嗯...那個...不好意思插個話

driverheaven和techreport都說R700是1GBx2，只有AnandTech講R700只有512MBx2

driverheaven的說法：
"In terms of memory we have 1 GB of GDDR5 on each side of the card and each RV770 GPU has access to its own gigabyte."

techreport的說法：
"Those chips are 1Gb each, so each GPU has a total of one gigabyte of memory to call its own."

AnadTech則是在表格裡面填上512MBx2