Poor Performance with High end PC - Tera Online

Please excuse my English and grammar, it's my native. Thank you!

I'm currently experience very very poor performance trying to play an MMORPG called Tera Online, my issue with the game is the huge amount of choppy and fps lag to unplayable levels.
Video : http://www.youtube.com/watch?v=yNCOV3Ex7-o&feature=youtu.be
It actually get WORSE if I toggle between full screen or use windowed full screen then alt tab, to the point I can't even close it out without ending process via CTR ALT DEL.
Here is my specs:

Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
3.5 GHz Performance Rated at: 8.75 GHz
16 GB
Microsoft Windows 7 Professional Edition Service Pack 1 (build 7601), 64-bit
GeForce GTX 780
671.6 GB Free Space

Of course before going here, I've already tried every fix available online, they all can be find here:

which gives me no solution to my problem, changing the files, codes, graphic setting, both in game and via Nvidia inspector or 3D options does not make any different.
the game struggle to run even at lowest setting like the video, while I can handle playing multiple games with 3 monitor at ultra setting such as Battlefield 4 or Grid 2.
It make no sense!

Please help me as Ive hit a dead end on this.
Thank you so much for your help and time.
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Andy MIT Systems ManagerCommented:
Yikes, that is quite choppy. As you've already tried all different settings my recommendation (if you haven't tried this already) would be to change your Graphics Drivers - sometimes a simple incompatibility in a driver can cause issues with games (try the latest driver, if that doesn't work try some older ones - I believe you can get legacy drivers from Nvidia's site).

I would say also check latency (connection between your computer and the servers) in-game but based upon the video you provided I'd lean towards a graphics issue.
YukiraAuthor Commented:
Hi Morty.

Thank you for the reply, I think I can certainly say this is a graphic issue.
The latency is always at green at I have a rather fast internet connection, server is not during populated time as well.

I tried you suggestion and downloaded 3 different Nvidia GTX 780 Legacy Driver, even the betas, which also yeld no result or any improvement.
Here is a thing I notice though. In game, if I happen to be in town where multiple npc and player is present, the choppy is very constant, but outside in fields, the frame seem to be more stable, but choppy and fps drop is still present.
Another thing that I'll like to add is that the FPS is stable as long as the camera/character stay still, I can get a 80-100 fps for hours as long as I don't move the camera or the character, but as soon as I move, instant fps drop/choppy.

Thanks again.
Andy MIT Systems ManagerCommented:
Sounds like it has issues re-drawing moving items (towns and the like in MMO's are havens for numerous players so you tend to get more slow-down as people move about where open fields there's not as much movement).

All I could suggest is reset the Nvidia settings to default and then go through the game settings one by one toggling them on and off to see if one particular one makes a difference (from experience it usually ends up being vertical sync, triple buffering, anti-aliasing, refresh rate or lighting effects). Aside from that it could be a bug with the game itself - maybe something it doesn't like on the graphics driver/card?

The only other test I could suggest (if you have access to one) is to try a different graphics card, ideally a different type to the one you have (if possible an ATI/Radeon card) to see if you have the same issue. I once bought a game that would not run at high resolution (above 1024x768) unless it was played using a Geforce graphics card (had an ATI Radeon at the time) and it wasn't until I swapped them over that I discovered the problem.
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YukiraAuthor Commented:
Hi Morty

Yeah the whole town/cities lagging ins't really a stranger to us gamer, esp I've been through so many mmorpg.
I got an ATI Radeon HD 7770 from HiS, which is rather outdated, I would't mind using it but the pc case I bough are only designed for single card, and switching out the GTX 780 with almost half a grand for a 5 year old card just to play Tera is just absurd :/

I've tried find help on Nvidia GeForce forum which they suggest me its a compatibility issue and told me to try contact the developer, which I did and now they suggest it might be a software conflict but they have no suggestion other then then closing out back ground app to help the game run better (right.)

so yeah between this and other two places, I think I'm running out of options.
it's pretty ridiculous for a modern rig this expensive to under perform a 8 year old dinosaur computer which I had before that ran Tera perfectly.
YukiraAuthor Commented:
I guess I should close this or something, seem like it's case impossible.
Andy MIT Systems ManagerCommented:
Hi Yukira

Sorry on the late response - been on holiday. I'm unfortunately out of ideas of what else to try on this one too - from the sound of the details given by Nvidia and the game forums it is indicating a compatibility issue between the game and NVidia drivers/graphics card (assuming it works fine when using your ATI card).

If this is the case there's not really a great deal that can be done apart from providing the game developers with as much info as possible and hope they'll try and patch it as some point.

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YukiraAuthor Commented:
It's okay! I'm still on board with the game's dev and Nvidia, maybe they'll help me figure out something at some point.

Thank you for sticking with me, have a happy thanks giving!
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