Xbox One rumors point to a higher clock speed, but doubtful on increase in RAM

[Scoobes]

sales2099 said:
clock speed? why would we care about this?

Better performance in games and more stable frame-rates.

Overclocking on a similar-ish card:

http://www.guru3d.com/articles_pages/his_radeon_hd_7770_ghz_edition_review,21.html