I thought i saw someone post that a 970 strix didnt fit. Would like to confirm with anyone that has tried
Correct.
It won't fit. The problem is this corner of the PCB, which runs into the rear chassis flange:
If you're not afraid to take a dremel to a $350 video card (and void your warranty), it's a fairly minor mod to make it fit.
Incorrect.
If you take out the rubber plug for the clip at the back that bit fits in fine. The problem lies with the heatpipe. It sticks out over the edge of the case and prevents the side panel being put on. Same problem with the 980 Strix.
EDIT: Upon closer inspection it seems that the 970 strix is very marginally shorter which may allow the side panel to close.