This is only on a rig with 2 GPUs, if you got more than 4 GPUs then you got no choice but to upgrade because from what I recall you can't use more than 4 GPUs. There was a fix for this during the Litecoin mining days of 2014 where you installed a patch, however that patch only worked with older GPUs like R9 280X. Reason why is because it only patched an old AMD drivers version from like 2015, the newer ones were never patched since most people just used Win 10 to mine.