I investigated a little bit, here's what GPU generation brought 4K texture support, per manufacturer:
NVidia: GeForce FX series, released in 2003
AMD: Radeon X1000 series, released in 2005
Intel: this is the odd one out, again: GMA X4500, released in 2008
I investigated a little bit, here's what GPU generation brought 4K texture support, per manufacturer:
NVidia: GeForce FX series, released in 2003
AMD: Radeon X1000 series, released in 2005
Intel: this is the odd one out, again: GMA X4500, released in 2008