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Understanding PCI Express Technology
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- What is PCI Express
- PCI Express is a high-speed interface standard for connecting hardware to motherboards
- It enables connections between expansion cards, graphics cards, and storage devices
- PCIe Slots and Lanes
- Common slots include x1, x4, x8, and x16 with increasing pin counts
- Each slot has multiple lanes that cannot be shared between devices
- PCIe cards can fit in any slot, but not vice versa
- PCIe Versions and Speeds
- Each new version doubles bandwidth from previous one
- Current version PCIe 6.0 delivers 7.56 GB/s per lane
- PCIe 7.0 expected to launch in 2025 with 15.13 GB/s per lane
- Current Availability
- PCIe 5.0 is fastest for home computers
- Only available on AMD AM5 and Intel 12th Gen motherboards
- Most consumer graphics cards work on PCIe 4.0 or older
- Graphics Card Performance
- PCIe version doesn't directly affect graphics card performance
- Modern cards use dedicated RAM for rendering
- Graphics memory is faster than system RAM for rendering