1 x pci express x16 slot running at x4 pciex4

According to PCIE Expresscard , a x1 card can be inserted into the x4, x8, and x16 connectors 15 This is referred to as up

I explain in this video what is PCIe x16 on the motherboard and its uses I also explain what

pcie 1 slot So your adaptec x4 card will run at x4 in a x16 slot It's a good sign the x1 card works, but still isnt proof the x4 will work Ideally for

pcie 4 m2 in pcie 3 slot Yes It will work fine It won't run quite as fast as it will in a 16x slot, but the performance penalty isn't 75 percent , it's usually