This 16GB RAM is 100% compatible with Fujitsu D3030. Memory configuration: Our memory team is happy to assist you in choosing the right RAM and configuring your server. Technology GB / Number of Modules Total Maximum Capacity by Memory Technology UDIMM ECC 8GB RAM 6 48GB RDIMM 32GB RAM 9 288GB UDIMM ECC memory and RDIMM (Registered) server memory cannot be used together. Therefore, when upgrading, you should know which memory is already present or upgrade completely to RDIMM memory. Principles of memory configuration: The memory slots are organized in groups of three. Each group of three has a maximum of 2 slots for UDIMM ECC memory. Each group of three has a maximum of 2 slots for 4Rank RDIMM memory. The different groups of three slots do not need to have the same capacities. Only the memory slots where the respective CPU is present can be used. Memory configuration for good system performance: Distribute the memory evenly across the memory slots and evenly across the CPUs. With three identical memory modules per group of three slots, performance can be up to three times faster compared to populating the group of three slots with only one memory module. If more than one CPU is present, the memory should be identical (mirrored to the other CPU) per CPU.