Finding Compatible RAM

[sparkski]

Bought a 2x8 kit of G.Skill Trident Z at 3600 speed originally (linked below)

https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232764?Item=N82E16820232764

 

What do I have to look for to make sure a new kit is compatible?

Do I have to have the same timings / voltage / latency / speed, or will anything close work?

 

The reason I ask is because there are cheaper kits at the same speed but with different timings and such. 

https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232917?Item=N82E16820232917&Description=G.SKILL TridentZ RGB 16GB (2 x 8GB) 3600&cm_re=G.SKILL_TridentZ_RGB_16GB_(2_x_8GB)_3600-_-20-232-917-_-Product

https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232728?Item=N82E16820232728&Description=G.SKILL TridentZ RGB 16GB (2 x 8GB) 3600&cm_re=G.SKILL_TridentZ_RGB_16GB_(2_x_8GB)_3600-_-20-232-728-_-Product

[sparkski]

bump

i hope this isn't illegal