Changing tRAS to 40 makes the system unstable

So I’m following this DDR4 guide – https://github.com/integralfx/MemTestHelper/blob/oc-guide/DDR4%20OC%20Guide.md

And it says this:

> Set primary timings to 16-20-20-40 (tCL-tRCD-tRP-tRAS) and tCWL to 16.

I set those settings and PC became very unstable, crashing constantly. So I thought I’ll try to isolate the issue and so I started with tRAS and it after 1 hour of playing rocket league, when I tabbed out of the game and then back, game crashed. This never happens otherwise so I’m blaming tRAS here

How should I proceed? Is it too important to start with loose timings? I didn’t know even those can cause crashes. I am thinking of getting as close as possible to the loose timings for each of the latencies and from there start increasing frequency

[My current zentimings](https://i.imgur.com/lZAs6lm.png)

My RAM – https://www.amazon.com.au/Viper-Steel-4400MHz-Performance-Memory/dp/B07KXLFDL6