AMD unveils 'Mantle' API to optimize GPU performance - Debute with BF4

[fatslob-:O]

Solid-Stark said:
Can Nvidia support this API. Isn't this API tied to AMD's GCN architecture, hence optimization across all GCN GPU's?

This whole idea seems conflicting to me. It claims to be open source yet it's meant for GCN so my idea about this api is that it doesn't exclusively use every GCN instruction sets but it does expose the hardware features more easily than say direct x.