RAM how much does True latency differences matter?

[Minibeau]

So I am planning to upgrade my pc to the new Ryzen 9 5950X, but while looking at a 32 gb kit of ram(2*16gb), I noticed something called True latency. The kits i am looking at are all the same speed(3600), so i was wondering why one kit has a lower true latency than another kit.

[Nerdom]

As far as I know true latency = CAS latency

 

CAS latency (represented as CLx, x being a number), represents how fast data is available from your RAM after it's requested. It's different than frequency, but both have effects on the perceived/calculated "speed" of your RAM.

 

Lower/"tighter" CAS latency is desirable.

 

 

 

[Grabhanem]

Just now, Nerdom said:

As far as I know true latency = CAS latency

 

CAS latency (represented as CLx, x being a number), represents how fast data is available from your RAM after it's requested. It's different than frequency, but both have effects on the perceived/calculated "speed" of your RAM.

 

Lower/"tighter" CAS latency is desirable.

Basically yes-- I'd guess the "true latency" is frequency per CAS, which is a pretty good measurement of the actual memory latency:

[Minibeau]

7 minutes ago, Nerdom said:

As far as I know true latency = CAS latency

 

CAS latency (represented as CLx, x being a number), represents how fast data is available from your RAM after it's requested. It's different than frequency, but both have effects on the perceived/calculated "speed" of your RAM.

 

Lower/"tighter" CAS latency is desirable.

 

 

 

Thanks for the response. One of the kits is CL 17, the other one is at CL 18. Don't know if i would really notice a difference between those 2. Here are the 2 kits I am looking at
https://www.gskill.com/product/165/168/1536218671/F4-3600C17D-32GTZKWTrident-ZDDR4-3600MHz-CL17-19-19-39-1.35V32GB-(2x16GB)
https://www.corsair.com/us/en/Categories/Products/Memory/VENGEANCE-LPX/p/CMK32GX4M2D3600C18

there is about a 10 euro difference where i am from between these 2, the G. skill one is the more expesive one

[Grabhanem]

Just now, Minibeau said:

Thanks for the response. One of the kits is CL 17, the other one is at CL 18. Don't know if i would really notice a difference between those 2. Here are the 2 kits I am looking at
https://www.gskill.com/product/165/168/1536218671/F4-3600C17D-32GTZKWTrident-ZDDR4-3600MHz-CL17-19-19-39-1.35V32GB-(2x16GB)
https://www.corsair.com/us/en/Categories/Products/Memory/VENGEANCE-LPX/p/CMK32GX4M2D3600C18

If I remember right, Ryzen rounds CAS latencies to the next even number, so there shouldn't be much difference.