Complex sentence: An example is a × 16 slot that runs at × 4, which will accept any × 1, × 2, × 4, × 8, or × 16 card, but provides only × 4 speed.
Split into simpler sentences: An example is a × 16 slot that runs at × 4. This slot will accept any × 1, × 2, × 4, × 8, or × 16 card, but provides only × 4 speed.