Prior to purchasing memory for a replacement or upgrade, check with your manufacturer or user manual to ensure the type and maximum allowed amount. Per the Spec Guide - this ProOne 600 G1 supports up to 16GB of DDR3-SDRAM.

DDR3-SDRAM SODIMMs = double data rate 3 synchronous dynamic random access memory; small outline dual inline memory modules.

SODIMMs for this machine must be: industry-standard 204-pin; unbuffered non-ECC PC3-10600 DDR3-1600 MHz-compliant; 1.5 volt DDR3-SDRAM SODIMMs. Please see The HP ProOne spec guide for further information.

This computer can support single- and double- sided SODIMMs constructed with x8 and x16 SDRAMs. The system will not operate properly if you install unsupported SODIMM memory.