Machine Won't Boot After GTX 760 Installation

That's definitely a solid PSU that can easily handle a system with a 760.

I would say put the PC back to the way it was before the card and update the motherboard's BIOS to the latest release. In a lot of cases, a BIOS update can fix any hardware compatibility issues you might have.

Re-install the 760 afterward and let us know if it works.

I'd also be inclined to think you have a bad video card because I've experienced the same symptoms with a bad card in the past, but it can't hurt to try.

If you can get it to work without the new card I suspect you did not get rid of all of the old drivers. It seems to be a common problem I had the same problem the first time I upgraded my gpu. If you can get it working in the original configuration go ahead and do that after that download this program run the program re install the new card and install the drivers. 99 percent of the time this is the problem good luck

http://www.guru3d.com/files_details/display_driver_uninstaller_download.html

Try this
http://www.techspot.com/downloads/4266-driver-sweeper.html

Did you switch the graphics card in the bios fro IEG to Peg

A single beep when the splash screen appears is not a bad beep code. In most cases and for most motherboards, a single short beep on startup is a good thing but usually doesn't occur 20 seconds later. That seems too long before hearing the beep.

Can you put the old GPU back in and boot up with the new PSU?

Had the exact problem, I downloaded Gigabyte's @Bios software, and updated the BIOS from WINDOWS which I was somehow able to load after said three beeps. The card works fine now.

Hey guys,

I have an almost identical problem with my GTX760 (Gigabyte). There are literally thousands of people with the EXACT same problem, just labeled differently. To me, if it's not a broken card, it's most likely a TDR problem, and the cause of that problem is hard to isolate. (but I am far from knowledgeable on this kind of stuff)

The only way I have gotten it to work is by installing the 322.21 NVIDIA drivers AND increasing the TDR delay time to 8 seconds. Even then, this solution works for about a month, then my drivers start crashing again and I have to spend a day or so repeatedly reinstalling drivers until the computer runs again. I have tried literally every version of the drivers and only 322.21 works for me. I also found not included the HD sound drivers in the installation helped sometimes, but other times it didn't. My last crash occurred after playing BF4 for a few hours, then having an hour break and playing CS:GO. Again this is most likely a coincidence, but last crash I had was a few months ago, after I had been playing BF4 for a while. (In between these two crashes I had not played BF4, because it sucks)

I've contacted both Gigabyte and NVIDIA support, NVIDIA says its Gigabytes fault and all they really said was to replace the card, Gigabyte says it's NVIDIA's fault and to contact them.

I have tried every suggestion I have found online and the only things that have worked are those I mentioned above. There are some other possible sources of the problem which I have read online. (Note these are not my suggestions, I don't know if they're even relevant but when you're trying to fix your computer it's worth a shot).

Some people have said Daemon tools can cause TDR problems. Transparently there is some malware going around which can also cause TDR issues. I have uninstalled Daemon tools, but my computer was already stable when I did, so I can't say if it made a difference.

I have seen someone say it was because they overloaded their power adapter. They solved their problem by plugging the computer straight into the wall.
It's probably not true in my case, but I noticed a bit of freezing if I overloaded my adapter. I didn't properly test this, I just accidentally had a whole lot of things on at once and notice the computer was frozen on startup.

Some people have replaced their cards to find they still have the problem.

Many people have reformatted there computers and had no improvement.

There are a bunch of TDR fixes, the important one is TdrDelay, Microsoft has released a quick 'fix' which sets this delay to 8 seconds. You can find this fix online, or just add the registry entry yourself, there's a bunch of guides on youtube for it.

To check if it is the drivers:
Boot in safe mode, go into event viewer and then search through the logs right before the crash. You may see some critical errors from the NVIDIA dlls, and some system errors saying they're trying to reboot the device. That being said, I have only really seen these errors when I have actually made it to desktop, OR:

Boot in safe mode
uninstall drivers using DDU.
Reboot normally. Your system should run fine.

Install NVIDIA drivers now a few things can happen:
Crash right after the display drivers are installed.
Constant freezing after the display drivers are installed.
Constant freezing towards the end of the installation.
Runs fine after installation but after rebooting you get freezing/crashing.
Runs fine after installation but after attempting to play a game you get freezing/crashing.

In any of these cases you should see driver crash logs in the windows event viewer. In this case increasing the TdrDelay might solve your problem.

Where I am at right now, before I get the card replaced, I'm going to buy a second hard drive (was gonna get one anyway) and install a fresh copy of windows on it, one by one install my drivers (NVIDIA last) and see if it breaks. If it doesn't, then I guess it was a software issue.

Note:
Most of the information I have seen about these issues have been from NVIDIA/Steam forums. There have been some good threads on other gaming forums, but in most cases their solutions are the TdrDelay fix.

Hope this helps at least a little,

Thanks.