running 4gb 1333mhz 1.5v and 4gb 1600mhz 1.35v together is it safe?

game-lover

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Jul 30, 2012
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hi guys so i have been using 2 ram sticks of 4gb with the total of 8gb one is pc3-10700 667mhz,1.5v and the other is pc3-12800 800mhz,1.35v and together they are both running at 1333 dual channel and i got all this information from cpu-z and bios respectively.
so my question is,is it okay to run them together or should i change the other one and get same stick as the first one because of voltage and frequency difference? i bought them used and i have been using them both together for 2 weeks without any issues but i dont want to damage any components of my pc like cpu or gpu so what should i do? any help would be appreciated and sorry for long question
 
Solution
well one will be running at lower voltage than spec --ie 1.35v instead of 1.5v

and if it hasnt crashed or bluescreened you in 2 weeks see no problem