Question RAM Setups with different Specs, will it be okay or will it be a problem?

Feb 8, 2019
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I have 16gb ram setup {4x4gb}, those are have the same brand from Geil, but have different specs.. 2 sticks are 2400Mhz CL 16 and the other 2 are 2666Mhz CL 17, and it runs smoothly on my rig for about 6 months currently, but i always wondering.. will it be lasts for a long time or will it causes some issues in a later time?
 
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