Could someone help me with checking these ram timings if they're good?

[kyshiro]

Hello, i have an motherboard (Asrock 970 extreme3 R2.0) which supports memory up to 2100+mhz (apperently, i don't even know what that "+" means) and i've got a memory kit which has 2400mhz on it(Kingston HyperX PREDATOR 8GB (2x4GB) or KHX24C11T2K2/8X ) and i want to make it stay constantly to 2100mhz. Here's the question i've done "some" research for the timings (because the xmp profiles don't work and i have noo ideea why) and i want to ask if they're good or not and if they're not could anybody help me with it ? (I'm sorry if my english lacks, english isn't my main language and i don't know if what i sad has any coherence) p.s. (The excel file i've found it on internet searching ram timings calculator i don't know if it's any good)

[xg32]

short answer no, for 2100, just use the timings under 1066 on the table, i'd try 11 11 11 28 if u wanna tighten the timings, and go from there if u wanna go for further oc.

[kyshiro]

3 hours ago, xg32 said:

short answer no, for 2100, just use the timings under 1066 on the table, i'd try 11 11 11 28 if u wanna tighten the timings, and go from there if u wanna go for further oc.

The thing is that i don't know anything about ram timings, that's why i wanted to ask here . There are many categories and idk if i have to change them or not or just change the first four categories and to what's the benefit of doing so.