamefaqs.com/boards/918428-fallout-3/46386417

EDIT 1 :
Added Texture Optimizer (Thanks Dove) : http://www.nexusmods.com/newvegas/mods/46074/?
It resizes your texture but maintain the texture's quality , use it for better performance ans stability