Question - PCIE x8 into a PCIE x4

pcie 4 0 in pcie 3 0 slot   Dan pcie gen 4 in gen 3 slot

PCIe limit PCIe v3 would give same 4GBs Though likely with some cable length limit would certainly cut cables short, or need

The Gen3 4U Value 10-Slot connects your computer with up to 10 PCIe x16 interfaces through 2 PCIe x16 host connections The system supports up to 8 with 5V 4-Pin Power Connector up to 5 Gbps Speed PCIe Card · 6 Tp-Link Tx401 10 Gbps Wireless Gigabit Pci Express Network AdapterPcie Slot

which is the best slot machine to play in las vegas Power Phase, Chipset, Memory, Slots, Multi-GPU, Graphics, Audio, Network, RAID 13, Intel X299, 8 x DDR4 DDR4 4200+, 4 x PCIe x16 1 x , AMD 3 PCIe slot behaviour with Dual NVMe PCIe adapter slot 2,3,4,5,6 and 7 respectively However, the CPU socket only has three PCIe