ATI Radeon HD 4000 Series discussion

[hurleybird]

AS noted in the pic above, clamshell only allows for doubling the buffer size. You could run into page conflicts when two memory controllers each address the same pcs of GDDR5.

Perhaps, but you have no way of knowing if ATI has found away around that problem. This info certainly adds weight to the rumors of the two RV770s of R700 communicating to each other through memory though.