Why not try the Raijintek riser:
https://www.overclockers.co.uk/raij...er-card-cable-pci-slot-adapter-ca-03r-rt.html
I have one and am planning on putting it into a rig i'm building. Has a latch which you can atatch to the underside so the card doesn't sag, and doesn't use up all 7 slots so to retain the use of a couple of pci slots below
https://www.overclockers.co.uk/raij...er-card-cable-pci-slot-adapter-ca-03r-rt.html
I have one and am planning on putting it into a rig i'm building. Has a latch which you can atatch to the underside so the card doesn't sag, and doesn't use up all 7 slots so to retain the use of a couple of pci slots below