1 x pcie 3 0 x16 slot ✓ NVIDIA T1000 Graphic Card - 8 GB GDDR6 - LP- PCIe x16

It doesn't matter, the cards will work normally But yes there is a single AM3+ motherboard with PCI-E : The ASUS Sabertooth 990FX Gen3 1 x pcie 3 0 x16 slot,Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4 The thing is, only one of the PCIe slot is x16, the other one is x4 I

+1 Also cards must support being inserted into a smaller slot than they're designed for Some slots 1 x pcie 3 0 x16 slot,PCIe cards can always operate in PCIe slots with the same or more lanes than the card For example, an x8 card can operate in a slot with x8, x16, or x32 lanes

1 x pcie 3 0 x16 slot,FEATURES · PCIe x8 Gen3 expansion backplane · 1x PCIe x8 Gen expansion slot · 1x PCIe x8 Gen target slot · 12V DC power input · SKU: OSS-PCIe3-BP-440