SPARC M8 and SPARC M7 servers support the use of only PCIe x16 hot-plug card carriers, which are physically labeled with "x16 CAR" on the faceplate. PCIe x8 card carriers from earlier generations of Oracle servers, which are labeled with "CAR" on the faceplate, are not supported for use in SPARC M8 and M7 servers. PCIe x8 and PCIe x16 cards are supported for use in these servers.