Welcome to the forums, newcomer!
Parse the links to the two pairs. In retrospect, you're advised to work with the same sticks of ram, or at best the same ram kit to avoid instability. The reasoning behind that is not every stick of ram from every brand will be made off the same assembly line. Discrepancies in said manufacturing processes can and will lead to instabilities in the sticks of ram.
Also, please parse the specs to your build like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Include the age of the PSU, apart from it's make and model. Then parse the BIOS version on your motherboard.