What computer is this for? Is it one that you built or purchased? Is it from a system integrator or a large box OEM? The motherboard and CPU play a big role in ram compatibility, can you post those tabs from CPU-z?
SPD is the name of a chip on the memory module that stores different pre-set speeds. Some of those will be enabled automatically when inserted into the board, called JDEC. Think of these as the default settings. Your memory appears to be running a JDEC specs, but posting the SPD tab from CPU-Z will confirm. The numbers you see advertised when shopping for ram are called XMP. These speeds and timing allow you to run the memory at rated speed that are faster than default, but they are not compatible with every system. Without knowing more about your system we can't tell you what memory to buy.