On this pageThinkSystem SR665 V3/SR655 V3 12x3.5" Expander Backplane Option KitPN4XH7A86133ThinkSystem 2U V3 12x3.5" Expander Backplane Option Kit | Lenovo Server OptionsSee this document for information about the ThinkSystem 2U V3 12x3.5" Expander Backplane Option Kit.Learn MoreThinkSystemSR650 V3OS Support MatrixOS IndependentOS IndependentThinkSystemSR655 V3OS Support MatrixOS IndependentOS IndependentThinkSystemSR665 V3OS Support MatrixOS IndependentOS IndependentGive feedback