This 8GB memory is 100% compatible with the Lenovo Flex System x240 8737 (E5-2600 processor). Our memory team will be happy to help you choose the right memory and configure your server.Technology1 CPU 12Slot2 CPU 24SlotMaximum RAM expansion according to number of CPU and number of memory slotsUDIMM ECC64GB RAM (8 x 8GB)128GB RAM (16 x 8GB)RDIMM192GB RAM (12 x 16GB)384GB RAM (24 x 16GB)LRDIMM384GB RAM (12 x 32GB)768GB RAM (24 x 32GB)Principles of memory configurationThere are 4 memory channels per CPU, each with 3 memory slots.ECC DIMM, Registered DIMM and Load Reduced LRDIMM memory modules must not be mixedWhen upgrading, you should therefore know which memories are already present or upgrade completely to RDIMM or LRDIMM memory.When using ECC UDIMM memory, only 2 of 3 memory slots per memory channel can be occupiedMemory slots for which no processor is available must not be fittedHigher memory frequencies may adapt to other memory clocks in the system. Higher memory frequencies may adapt to other memory clocks in the system environment and support correspondingly slower clock ratesThe low-voltage memories with 1.35V are clocked at 1.5V via the fallback option available in the memory when mixed with 1.5V memories. Memory configuration for good system performanceDistribute the memory evenly across the memory slots and evenly across the CPUsIf there is more than one CPU, the memory per CPU should be configured identically (mirrored to the other CPU).