Pair 2 Crucial 4GB DDR3 1600 MHZ RAM

Aug 27, 2018
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Hello guys!
I have a pc with:
Intel Core I3 4170 3.7 GHZ
Motherboard:Asus H81M-K
Ram:Crucial 4GB DDR3 1600mhz
Crucial 2GB DDR3 1600mhz
HDD:1 TB
Graphics card:Asus AMD RADEON RX 460
and i wondered....can i replace the 2gb stick of ram with a Crucial 4GB DDR3 1600(the same as the first one) to have 8 GB?I've heard that some problems can appear and the combination could not work in some cases.But on the other side i know that it should work just fine because there are just
2 same sticks of ram.Please,tell me if this would work because i don't wan't to spend some money on an upgrade that doesn't work.
Thank you very much! <3 <3