In a Q&A session on Reddit, Nvidia representative affirmed that the difference in performance between PCIe 3.0 and PCIe 4.0 is very little. While a PCIe 4.0 system is preferred, you can still plug the GPU to a PCIe 3.0 x16 slot and get almost the same performance. With the new Ampere GPUs supporting PCIe 4.0, most users are left wondering whether one needs PCIe 4.0 to get the best performance from the RTX 30 series. PCIe 4.0 has twice the throughput of PCIe 3.0, which leads to quick data transfers and reduced latency. PCIe 4.0 is the latest generation of the PCI Express standard that allows your PC to communicate with several expansion cards, including GPUs and M.2 solid-state drives. What is PCIe 4.0? Do you need it for Ampere builds?
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