Upgrading RAM with different speed

Ripkon

Prominent
Apr 17, 2017
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The ram im currently using is discontinued CMY8GX3M2B2133C9R 2133 Timing 9-11-11-31. Im currently running that ram 8gb. Im wanting to bump it up to 16gb. I found this set on eBay CMY8GX3M2A1866C9 1866 Timming 9-10-9-27. Could i set the faster Ram 2133 to match the timings and speed to match the slower 1866? Thanks for the help.
Or would CMY8GX3M2A2400C11R 11-13-13-31 be a better option.

Maybe I should just buy a new 16gb set?