So I found how to install the 347.88 drivers for the GTX 980Ti.
Download the drivers. Then find the nv_dispi.inf file in the drivers you downloaded, and edit it.
1. Add NVIDIA_DEV.17C8 = "NVIDIA GeForce GTX 980 Ti" under the [Strings] section
2. Add %NVIDIA_DEV.17C8% = Section043, PCI\VEN_10DE&DEV_17C8 under [NVIDIA_SetA_Devices.NTamd64.6.3]
3. Save the .INF file
4. Open cmd as admin. Enter the following:
bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS
enter
bcdedit -set TESTSIGNING ON
enter
5. Open msconfig and disable windows update under services. restart.
Once the computer reboots run the setup for the drivers. Reboot when finished installing the drivers.
If your computer doesn't get past the windows splash screen when you reboot after installing the 347.88 drivers, you might need to DISABLE the Execute Disable Bit (usually under the CPU settings) in your BIOS.
Good luck, it worked for me.