Dell tested or certfied gpu for dual UP2414Q setup @60hz

Hi Does Dell have a certified or tested gpu for dual UP2414Q setup.

Hopefully without breaking the bank  $400 us mark?

That can run both monitors at 60hz.

Not many dual have dp 1.2 gpu around, i have checked it seems Amd 280X do, but non states v1.2 and mst capable.

I am hoping dell have one they have tested.

Thanks in advance.