A rundown of what I have.
 
EVGA GTX 560 Ti 2048MB which has a custom cooling fan instead of the stock fan/cooling. Overclocked and fully tested/benchmarked using the DVI cable.
 
Recently, I tried to update the GPU drivers to 304.48 (which was listed on the EVGA website) only to get a black screen and nothing else was working. To get a screen back, I had to plug the VGA cable into a DVI adapter, then into the card. With some research, I found the 304.48 drivers are faulty and cause the black screens. 304.78 was the hotfix to address the issues released by nVidia. 
 
But since originally trying the update, my DVI has completely stopped working. The first port "No signal" and on the second "Input Not Supported". Once in awhile, when plugged into the 2nd port, I get a screen but there is red scratches everywhere. VGA, works perfectly fine on either port. And no, the overclock is just fine. I have been running this overclock and card for the past 4 months with no issues. Temps are in the low 50s even at stress testing.
 
So, anything I could try to remove/change to get the DVI to work? Is there any chance that it would be the DVI cable? If so, what kind of things could happen to know it was the cable? I don't believe it to be a completely faulty card because it's running fine using VGA.
 
Oh, and after using 304.48 then updating to the hotfix 304.78... I went back to 301.42 as I knew there weren't any issues with that and that is when my DVI did work before.
 
Any help would be greatly appreciated.

Welcome to the EVGA forums
 
When experiencing issues after a new driver install, any videocard "overclocks" should be removed.
A overclock that "works" with one driver, might not or cause issues with another....
 
When installing the new driver, did you use the Custom install feature with "clean" install checked? Before installing the driver, did you -completely- uninstall your overclocking software (AB or Precision) and then re-install it after the new driver was in? 

Thanks. Been using EVGA cards since '08, finally had a reason to post on the forums. :P
 
And yes, un-installed all the drivers. Turned off the overclocks. Used the clean install feature on the installer. The issue isn't the overclock though. It's that I can't get DVI to work anymore. Unless that's a way to troubleshoot for DVI issues as well. 

hmmm... do you have another DVI cable you could try?

That's what I've been looking for. May need to go out an buy another.
 
Is it possible the DVI could get fried randomly?

archeronx1


That's what I've been looking for. May need to go out an buy another.

Is it possible the DVI could get fried randomly?

 
They can go bad... but thats -very very- rare.  Try NOT to buy another, just use one from your TV or cable box for testing

Okay. I did some further investigation and with my specific system build, the 30x series drivers do not work.
 
I had to downgrade all the way to 296.10 to get the system to stop putting the core clock cap to 405 mHz (I still cannot go over 1000 but 1000 is much better than 405)
 
I haven't tested using DVI yet, but will update what the verdict is.
 
Is this a known issue with the GTX 560 Ti cards and the 301.x/304.x drivers to downclock when playing games? Scratch that... downclock at any time. I know "low idle" is 51 mHz, and watching a video on youtube or something goes to 405 mHz, mine just stays at 405 mHz. A few of my friends with the exact same card are having the same exact "slowing" issues. 
 
While trying to figure out why my DVI stops, I find a way to temporarily fix the downclock issue. Guess I can't complain too much. :)

The drivers are designed to downclock as a powersaving feature. This works well most of the time, but on some users setups/older games it can get confused....
 
To keep the drivers from downclocking while playing a game, use the NVCP to select "Prefer max performance" (shown below)

 

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Already had that selected. Also using "Single screen" instead of multiple. There was no change in the downclock.

You are running the card at STOCK (no overclocks of -any- kind) right now for testing right?

Did it for both. Stock and overclocked. But I did 75% of the testing on stock. 
 
Currently, when trying to overclock with the EVGA Precision X, I still can't get it over 1000. Max temps have been 45c on full load. 

archeronx1


Did it for both. Stock and overclocked. But I did 75% of the testing on stock. 

Currently, when trying to overclock with the EVGA Precision X, I still can't get it over 1000. Max temps have been 45c on full load. 

 
45c on Max load?  on AIR cooling?  that seems totally incorrect.
What videocard cooling are you using? What are the air temps in the room? What software are you using to "see" the videocard temps?
 
45c under MAX loading conditions is just not possible on air, unless its like 60f in your room and you have the videocard fan blasting at 100%... even then it would be doubtful you could stay that low over time.

Running a Accelero Xtreme PLUS II triple fan cooler on the GPU, and on the case it has 3x 120mm fans on the front pulling air in, 2x side 120mm, top 200mm, and 2x 120mm back fans to pull air out. 
 
I use HWMonitor, EVGA Precision X, FurMark while testing which shows a temp, and I have internal temp sensors to a front panel LCD fan controller which has the internal temp at 26-30c.
 
And to correct earlier, 45c is under gaming with full graphics loads. Never gotten over 45c while running any intense games. Full stress testing, the card only gets up to 62/63c but I have never seen any games or conditions that push it to the edge like stress testing.

archeronx1


Running a Accelero Xtreme PLUS II triple fan cooler on the GPU, and on the case it has 3x 120mm fans on the front pulling air in, 2x side 120mm, top 200mm, and 2x 120mm back fans to pull air out. 

I use HWMonitor, EVGA Precision X, FurMark while testing which shows a temp, and I have internal temp sensors to a front panel LCD fan controller which has the internal temp at 26-30c.

And to correct earlier, 45c is under gaming with full graphics loads. Never gotten over 45c while running any intense games. Full stress testing, the card only gets up to 62/63c but I have never seen any games or conditions that push it to the edge like stress testing.

 
You should never run HW monitor and Precision X at the same time.
Doing so, can sometimes create problems or issues as the same sensors on the videocard are being polled.
The issues can be minor (mis-reporting, clock issues Etc) or sometimes quite serious (disabling of fan or RSOD)...
 
Also Furmark is no longer a valid test and really should not be used anymore, as Nvidia has placed HW and software blocks on the program (Furmark) and it no longer functions as the test it once was.  

No, never ran at the same time. Only ran 1 per test, and only do so to gather multiple sources of values then I take the average to get a more rounded number and just 1 value.
 
Well, getting off track of (getting into overclocking specifics :P) is there any indication that my card would be faulty or would it be caused from the driver updates?

I really dont know, how have you been overclocking the videocard... what core clocks? have you also been clocking memory. Even if you pushed the card to hard, that should really not effect the DVI.
 
Has the DVI cable been bent tightly, any chance it got pulled, bumped, chewed or stepped on?
 
Use a flashlight and look at both ends of the DVI connectors on the cable, do you see any "bent" or "missing" pins?

Been overclocked for about 6 months? But it was never overclocked too much. I did little steps and made sure there was enough voltage as well. I always checked on temps, to make sure they were continuously low. 
 
There was a power outage one day from a storm, since then it did act kinda weird. I updated the drivers to 301.x that same day too. 
 
The DVI cables were never touched. I tried updating to 304.48 yesterday (which of course, black screened). Ever since then, DVI has never worked. So it baffles me that an update would cause the DVI to stop working completely.

"There was a power outage one day from a storm, since then it did act kinda weird. I updated the drivers to 301.x that same day too."
 
Well that sure sounds like either the Videocard or the Monitor took a voltage hit during the storm.
 
I suggest you try and take the monitor to a friends house who uses a DVI cable and test it... it it works, RMA the--> videocard.
If the monitor does not work on another system with a DVI cable, then the Monitor is damaged and your videocard and DVI cable are fine. 

The storm was about a month ago. I  wouldn't think it would take a month to show any signs?
 
But I'll check out the DVI stuff on another computer. 

Did you look into the ends of the DVI cable like I suggested?
Many times I have seen pins break off into the connector itself or get bent....
Certainly worth take 2 mins and checking it out with a flashlight

Yup. Looked it over, all the pins look straight and none are broken. They don't even look scratched.