Why Asus Pro WS X570-ACE not working with 3 GPUs? Code 43

Yes, PCIe standards are thankfully backwards compatible, meaning that a PCIe device will work in a PCIe slot, but it will only be able to reach PCIe

I used a Thermaltake PCIE riser last night, with GPU #3 in the PCIE3 slot and it worked but at PCIE 3 x4 …instead of x8, but after

pcie slot size The board has one PCIe slot but the slots are PCIe You can still use the PCIe SSD in the PCIe NVMe slot but max speeds will

pcie 30 x4 slot PCIe 's throughput is 1GB per second per lane, providing an overall data transfer rate or bandwidth of up to 32GBs total PCIe doubles