PHS-memory RAM suitable for Fujitsu Primergy CX420 S1

This 4GB RAM is 100% compatible with the Fujitsu Primergy CX420 S1. What memory configuration is possible? Our memory team is happy to assist you in choosing the right RAM and configuring your server.

Technology:
1 CPU: 12 slots
2 CPUs: 24 slots

Maximum RAM expansion based on the number of CPUs and memory slots:

• UDIMM ECC:
• 32GB RAM (8 x 4GB)
• 64GB RAM (16 x 4GB)
• RDIMM:
• 128GB RAM (8 x 16GB)
• 256GB RAM (16 x 16GB)

Principles of memory configuration:
Each CPU has 4 memory channels with 2 memory slots each. UDIMM ECC memory and RDIMM (Registered) server memory cannot be used together. Therefore, when upgrading, you should know what memory is already present or upgrade entirely to RDIMM. Memory slots without a processor present must not be populated. Higher memory frequencies may adapt to other memory clock rates in the system environment and support correspondingly slower clock rates. Low Voltage memory with 1.35V will be clocked at 1.5V when mixed with 1.5V memory due to the fallback option available in the memory.

Memory configuration for good system performance:
Distribute the memory evenly across the memory slots and evenly across the CPUs. If more than one CPU is present, the memory should be configured identically (mirrored to the other CPU) per CPU.