Each RAM SO-DIMM must not exceed the following maximum current limits on the +3 V supply:
Active: 1.2 A (maximum of 8 devices per bank, 150 mA per device)
Sleep: 12 mA (total for all banks)
The maximum current specified for active operation generally rules out the use of 4-bit-wide SDRAM devices in a RAM expansion module. Such a module would have 16 such devices per bank, and the 1.2 A maximum current would allow only about 75 mA per device. To stay within the current limits, RAM expansion modules should use only 8-bit or 16-bit SDRAM devices.