Question 3600MT/s OC from 3200 on Samsung D-die ? It's possible ?

[Inver_ShaRingan]

https://www.kingston.com/dataSheets/KF432C16BBK2_16.pdf

I possessed those kits in my current set up on A520M ITX Asrock /AC, 5600X R5.

3200 Cl16, Samsung D-Die... Like why they couldn't put B, it's not that far from D 😆.
Any way, cuz they are D-die, I couldn't find much info about OC on them. So is here any one with same kits, and sucessfully OCed them to At least 3600 without skying out Cl's ? 🤔

 

[punkncat]

Keep in mind that to pull off an "XMP" OC that high, you are also going to need a motherboard with strong VRM and voltage stability. The 'A' chipset isn't it. To be fair, it is unlikely that you would be able to tell anyway and might end up slower (if it works) after dialing the latency up to achieve it.

 

[Inver_ShaRingan]

Sadge.. didn't supposed to A520 will that weak overall. Shame me. But if I will upgrade to some B550 or even X570, then those kits will likely allow themself to OC up to 3600 with no so high Cl ? Or D-die comapring to B-die, are just bad.

 

[drea.drechsler]

Sadge.. didn't supposed to A520 will that weak overall. Shame me. But if I will upgrade to some B550 or even X570, then those kits will likely allow themself to OC up to 3600 with no so high Cl ? Or D-die comapring to B-die, are just bad.

I'm not sure of your kit specifically but I'm aware it has been done with other D-die kits. It usually requires tweaking of timings and sub-timings though... if nothing else for stability with memory testing. And most likely a tolerance for running with higher than normal DRAM voltage settings is needed. In fact, I'd try first raising voltage to about 1.45V before doing anything else just to see if it works. DDR4 is good up to 1.5V although many DRAM's actually lose stability at higher voltages.

Don't be skeptical of raising timings, CL in particular, as latency gets a lot lower with clock speed. Raising timing is usually necessary to keep it stable but properly done latency will most likely end up a wash at worse.

I shouldn't worry too much about VRM quality as DDR4 memory has remarkably low power useage. VRM quality would matter a lot for CPU overclocking, but that's not something you're going to do on an A520 board. Otherwise, it's unlikely any X570 or B550 board will help get any better memory clocks and timings than your A520.

 

[punkncat]

I absolutely disagree about your thoughts on the VRM on an A series chipset.

I also would mention (there is a chart somewhere) that once you start 'loosening timings' and get past a certain point you are actually slowing the module down. Overall this is going to be such a small part of the performance puzzle, that beyond the curiosity of doing it, probably will not net results worth the risk.

.02

 

[drea.drechsler]

.... get past a certain point you are actually slowing the module down...

.02

I do agree going too far isn't going to be helpful. That's where tweaking in a memory overclock can be time consuming: as well as stability tests you have to run latency tests to know you're not going too far with relaxed timings. Sometimes just a little less clock lets you run much lower timings for improved latency. That doesn't mean you shouldn't try though (if you like doing such things).

 

[Inver_ShaRingan]

I'm not sure of your kit specifically but I'm aware it has been done with other D-die kits. It usually requires tweaking of timings and sub-timings though... if nothing else for stability with memory testing. And most likely a tolerance for running with higher than normal DRAM voltage settings is needed. In fact, I'd try first raising voltage to about 1.45V before doing anything else just to see if it works. DDR4 is good up to 1.5V although many DRAM's actually lose stability at higher voltages.

Don't be skeptical of raising timings, CL in particular, as latency gets a lot lower with clock speed. Raising timing is usually necessary to keep it stable but properly done latency will most likely end up a wash at worse.

I shouldn't worry too much about VRM quality as DDR4 memory has remarkably low power useage. VRM quality would matter a lot for CPU overclocking, but that's not something you're going to do on an A520 board. Otherwise, it's unlikely any X570 or B550 board will help get any better memory clocks and timings than your A520.

I have to try 1.45V but if I good remember something wasn't working when set 1.45V, but I guess that was because of too tight timings. But I'll try it when I back home.

I was trying to leave timings on auto, while 1.4V and it was like 26.28.28 so I guess a bit too high 🙈

 

[drea.drechsler]

... 26.28.28...

26-28-28 is way too high for DDR4 even at 3600, overall latency would almost certainly be terrible. And probably out of sync with subtimings and another reason it's unstable.

Definitely go googling for some DDR4 overclocking guides on Ryzen. A big overclock (to 3600 from 3200 is) generally requires visiting the sub-timings and there are a lot of those. A utility that often helps is something called DRAM-Calculator. If it gives timings that are stable they tend be pretty loose, but it's a starting point you can work from to tighten them up.