"Performance wise this particular card is on the level we expected it to be. Since the R9 390X is basically a rebrand of the 290X with 4 GB of additional memory, it's able to score a few more frames especially running UHD. Most games, when they're being run at UHD, require more than 4GB of VRAM and that is actually where the 390X with 8GB scores."
Marc Buchel - OCAholic.
ASUS STRIX-R9390X-DC3OC-8GD5-GAMING graphics card review by OCAholic - Introduction & Conclusion.