Reballed IC chip for Xbox 360 Slim South Bridge KSB X850744-002/004 45nm | ZedLabz
Xbox 360 Slim Trinity Chips | Ideias
South Bridge X861949-007 X861949 007 KSB Microsoft Xbox One S and One X 5903981907007 | eBay
Xbox 360 Southbridge chip reattaching - YouTube
Xbox 360 BGA Southbridge Chip Nudge Test and Removal - YouTube
Cleaning out what I thought was a standard "Trinity" model slim and find this oddity, it is not a dev unit and appears to be a stock machine. : r/ xbox360
XBOX 360 South Bridge KSB X850744-00 for Trinity | eBay