https://bugs.freedesktop.org/show_bug.cgi?id=110199
--- Comment #4 from bmilreu@gmail.com --- (In reply to fin4478 from comment #3)
You both have cheap low quality Sapphire cards with 2 year warranty here when Asus has 3 years. Custom bios in those cards are famous to cause problems with Linux.
Please don't post outside your own bug reports if you're not contributing with anything useful. This is not Phoronix or a discussion forum.