We have a Dell PowerEdge R420, and it has a Intel Xeon E5-2400 CPU. It's only a 2U blade, and one x16 PCIe slot with x16 bandwidth, 3.0, half-length, full-height. Will something like the RX 550 or GT 1030 work? It needs to be compute capable version 3.0 and up for it work work with TensorFlow.