Hello Kpestalozzi,

My ASUS GTX970 STRIX fits very tightly into the case. In this case, the cables of the PSU are NOT in the direction of the graphics card, so you have a free field. The length of your card is +5mm to mine, so it can work really tight.
The enclosure allows 315mm grakas, but simply with more effort and forethought when installing.

Greetings Mac from JCPC

Hello
I have a Sapphire R9 280x installed, which just fits in. However, I would advise against using a graka that is too power-hungry, as the case does not really offer much airflow and gets quite hot (despite the perforated side panel). I have an AMD chip as my CPU, but it gets very hot (60 degrees, in a larger case only about 45 idle). Also with the PCI-E cables, space could be tight.
I also have a 1070 in my other PC (ATX case) and even there the cooling is just ok.
LG