The 68000 machines take a while to do their memory test. My 512Ke didn't take very long, since it was only 512k. But, my Plus (swapped the Plus board and shell over to the 512Ke's chassis, so I could use it, since the analog board has issues on the Plus' chassis) takes a while. As do both of my SE's. All three of them are maxed out, RAM-wise.
-J
-J