System validation gpu! help

Guys when i run splinter cell black list it starts by saying system validation in progress then after a few seconds it says the amd radeon r9 200 series is not supported???? 

by the way i have a i7 4790 cpu with 16gb ram and my graphic card is a amd radeon r9 280x asus direct cull top oc card with 3gb of vram.

so after that message comes up i carry on and select load game anyway the game then runs fine i play it on ultra 1080p everything maxed out and after like 10 minutes of playing the game crashes and windows says its trying to find a solution and resolve the error. 

please help guys any information would greatly be appreciated. BTW i know the games a little old :P but i always wanted to get around to playing it but pc was never good enough till i built this pc 1 month ago :)

Hi there

Seems like you're not the only one with this problem, there are a couple of possible fixes discussed in this Steam forum.

Apply some of those fixes and let me know if anything changed :)