If so, the top slot likely runs at PCIe x16, meaning 16 data lanes, which is ideal for high-bandwidth add-ins like a graphics card.And if you have a second slot, it likely runs at PCIe x8. That ...
Multi-lane PCIe links bring the theoretical bandwidth up to 4 GByte/sec for X16 links. The actual bandwidth is lower by 5-20% due to link protocol ... For instance, such implementation may be ...