Nithin57 :
hey MauveCloud if add a phanteks enthoo primo in pcpartpicker.com it says like this.... The Phanteks Enthoo Primo ATX Full Tower Case supports video cards up to 515mm long, but video cards over 257mm may block drive bays. Since the Asus GeForce GTX 1080 8GB STRIX Video Card is 298mm long, some drive bays may not be usable.
Actually, I looked up the manual for the Enthoo Primo at Phanteks website, and the video card clearance is more complicated than that:
257 mm (reservoir bracket installed)
277 mm (reservoir bracket installed w/o cover)
350 mm (no reservoir bracket)
390 mm (HDD cages in front position)
515 mm (no HDD cages)
Also, it looks like there are two separate hard drive cages, one of which is down near the power supply area and probably wouldn't interfere with graphics cards if that one was left in while the other was removed. I'm less certain of that, though.