Thanks to a last-second VBIOS upgrade, some Radeon RX 5600 XT graphics cards are much faster than others. Here’s what you need to know, and how to make sure yours is upgraded.

AMD’s $279 Radeon RX 5600 XT launched this week, and it goes toe-to-toe with Nvidia’s powerful $350 GeForce RTX 2060, nearly matching even AMD’s own $350 Radeon RX 5700 in several games. Sometimes. Other times, it’s merely an okay alternative to the $279 GeForce GTX 1660 Ti, which itself was effectively rendered obsolete by the launch of the $230 GeForce GTX 1660 Super last fall. Talk about Jekyll and Hyde. It all depends on which custom model you buy, and whether that card has the correct software preinstalled.
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https://www.pcworld.com/article/3516108/amd-radeon-rx-5600-xt-graphics-cards-vbios-confusion.html