Destiny 2 launched on PC today, and for most players it’s been a pretty pleasant experience. Despite heavy server load, people have been able to sign in and get playing quickly, and it’s been a pretty smooth experience for most. But there is one huge exception for users on specific AMD processors.

For details on what to expect from the in-game action, check out our Destiny 2 review.

It seems that Phenom II processors aren’t supported by the game, and almost every crash report on Bungie’s forum and the DestinyTechSupport subreddit all share that processor type in common – most typically the crash happens when loading a character. One of Bungie’s help accounts has responded to say they’re looking into it, but it’s likely that Phenom users are out of luck for the time being.

Bungie’s own known issues postsays “Destiny 2 will not run on processors without Supplemental Streaming SIMD Extensions 3 (SSSE3),” a feature that these processors do not support. Whether a fix is in the works remains to be seen, but some affected users have already had success in requesting refunds.

The Bungie Help Twitter suggests running “scan and repair” through Battle.net, but this only seems to fix certain crashes not associated with the Phenom CPUs.

It’s a particularly strange issue considering that the problem wasn’t present in the PC beta, and you’d think a bug affecting an entire class of CPU wouldn’t be introduced in the transition from beta to full release. We’ll be keeping an eye on the bug reports, but for now you’ll wanna steer clear of Destiny 2 if you’re on a Phenom.