I installed 4 1GB RAM chips in a used Gateway e6300, expecting a functional 4GB machine. The system beeped and failed to boot. So I tried taking out two of the chips - Two of the slots have white tabs (i.e., that hold the chip in place) at the sides and the other two have black tabs; so I left a chip in each white-tabbed slot and took the chips out of the black-tabbed slots. (The same-color-tabbed slots are not next to each other - i.e., they alternate.) The system booted with this configuration, with the expected 2GB of RAM. (The 4 chips are all the same: 1GB DDDR2-533 PC2-4200 Non-ECC, ...)
After a bit of searching, finding the user guide and documentation of the specs (http://www.cnet.com/products/gateway-e-6300/specs/), I found no indication of the max RAM this system is supposed to support. (It may be out there, but I didn't find it.)
So, my questions are: How much maximum RAM should the e6300 support? And if it does support 4GB, should my original 4X1GB configuration have worked (implying that the problem was a defective slot/motherboard, incorrect installation, or bad chip(s))? If this config. doesn't work but 4GB is supported, what's the configuration for 4GB - Is it 2X2GB?