Can anyone offer any help on this one

I recently inherited a company who runs a bunch of IBM Netfinity Servers which are getting fairly old now but are still more than capable of performing their required functions.

But of course IBM no longer has any info on these products and as they want them upgraded to the Dual Processors that they are capable of running as well as more RAM I’m wondering what is required to make the Dual Processor option work. Just plugging a known good CPU doesn’t work and while they required “Registered RAM” could any one tell me just how big a SD RAM can be installed on the Board?

Thanking you in anticipation of your many answers.

Col