rateddrew
I checked. everything is plugged up no problem. it is acting like a female. One day it was playing no problem the next day it was acting up. well not performing the way i should. 

CptSpig
I am having a similar problem. I ran 3d mark 11 last weekend and it kept crashing when overclocked. I installed a earlier none game ready driver and boom it worked just fine. Try installing a earlier version Nvidia driver see if you have different results. Try the 347.88 I had good luck with this driver. I have a 780 ti KingPin.

CptSpig
What model card is this does it have a LN2 bios? Are you overclocking this card with precision X and due you have Kboost enabled? The core clock and memory clock speeds are high along with the temperature.

rateddrew

CptSpig
What model card is this does it have a LN2 bios? Are you overclocking this card with precision X and due you have Kboost enabled? The core clock and memory clock speeds are high along with the temperature.

No sir I am not overclocking with precision X. I messed around with that a while back but never saved and clicked default. I do not have or know what Kboost is. my model is EVGA GeForce GTX 780 Ti Superclocked w/ EVGA ACX C. Since I used an older driver my clock speed and temp is down dramatically. 

core clock 324 mhz
mem clock 162 mhz
temp 30 C
 

rateddrew

arestavo
Sounds like thermal throttling to me. Have you tried using MSI Afterburner (or PrecisionX, which has problems) to set a custom fan profile? I've got two 780 Ti's, and they start thermal throttling at 80C, so I set my fans to spin up to 100% at 80C.
 
And if that doesn't work out, it may very well be a driver issue or you might be hitting near 3GB VRAM usage. Try turning off adaptive VSYNC, or if you refuse to do that, turn down some a couple settings to see if that helps.
 
Remember also that different areas in games can affect FPS more than others. And, the whole point of adaptive VYSNC is to not automatically drop FPS to 30 like regular VSYNC, but rather 45 and then 30 - so your system is technically doing what you set it up to do.

The settings was never an issue. Its like everything is working perfectly fine one day. And the next day on the same settings it starts performing wrong. Its like taking a car for a drive and doing 100MPH. the next day You do the same exact drive but its stalling at 70MPH. 
Like I said same set up same card but lower benchmarks. Same game but lower fps. I just switched the drivers from i believe latest 350 to the 347. i played nba and no slow down and i played gta v with no slow down just the weird lines on his face. I will check out the msi afterburner though. thanks for your suggestions i greatly appreciate it. 

arestavo
Ambient temperatures can play big a role as well, causing the GPU to hit the thermal throttle threshold.
 
One way to see is to take the side of your case off and check it again. With older even hotter cards like the 480s, I had to put a house fan blowing in on the cards to keep them cool. That shouldn't be the case with a 780 Ti, but you have the ACX version which dumps most of its hot air back into the computer case, and doesn't exhaust all of it like the reference 780 Ti's that I have (which is the reason why I will never buy EVGA's ACX cards due to my preference of using two cards and the inherent heating issues that can cause with ACX coolers).

arestavo

CptSpig
Saying that the ACX coolers don't cool as well as reference cards is so untrue. ACX cards stay much cooler than reference cards this has been my experience. If you have a problem with these cards it is usually the case does not vent properly. But this is really a moot point because it looks like it's a driver issue. One last thing did you use display driver sweeper or some program make sure the entire driver was uninstalled? If not I highly recommend you do this and than install the working driver again.

I wrote that multi-card ACX setups don't cool the cards as well, and it's been written about in this very forum by the folks that own them. And yes, force enough air into a case and you can cool a nuclear reactor, but those fans will SCREAM.
 
For single card systems or systems that you can widely space out two cards ACX will be superior. However, sandwiched ACX cards will not have superior cooling in many cases (which is the point I was driving at, and many folks don't have good enough airflow to do it - for that matter, my full size case that has four 120mm side door fans probably can't because they couldn't handle my old quad SLI 580 classifieds).
 
And it very well could be a driver issue, or a combination of issues.