Memory Information
	RAM Speed SIMM type On Board RAM Number of SIMM Slots Supported sizes in MB Maximum RAM Virtual Memory On Board VRAM Number of VRAM slots	150ns 30 pin none 4 .256, 1 4MB no none none

Notes

The Macintosh SE comes with 1MB installed via four 256k SIMMs. Using four 1MB SIMMs, a maximum of 4MB is possible. Remember the highest density SIMMs must be installed in Slot 1 and 2 first. There are two different logic board configurations for the SE, one with a jumper and one with a resistor to identify the memory level installed. The RAM is installed differently depending upon what logic board you have. If you have the jumper logic board, your possible configurations are 1MB, 2MB, 2.5MB and 4MB with the highest density SIMMs being installed in the front two banks first (3 & 4). A 2.5MB configuration on a Jumpered logic board has a 1MB SIMM in positions 3 and 4 and a 256K SIMM in position 1 and 2. NOTE: IF THE LOGIC BOARD HAS A RESISTOR, THE SIMM PLACEMENT WILL BE REVERSED. The Jumper must be removed or the resistor clipped for a 2.5MB configuration. Place the Jumper on one pin so it will not be lost. Clip one lead of the resistor and move it out of the way so it can be reinstalled if necessary.