I want to upgrade an older pc that's using DDR3. The CPUZ app lists the memory as PC310700 (667MHz), Would this be compatible with memory listed as 1333MHz DDR3 CL9 DIMM? If that's not compatible then what should I look for?
Go to the crucial website and run the memory scanner tool. It will list compatible memory, what you currently have and how much you can upgrade to uk.crucial.com - System scanner