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First I looked at ASrocks compatibility list, and the results were very underwhelming. Perhaps because they have not bothered to test many newer modules? You can see the page here (Notice the "Notes" section at the top of the page). "Note #6" is a bit confusing to me, it states 2000+ (eg. 2133) modules will run at 2000Mhz when OC. Seems to me that would indicate they are "under-clocked" and not OC.

Then I went to manufacturer sites to see what they had listed for the Fatality 990FX Pro. "G.Skill, Crucial, and Corsair" are the only three I found with options to find compatible RAM (Team-Group does not seem to have this option on there site). Corsair showed zero results. Listed below are the results I found. I am looking for 16GB-2x8GB kits.

Corsair: http://www2.corsair.com/configurator/new_configurator_product_results.aspx?sc=&id=2313125 (I see no option for 16GB-2x8GB kits)

G.Skill: http://www.gskill.com/en/configurator?manu=52&chip=42&model=559 (Please scroll down to the 1866 kits) I see 3 kits here.

Crucial: http://www.crucial.com/usa/en/compatible-upgrade-for//fatal1ty-990fx-professional (Please select "Module Size-16GB 2x8, Kit Quantity-2, PC Speed-14900) I see 3 kits here as well.

Seems there are only 6 options total for 1866Mhz 16GB-2x8GB kits for my MB. And I still am not certain if I can run 2000Mhz+ modules at speeds above 2000Mhz. Perhaps with manual FSB settings in my bios I can get 2000+Mhz modules to run at their rated speed, and then lower my multi to maintain any desired CPU clock? However there were no listed compatible 2000+Mhz modules listed on any of the above manufacturer sites. Perhaps this is only because on my MB the FSB would need to be increased?
 

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There is no need to look at a memory QVL on the motherboard site. If it's DDR3 it should work 99.9% of the time. Since the memory controller is on the processor, that's the biggest factor to consider. And your Vishera processor can definitely handle 1866mhz. You only run into problems trying to run super high frequency memory (like 2400mhz+) because the CPU memory controller might have trouble with it and you will need to increase CPU-NB voltage.
 
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