Gente, enconre esto.. les dejo un quote en ingles…
"The final speeds won't be known until middle of April but ATI can get R600 works at quite high 750 to 800 MHz. We are talking about the core speed.
We already said that GDDR3 has the priority and we again confirmed that there won't be any 65 nanometre R600 part.
The new / old R600 still needs a new driver to get it works better but from what we hear it still needs a lot of tweaking. The official launch is still scheduled for May and late April might be the date for NDA presentation"