I've read on some posts that there is a fix for lag, stuttering, lousy framerate,................ for people with Nvidia cards but I cannot find the information. Can someone link me to the fix please? Thank you

Did you read the pinned threads? OK, that was a useless suggestion, sorry. I don't know why there is no summary of various FAQ threads up there.

Look at this thread:

http://www.gamesas.com/index.php?/topic/1123569-fps-drop-when-near-npcs-thread-3/page__hl__NPC%20lag

No such thing.

There is a work-around that has been known since the very first day. It's not a perfect one, and there are two others as well. They are all in the same message thread, now, though. See the edit to my original reply.

I used the d3d9.dll fix to take care of the laggy NPC issues I was having. I was also getting huge stuttering chop when I would look around outside in the wasteland, didn't seem related to anything in particular except for it seemed to happen most when smoke or the rapidly blinking lights on casino signs were coming into view. My fix turned out to be creating a custom profile for the game through the Nvidia 3d control panel and forcing vsync and triple buffering on. *shrug* Works like a charm now. Don't know why it works, it's set to use all that through the launcher graphic options. Oh well, if it helps at least one other person get playing this sweet sweet game then I'm happy.

Question; how do you make a custom profile for Fallout new vegas, if you got the steam version?
I can only add "Valve (steam)" as a profile and i'm not sure that my intended forced settings for Fallout should effect all my other steam games aswell.

You can add Fallout: New Vegas as a profile. When your adding a custom profile through the Control Panel and the prompt pops up to browse for the file, just go to your Steam folder in Program Files. Then you go to steamapps\common\fallout new vegas\ and the falloutnv.exe is in there.

Thanks waffle.
Sadly forcing Vsync and Triple Buffering did absolutely nothing.
4+ NPCs = 1 FPS for me ><

That only fixed the outside world stuttering for me, to get better framerates around NPCs I had to do the D3D9.dll fix. There's a sticky for that I think, if not there's a million threads that explain how to do it.

Oh trust me i've tried that aswell. It helped on the slow motion when engaged in conversation with NPCs, but nothing else.
Forcing Vsync/triple buffering did nothing either.
.ini tweaks did nothing.
Changing the game settings in every possible way did nothing ><

Looks like there are bandaids that have helped some but not others :nope:

Thank you for your responses everyone. I am not counting on a fix from Bethesda because they didn't fix the crash issues in FO3 so I'll try to figure out how to do some of these fixes you've mentioned and hope they work on my computer.

I was getting really bad framerates on my 9800gt 1024 mb card so I rolled back my nvidia drivers from the 260.89 to the 258.96 and it made a huge difference !!! also im using the d3d9.dll fix as well but the driver roll back is what did the trick for me ...now to just fix the constant intermittent screen freezing !! which for some reason if i ctrl alt delete a few times it will kick me back to my desktop and then i can go back into the game which has reverted to the pause menu and i can start where i had frozen up at ...still its really annoying to have the screen freeze up so much ......hope this helps

I don't know, crash problems are one thing, but virtual unplayability on a huge number of people's machines is another. They had better fix these issues, or they're looking at serious PR problems and loss of revenue. Word travels really fast, and nobody is going to buy a game everyone tells them is broken with no dev support.

That's odd too, I was using 258.96 and getting the chop so I tried updating them to see if it made a difference but for me, no. I'm running on just plain "High" defaults for graphics options as my card doesn't have too much horsepower but it plays just fine now with the vsync and triple buff forced. I guess one other thing I should mention that I did was force single screen mode instead of multiple monitor compatibility (only if you're running more than one monitor, obviously) in the custom profile I made for New Vegas. I can't imagine that was the culprit but I did all of those 3 settings at the same time and when it worked I just let out a woohoo and never bothered to find out which one did it specifically. My card is a lowly 9800gt 512 meg if that matters to anyone.