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GDDR4 (Graphics Double Data Rate 4)是一款显卡专用记忆体,由JEDEC制定。GDDR4基于DDR3,用来取代基于DDR2GDDR3[1][2]

GDDR4推出一年便被GDDR5取代了。只有ATi曾经推出采用GDDR4的显卡,其他厂商均由GDDR3直接跳到GDDR5。

技术

  • 使用数据总线转位技术 (Data Bus Inversion)
  • 预取由4位元增加到8位元 (跟DDR3相同)

参考文献

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