Normally DDR5 graphics cards are of PCIe 3.0 or even PCIe 2.0 in some cases. PCIe 3.0 is straightforward compatible with PCIe 2.0. PCIe 2.0 is enough to handle PCIe 3.0 graphics cards. No performance loss, No lags, that's all. Are you want to say PCIe 2.0?