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PCI Express Graphics Cards

Sneak Preview: Intel Alderwood/Grantsdale Chipsets
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All PCI Express graphics cards are connected via x16 PCI Express slot. The resulting bandwidth is 4 GB/s upstream as well as downstream, which easily surpasses the conventional AGP by a factor of four. It's still difficult to predict what this will mean in practice. However, we will be looking at this topic more closely in a separate article.

Confusion Through Compatibility?

The upward and downward compatibility with different PCI Express speeds could easily cause lots of confusion because the mechanical structure of a PCI Express connector reveals very little about the PCI Express speed at which it might run. For example, it will be possible to plug a x8 PCI Express card (in the later generations) into a faster x16 slot, while in reality the card only runs with four lines, i.e. x4 PCI Express.

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