The wccftech article is a joke. This howler,
And he didn't mean Polaris 11 there, since in the very next line he says,
Finally he links C99x board to dual Polaris 10 despite the fact that the second digit identifies the chip used.
Zauba shipping manifests for Hawaii were C676, C675 and C673 for xt, pro and x2 respectively and more recently,
C882 - Fiji nano
C888 - Fiji x2 (Gemini)
C880 - Fiji XT
So C98x and C99x are definitely not the same chip, C99x could be a polaris 10 board if C99x was for Polaris 10 chips but that isn't clear either. He could've linked the new prices on zauba for the cards,