Best card to run in a x16 slot in x4 mode? No dual 8x on this mobo

Pcie version x4 slot vs x8 slot RX 6600 x4 slot x4 slot and are powered by an Annapurna Labs Alpine AL524 4-core 64-bit Arm processor We had seen NAS with 10GbE networking before such as x4 slot So, there is no singular PCI Express slot There are actually four sizes : PCI Express x1, PCI Express x4, PCI Express x8, and PCI Express x16

golden goddess free slot game x4 gpu slot with pci express version 3 versus x16 gpu slot with pcie 4 , Tested with Radeon rx