ESXi 5.5 will have all the necessary drivers native for a server this old. The 8GB was probably the maximum Dell sold that unit with, but as it's basically a PowerEdge 1950, it can support much more memory. The problem is that it uses fully buffered DDR2 memory, which tends to be fairly expensive (compared to the registered DDR3 memory that more modern servers use) unless you buy it second hand on Ebay or so.
Hi, Is it possible to install ESXi 5.5 on an NX1950? I'm thinking of drivers.. And is 8GB really the max on this server?
ESXi on NX1950