Cas latency doesn’t matter as much as the ram frequency does. For ryzen 3000, 3200mhz or 3600 mhz with cl16-cl18 will be fine. CL18 by itself doesn’t mean anything, you need the RAM speed number too in order to calculate the actual latency.

3200MHz CL14 RAM would be a "better" choice over 3600MHz CL16. While Ryzen does like fast RAM, its only to a point. At 3200MHz the speed gain itself likely wont be significant enough to warrant the increase in latency. Not essential, but whatever you get, don’t go lower than 3200 . . . Read more

They match on chipset compatibility and voltage power, and CAS latency alone does not make much of a difference. And even though a 3600 MHz RAM is obviously faster than a 3200 MHz one, storage capacity triumphs over speed when it comes to improving efficiency and performance.

If you are building a new amd based system 3000 mhz will be the minimum ram speed you should go with,if you can afford any ram beyond that speed it would even be better(although not much) in gaming,as amd’s infinity fabric architecture feeds off high speed ram with low latencies.

If you’re building a low-end Ryzen APU gaming PC, DDR4-3200 is great, because integrated graphics are very dependent on memory bandwidth, and DDR4–3200 is the highest frequency that the Ryzen 2000 and Ryzen 3000 APUs can reliably handle (some can go a bit higher, but only if you’re lucky).

For us 3,200MHz memory with the common timings of 16-18-18 should be considered the baseline for all but budget systems. The only reason a gamer should go with very fast 4,000MHz+ RAM is if you’re running a high spec Intel system and you’re into competitive first person shooter games on . . . Read more

Best 16GB (2x8GB) DDR4 Memory Kits for Intel Systems Memory Kit Score Data Rate Silicon Power Xpower Zenith 852.37 DDR4-3200 Predator Talos DDR4-3600 852.22 DDR4-3600 PNY XLR8 Gaming Epic-X RGB 848.69 DDR4-3200 Lexar UDIMM 835.21 DDR4-2666 •Dec 9, 2021

This DDR4 RAM kit has a memory size of 16 GB (2 x 8 GB) that runs very fast at 3600 MHz and has excellent performance. Usually, high speeds involve some heating but thanks to the aluminum heat spreader of these modules you won’t have to worry about it. TEAMGROUP . . . Read more

DDR4 – This means Double Data Rate 4 Synchronous Dynamic Random-Access Memory or DDR4 SDRAM or DDR4 for short meaning, it can carry 2 signals per cycle (per Hz) so a DDR4–3200 means it can carry up to 25600 MB/s of data, much faster than your SSD or your storage . . . Read more

If you are going for an Intel based system, then 2400MHz will be enough. However, if you are buying an AMD Ryzen 3000 processor, than the 3000MHz RAM will go a long way in improving the performance. 2400MHz RAM might be fine, but this is mainstream.