Whatever graphics card you can afford. It all depends on if your CPU is powerful enough, your PSU sufficient enough and if your case fits such graphics card. It is not determined by motherboard but by those aspects.
Whatever graphics card you can afford. It all depends on if your CPU is powerful enough, your PSU sufficient enough and if your case fits such graphics card. It is not determined by motherboard but by those aspects.
I do not suggest such a graphics card as the CPU wouldn't be able to let the GTX 980 Ti 'Fully unleash'. There would be quite a bottleneck most of the time.
Also, with a graphics card as valuable as the GTX 980 Ti you want to have a top quality power supply to keep it performing at It's best. There are a lot of power supplies on the market but only a selection of them are good so you have to provide the brand and model name of the power supply:
Graphics card suggest for that CPU:
NVidia GTX 970
Additional suggestion
You could wait for the Intel i5/i7 Skylake processors to roll out and combine those with the GTX 980 Ti. Intel Skylake is about 2 months away.