Hello corona The R200 does not support registered/buffered/RDIMMs. You will need to use unregistered/unbuffered/UDIMMs in this server. That is the first thing that pops out at me as making this memory not work. Thanks
Hi all i have a new kit of Elpida 2GB 2Rx8 PC2-5300P-555 8GB Memory but if i put 8GB in the server the server bleeps and wont boot even whit one stick   i got the datasheet [URL]  Thanks for the support 
Memory Upgrade to 8gb Dell R200