PCWorld claims that Nvidia's RTX graphics cards won't launch with ray tracing enabled in any games. Nvidia senior VP of content and technology Tony Tamasi says that Microsoft's Ray Tracing API, which Nvidia's RTX is built on top of, isn't available in Windows 10 yet, implying that we'll have to wait for the October 2018 update for official support. However, PCWorld also says that developers have had access to ray tracing though Windows Insider Builds for some time. Windows users can sign up for public insider preview updates on Microsoft's website, and it's unclear if slow ring or fast ring users will have access to ray tracing before those builds go mainstream. Tamasi said we’ll see ray traced games appear about a month after the GeForce RTX 2080 and RTX 2080 Ti launch. Perhaps not so coincidentally, Microsoft has also teased the perfunctorily named Windows 10 October 2018 Update, the second big Windows update of the year, though it hasn’t committed to an exact release date. Expect the first ray traced games to appear shortly thereafter. And if you preordered a custom GeForce RTX 2080 or RTX 2080 Ti graphics card, don’t expect to play with its marquee new feature when it arrives on your doorstep.