I think the latest patch, the one from this week that gives BF4 a similar UI to BF1, has caused more problems for Mantle. With my 380x crossfire system, I used to only get crashes (no error message) on Paracel Storm, now I get crashes on all maps, WITH an error message: Mantle error in BF4 after UI patch - Album on Imgur
That said I have a solution that worked for me to solve crashes on Paracel Storm before the UI patch, but I haven't tested it afterwards so I don't know if it still works:
1. Install 16.8.3
2. Download Mantle DLL's from a newer driver, anything after 16.9.1 should work
3. Drop those DLL's into BF4's folder
4. Delete cache in "Documents/Battlefield 4" just to be safe
This fixed my crashes on Paracel Storm, but of course it's not ideal because you're forced to stay on old drivers. I've mostly moved on from BF4 since BF1 came out, but if I ever want to go back, I'd really, really like to use Mantle. Hopefully AMD will still devote some resources to keeping it running at least. It really makes a huge difference in multi-gpu setups, where BF4 can really tax the CPU.
Or better yet, make a Vulkan wrapper for Mantle? Not sure if that's possible.
Actually i ask for solution I du it the default things long long before my post !