Hello The maximum supported module is 2GB. www.dell.com/support/home/product-support/product/poweredge-1800/ Thanks
Hello,  I'm in the process of getting new sticks of memory for my Server PowerEdge 1800, I asked a friend of mine and he said that according to the manual you can only get a 2GB modules and the maximum capacity for the server is 12GB total.  My question is, can I get a stick of 4GB instead of 2*2GB? Can I get this part number X1564 (Dell 4 GB DDR2 SDRAM  400 MHz (PC2-3200))?  Regards, Sameh
PowerEdge 1800 memory upgrade