The MB should have the pcie 3.0X16, because the PC has i5-6400. But keep in mind, 1) the OEM PC will have the lower wattage PSU, you need to buy other PSU. 2) Make sure the PC will support the low profile GPU or regular size GPU, or even the single slot or dual-slot GPU too. 3) Check the linker for more info for adding the non-OEM GPU. https://nvidia.custhelp.com/app/ans...t-graphics-card-into-a-certified-windows-8-pc