HP AMD Radeon R9 390X Bios update | TechPowerUp Forums
PSA: If you have an AMD R9 390, Vive game's probably aren't rendering correctly and this issue may be the cause of stutter / missed frames / lowered quality : r/Vive
Sapphire Nitro R9 380 and 390 Video Card Review
Sapphire R9 390 Nitro 8GB Review | KitGuru- Part 2