Mainboard for ThinkRD630 RD640 RD530 RD540 - SX52600RP (03X4428 / 03X4426 / 11014689 / 11014653)

Replacement mainboard compatible with ThinkRD630, RD640, RD530 and RD540 systems. This motherboard matches the following part numbers and SKUs: SX52600RP, 03X4428, 03X4426, 11014689 and 11014653. Offered as a direct-fit board for units requiring any of the listed identifiers—suitable for repairs, maintenance, or system restoration. Confirm your system model and part number before ordering to ensure compatibility.