Question Question about adding memory to PC

[ron2368]

For my current PC I have 2 x 8 of geil ddr4 2400 memory and have room for 2 more sticks. I want to add 2x8 but am not sure if I can add in a different brand or speed since I can't find this specific Geil memory for sale. I was looking at some Geil ddr4 3400 that I saw for sale.Thank you
The MB is

ASRock Z370M Pro4 LGA 1151​

 

[Tech Junky]

The average person wouldn't notice the difference in mismatched sets.

 

[Shmee]

If I were you, I would try to get same same timings/speed, but it doesn't need to be the same brand. Usually another 2x8GB kit is rated for DDR4 2400, same timings and voltage, you should be more safe.

 

[ron2368]

thank you

 

[In2Photos]

What is the price difference between 2x8 and 2x16? Maybe just replace the sticks you have with 2 more so you get the capacity increase and speed increase.