I can no longer justify purchasing a X70s card for close to a $1,000 CAD
you can't and you needn't,
$130 radeon 570 8GB has as much power as a console,
$315 nets a new Vega 56
and ~$425 a used 1080ti
the first GPU i used at 4k was a GTX 970 with mere 4GB( aka 3;5GB).