显存带宽是指显示芯片与显存之间的数据传输速率，它以字节/秒为单位。显存带宽是决定显卡性能和速度最重要的因素之一。
在显卡工作过程中，Z缓冲器、帧缓冲器和纹理缓冲器都会大幅占用显存带宽资源。
The course of their work in graphics, Z buffer, frame buffer and texture buffer memory bandwidth will be substantially occupied resources.
另外，为了尽可能高效的利用显存的带宽和AGP总线带宽，应该极力避免载入冗余数据。
This is necessary to avoid loading redundant data and therefore to use the video memory bandwidth and that of the AGP bus as efficiently as possible.
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