PRO H610M-E DDR4 Motherboard M-ATX

PCIe riser #1: Configured for systems with one or two processors that are installed, it allows for the 4-port 10 Gbps Ethernet Adapter and an additional PCIe

A PCIe slot will not bottleneck the card But what CPU are you running? That might be a different story 6162021 EVGA_JacobF Nope

pcie 8x slot As Zef said, PCI-e is backwards compatible You can put a PCI-e GPU into a slot or a PCI-e GPU into a slot, it'll just run

pcie 50 x16 slot The first one is 16x electrically, but this will automatically drop down to 8x if a card is installed in the second slot The second slot is 8x electrically