Radeon Graphics Card

I have Radeon graphics card, i want to install driver for it. If it is present by default then how to use that. I am using Slackware Linux. And the command Code:lspci -v | egrep -i --color 'vga|3d|2d' gives:

Code:00:02.0 VGA compatible controller: Intel Corporation Skylake GT2 [HD Graphics 520] (rev 07) (prog-if 00 [VGA controller])
Memory at d122d000 (64-bit, non-prefetchable) [size=4K]