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3.0 x16到1.1 x4:HD7970、GTX680九种PCI-E模式性能对比

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Old 07-05-2012, 05:32 PM
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Default 3.0 x16到1.1 x4:HD7970、GTX680九种PCI-E模式性能对比

Ivy Bridge、Radeon HD 7000、GeForce GTX 680联手带来了完整的PCI-E 3.0平台,而不同PCI-E模式对于显卡性能的影响也是个古老的话题了。TechPowerUp近日就组织了一次专门的测试,考察了Radeon HD 7970、GeForce GTX 680各自在九种不同PCI-E标准、带宽模式下的性能。测试中,每块卡都分别在PCI-E x16、x8、x4模式下运行,而且每种模式都包括PCI-E 3.0、2.0、1.1三种标准版本。三者的x1单向带宽分别为1GB/s、512MB/s、256MB/s,x16双向带宽就是32GB/s、16GB/s、8GB/s。主板是华硕玩家国度ROG Maximus V GENE,可以在BIOS里任意设定PCI-E 3.0/2.0/1.1标准版本,而为了区分不同带宽模式,直接用普通的塑料胶带粘住部分PCI-E针脚。
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