MST doesn't work when using an R5 430 on Centos 7.4 with two Dell U2417H monitors.

I've been searching for the specs on R5 430 to see what kind of MST support it has but i'm coming up short.

 

The machine is a

Manufacturer    : Dell Inc.

Model Number    : OptiPlex 7050

Graphics Card   : Intel Corporation HD Graphics 630

Advanced Micro Devices, Inc. [AMD/ATI] Oland [Radeon HD 8570 / R7 240/340 OEM]

Cpu             : Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz

 

OS is

Description: CentOS Linux release 7.4.1708 (Core)

 

Monitors

2 x Dell U2417H

 

Would I need specific drivers or a MST HUB to get this working?

MST works when using the on board video, but i would rather use a dedicated video card.

 

Thanks in advance.