Ram Cas vs MHz question

[Ektelion]

Intel i7 8700k
RTX 2080 Ti
Asus maximus X Hero z370


Corsair Vengeance Pro RGB - 3600mhz Cas 18 timings 19-19-39 out of the box 
G.Skill Trident Z - 3200 mhz Cas 14 timings 14-14-34 out of the box

Both are confirmed Samsung b-dies so what's gonna perform better? is it the same thing?

 

Gaming wise
Multi tasking wise
all in one performing.

[Guest]

Depends on the platform.

Intel or AMD

[TetraSky]

The 3200 Mhz would perform better due to tighter timing.

But it's the difference between 8.75 ns and 10.00 ns. You wouldn't even notice it, ever, outside of benchmarks.

 

https://en.wikipedia.org/wiki/CAS_latency

 

The equation is as follow ( CAS / Command Rate ) * 1000 
Which gives you (18 / 1800)*1000=10
and (14 / 1600)*1000=8.75

 

(Command rate is literally just half of the speed advertised on the stick. 1600 for 3200 MHz and 1800 for 3600 MHz)

[Ektelion]

1 minute ago, ShrimpBrime said:

Depends on the platform.

Intel or AMD

i was almost certain i was missing something and i didn't know what, fixed it, its Intel.

[TetraSky]

1 minute ago, Ektelion said:

i was almost certain i was missing something and i didn't know what, fixed it, its Intel.

Then it literally doesn't matter. Intel CPU don't care for faster RAM. You won't have better gaming performances or anything.

[Ektelion]

so what's the point of buying higher mhz ram if you have intel desktop?

you can just go for the cheapest and still get more or less same results?

[Ektelion]

actually i found a detailed article on reddit on google about this.

It looks like the Corsair ones have a better headroom for overclocking potential, that's pretty much it i guess.
 

 

[FraktalU]

there is this german guy who ran a bunch of benchmarks with different clock speed and timing DDR4-RAM.

 

https://www.youtube.com/watch?v=m5Urz0J1r5A - german only

 

he did it with an 9900k and compared it with an R7 2700x at the time.

 

the conclusion he had was, that the scaling with intel gets worse when the timings rise.

 

he didn't test 3200MHz CL14 but they should be better than the 3600MHz CL18 kit, as the timings are better.

 

in the end between 3200MHz and 3600MHz there is about a 2% difference in performance