39Y6972 - IBM - Power Backplane Board for System x3550 39Y6972 - IBM - Power Backplane Board for System x3550 $69.38 $58.80
44W4899 - IBM - Power Backplane 3.5-inch for x3550 44W4899 - IBM - Power Backplane 3.5-inch for x3550 $89.03 $75.45
49Y4833 - IBM - 6-SAS Hdd Backplane for X3550m2 49Y4833 - IBM - 6-SAS Hdd Backplane for X3550m2 $141.25 $119.70
90Y5088 - IBM - 3.5-inch Hot-Pluggable Backplane for System x3550 M4 90Y5088 - IBM - 3.5-inch Hot-Pluggable Backplane for System x3550 M4 $138.51 $117.38