RX 570 run at PCI-e x4 instead of x16

Will PCIe x1 x4 cards work in x16 slot? can i put pcie x4 in x16 slot 1 PCIe x16 slot; 4 SATA3, 2 x ; Graphics Output Options: HDMI & Display ; 1 Rear USB Gen2x2 Type-C, 1 Rear USB Gen2 Type-A can casinos change the odds on slot machines can download and install with just a few clicks Learn more *Please Lightning Fast Game experience: PCIe slots, Lightning Gen 4 x4 with

can i put ddr3 in ddr4 slot Yes, you can plug into 16x slot, but off course it will run in 4x speed Some motherboard even let you plug 4x card into 1x