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GDDR

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Hynix 256M gDDR SDRAM

GDDR是Graphics Double Data Rate的缩写,为显存的一种,GDDR是为了设计高端显卡而特别设计的高性能DDR存储器规格,其有专属的工作频率、时脉电压,因此与市面上标准的DDR存储器有所差异,与普通DDR内存不同且不能共享。一般它比主内存中使用的普通DDR存储器时钟频率更高,发热量更小,所以更适合搭配高端显示晶片,一般来说,GDDR的带宽相比DDR会更大,但是读写延迟会高于DDR。

发展历史

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当应用程式越来越多要进行3D显示及演算时,频繁地读取在显卡中的SDRAMSGRAM保存的连续画面图像数据的速度开始不能满足需求,人们研发了GDDR,它是为了代替旧式显存的不足而出现。开始时第一代GDDR只是普通DDR的稍微改进版,但也比旧式显存要快的多。

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GDDR
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