Can I mix these RAM modules?

[man5000000]

Hi! I have 2 8GB DDR3L Ram Modules currently installed in my PC. This is the link to the module, but I have a 16 GB 2 Module kit.
http://www.amazon.com/gp/product/B00A14ZT8I?colid=230G5OZO41GX5&coliid=I1D4L8N34506IY&psc=1&ref_=wl_it_dp_o_pd_nS_ttl
I have an extra 8GB DDR3 Ram stick with the same speed and from the same series. Here is a link to that one
http://www.amazon.com/Crucial-Ballistix-PC3-12800-BLS2KIT4G3D1609DS1S00-BLS2CP4G3D1609DS1S00/dp/B006WAGGUK/ref=sr_1_1?s=electronics&ie=UTF8&qid=1438820767&sr=1-1&keywords=crucial+ballistic+sport+8gb
Can I add this module to my Motherboard at the same time as the others? Would it be recommended to buy another of the same modules (so I would have 2 and 2?) to install all at once in my pc?
Thank you!

 

[Tradesman1]

There's no guarantees when mixing DRAM the sticks might play might not, as long as you have the stick, give it a try. Let us know what happens if any problems we can try voltage and/or timing adjustments 😉