Trade 280x's for 290x?

Hardware GPU
1

I've been thinking about switching my CF 280x's for a 290x. FreeSync and mantle seem to be pretty interesting. What do you guys think?

2

Both Mantle and (eventually) freesync will be available on the 280Xs, so those are not reasons to upgrade. I wouldn't say there's any reason to make that change unless crossfire is giving you issues.