I installed a brand new GTX 670 in my rig about a month ago and for the first three weeks it was performing splendidly. A week ago I experienced the first crash during a three hour session of Shogun 2 and from then on out I've experienced crashing and brief input signal loss from my DVI input on my monitor. When I say brief, I mean about 2 seconds. 

Now, I've only been playing Skyrim and Shogun 2 in the past week but I'm experiencing the same problem with slightly different symptoms in each game. I have never experienced this problem outside of gaming.

Shogun 2 symptoms:
-I am completely unable to play in DirectX11 mode. The monitor loses signal within a minute of loading a game and boots me to the desktop. I still see the Shogun icon in the taskbar but I am unable to get back into the game forcing me to use task manager to end the program.
-I am able to play in DirectX9 mode, but the monitor still loses it's input signal every 5 minutes or so. When the monitor regains it's input signal, instead of kicking me to the desktop like it does in DirectX11 it displays a loading screen as if I've changed some of my graphical settings around. Once it's done loading I am able to continue playing. However, I did experience hard crash under directx9 last night after the monitor lost signal. The sound looped for about a minute before it gave me a BSOD.

Skyrim symptoms:
-I can play for anywhere from 5 min to 30 min before monitor loses signal. When it regains the signal I experience an enormous drop in FPS. I haven't measured the exact FPS, but I'm guessing around 20-30 indoors and around 15 outdoors. If I exit and restart the game, the problem is gone until the monitor loses signal again (which it inevitably will). This renders Skyrim virtually unplayable.

Specs:EVGA GTX 670 (not OC)
AMD FX-8150
Cooler Master 212 EVO Heatsink
ASRock 990FX Extreme4
Windows 7 Home 64 bit
Seagate 1TB HDD8gb 
8GB DDR3 RAM (forgot which brand)
Corsair CMPSU-750TX 750W (about 4 years old now)
ASUS VW246H 24" monitor

I've tried:
-Changing all settings to low.
-Monitoring temps. GPU doesn't get over 75c nor is anything else running hot (I did notice that the GPU got to 81c one time before I changed the fan speed profile).
-Uninstalling and reinstalling driver. 
-Rolling back to several previous drivers
-Disabling NVIDIA HD Audio as I've heard this has caused a lot of problems for people. Unfortunately, this wasn't the culprit
-Tried a different monitor.
-Full computer virus and spyware scan. Two minor spyware issues showed up but were apparently cleaned.
-Switching DVI cables.
-Switching out GPU.  My old GTX460 does not experience crashing in game.
-Using a driver cleaner to uninstall then reinstall driver.
-Reformat.  This was my last resort before I attempt to RMA.  Crashes still occur.

I am also taking into consideration that this might be a PSU issue, but it'd be a big coincidence that this happened right after I installed a new GPU.

This issue is starting to drive me insane. Any suggestions before I do anything drastic (reformat, RMA)?

maniacvvv

Welcome to the EVGA forums

Question: do you have any videocard monitoring/fan control software like Precision installed?

Once you answer the question above, we can get you fixed up in a jiffy
*your problem appears to be incorrect Nvidia driver install and use of the Nvidia GeForce Experience  

+1.  I'd suspect that before anything else.

Yeah I just need him to tell us what fan control software he is using...
Then I can post up correct recovery

Thanks for the detailed response...ill try this when I get home.

To be clear, I can continue using geforce Experience as usual?

Lord Humungus

Thanks for the detailed response...ill try this when I get home.

To be clear, I can continue using geforce Experience as usual?

Up to you, but personally, I wouldn't ever use it.  I think that's why in Maniac's instructions, he doesn't have you installing it.  But I'm sure he'll respond himself.  Don't want to speak for him.  You can do a much better job with your own game settings than software will do.  Just my 2 cents.
 
LOL.  I guess he posted just as I did.

Lord Humungus

I actually only used it as a convenient method of updating drivers. I glanced at the game profiles and disabled them not too long after I installed it.

This is all making sense as I started experiencing the issue shortly after a driver update and precision could have easily been running at the time. Ill update when I try maniac's suggestion.

Sounds good.  Let us know how it works out.

Did you remember to change your in-game settings?
Have you tried not using a save game?
 
I thought that game has a built in benchmark, have you tried running it?
 
Download and install Unigine Heaven 4.0 or Valley free benchmark tests
http://unigine.com/
 

I just confirmed that this problem is also occurring in Company of Heroes 2.  As soon as I begin a game the screen turns black and I get booted to desktop.
 
This problem needs to go away

Do you live in the U.S.?

Please check your PM's

Just saw your PM Maniac.  I am unable to PM you a response because it has not been 5 days since I registered, but I really appreciate your help with this. Talk about going above and beyond!  I will most likely take up your offer in the next few days.

Lord Humungus

Your confidence had me thinking this problem was all but solved, but alas it was too good to be true. 

I followed your directions to a tee and Shogun crashed the instant I loaded a saved game.  I uninstalled both Experience and  Precision.  I haven't reinstalled Precision at this moment.

Any other ideas?

Sorry to hear it didn't work out yet.  Maniac will get you straightened out on this I'm sure...

It's definitely not a cpu issue as it's not OC'ed and is not running hot.

Do you guys think it could possibly have something to do with my power strip dying? I've been using the same one for about 8 or 9 years now. My entire computer and peripherals are running through that thing. I've also noticed that I have to turn the volume on my speakers almost to the max to achieve the same level it used to have at less than half of max level.

Lord Humungus

It's definitely not a cpu issue as it's not OC'ed and is not running hot.

Do you guys think it could possibly have something to do with my power strip dying? I've been using the same one for about 8 or 9 years now. My entire computer and peripherals are running through that thing. I've also noticed that I have to turn the volume on my speakers almost to the max to achieve the same level it used to have at less than half of max level.

As was mentioned earlier in your thread, it could be your 4 year old PSU that's beginning to die. 

Hey bro, I am now available for the next 5hrs
 
Call me