IBM System x3300 M4 Installation And Service Manual page 343

12. For server models with eight 3.5-inch hot-swap hard disk drives with the
redundant power supply and the ServeRAID adapter:
Note: It is necessary to use two 2*8 pins to 2*7 pins power cables for these
server models come with a redundant power supply.
13. For server models with four 3.5-inch simple-swap hard disk drives with the
fixed power supply:
Note: It is necessary to use one 2*7 pins to 2*8 pins power cables for these
server models come with the fixed power supply.
Chapter 6. Removing and replacing components
325