http://www.asrock.com/mb/AMD/Fatal1ty%20X370%20Professional%20Gaming/#SpecificationI am somewhat bit lost on figuring out which memory that motherboard does support.On one lines it say - Supports DDR4 3200+(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-buffered memory*I have a quick installation guide booklet that say the same thing about 3200+(OC).Yet the following table only list MHZ up to 2667. I may be misreading the table.I talked to the computer department manager at Fry's Electronic (local DIY store for PC). He said go for 3000 MHZ because that is the motherboard clock rate.I went to G.SKill website RAM configurator it only shows support for 2133 MHZ to 2400 MHZ for x370 pro gaming MB.So my question is the 3200 listed overclocked to THIS amount or by default at 3200 and can overclock above that?
ASROCK Fatal1ty Motherboard X370: Memory support
memory
Your motherboard can run any of the listed RAM speeds, but the extra speed will not be utilised if you do not use Extreme Memory Profile (XMP), leaving your more expensive purchase of faster RAM a useless investment. Due to this, If you are not thinking of modifying your BIOS settings, I would recommend choosing which ever speed of RAM is the least expensive in the range/brand you are looking at. For example, Corsair Dominator Platinum 2400Mhz is actually more expensive p/gb than 3000Mhz, even though some of the customers of the 3000Mhz product won't use the XMP option, the price is better because uninformed PC enthusiasts buy more of the faster RAM, as it seems more beneficial.The answer to your question is that the RAM is clocked at the speed listed, but to take advantage of that speed, you will need to enable the XMP option in your BIOS menu. OC means that the memory controller on the motherboard is overclocked when using 2933 or faster RAM, such as the 3200Mhz products.