WifeWillCutmyNutzOff the Third - Memory Tuning

[Vinster]

I have my cooling swapped in. Today I'll be prepping some cabling and installing Win10 on a temp drive to start getting used to the Bios and settings and options.

What tools should I be looking at to tune and test the memory on this system? I'm old enough that my mental go-to is Memtestx86.. but is that still an appropriate tool anymore?

Do you guys know if Zen3 is compatible with the DRAM Calculator: www.techpowerup.com/forums/threads/dram-calculator-for-zen-3.274352/

We talked about it here: warp9-systems.proboards.com/thread/785/ryzen-memory-calculator

This is an Asus C8H, so I believe they have software to adjust memory settings in windows, I'll have to dig that out...

I was previously able to enable the DOCP of my memory it on this MB and didn't have any issues loading the 4400mhz profile at 18-19-19-39 primaries and secondaries were all left at auto. I will need to confirm the command rate later, I don't know what that is on this memory kit.

So what do you guys suggest? What are basic tools I should be referencing/using? I know I can use MaxMem. but would that test the memory enough? I just remember the benchmark mode. I'm sure it would have some sort of stress test..

I'm curious to know how low the timings can can get at the rated 4400Mhz, then I wonder what timings I could get if at 4000mhz or 3800/3600.

I last really played with DDR2. With DDR3 I stuck with Primaries and frequency... but I've never messed with DDR4, I've always just loaded DOCP/XMP and left it. But the reading I've been doing with Zen2/Zen3, the gains are work investigating.

Let me know.

Vin

[ShrimpBrime]

As far as I've seen Vin, the memory controller is very similar to the Zen2. So I think you "should" be able to replicate past overclocks.

However you may wait on some bios updates for performance and stability gains just like any other released cpu in the past.

What you get today, you may have different tomorrow. You know how it goes.

[Vinster]

Thanks Jon, I'll look up some Zen2 guides.

Here is my starting point.

Vin

[ShrimpBrime]

That's a nice start.
Wheels turning, what's 1.6v gonna get ya?!

[Vinster]

Ok, wow.. So I read 1usmus's guide on Tech Powerup. There is a shit ton of info in there...

Now on my system I was not able to run the Ryzen Timing Checker. I get a "This Software is only for RV and ZP based AMD Ryzen CPU's" error. So my only method to verify all timings in Windows is to use the Ryzen calculator and click on "Compare Settings"

So I stuck with the Calculator values for now. I haven't tried going beyond that yet... and it the DOCP 4400mhz @ 18-19-19-39-1T were the slowest read speeds and latencies out of the settings I've tried...

Here are some screenshots.

Here is my DOCP... Memory Read= 49736MB/s @ 70.5ns Latency

Here is 3866mhz... Memory Read= 58282MB/s @ 55.0ns Latency

Here is 3600mhz... Memory Read= 54459MB/s @ 57.5ns Latency

continued on next thread

[Vinster]

Here is 3200mhz... Memory Read= 48653MB/s @ 60.0ns Latency

So any other combination here is better than my DOCP settings.. That I was really surprised about...

Now to get 3866 I had to use the maximum memory voltages from the calculator. and in the calculator because Zen3 is not supported, the highest I can select is 3866. Now you'll see in my DOCP profile there are values there. They come up when I load the application. If I click on safe or fast, I get a "Not Supported" error.

Now none of these have been stress tested yet. I wanted to fine the fastest and then select it and tune from there. That was my thinking as I believe the calculator is mainly a starting point and not stone.

So what do you guys think. My initial thought is to see 3800mhz, try to use some safe combination between the calculator and Georges info that he posted here: warp9-systems.proboards.com/post/41877

I'm open to other suggestions. This gear isn't going anywhere and this won't be my main rig until the GPU and M.2 storage...

Now another item that has me thinking... if I settle for 3600mhz (lets just say)... I wonder how this system would behave if I got a 2nd kit to run 32GB. There is proof out there that this family prefers 4 sticks over 2....

Vin

[Vinster]

Nov 14, 2020 2:26:33 GMT -5 ShrimpBrime said:

That's a nice start.
Wheels turning, what's 1.6v gonna get ya?!

Not a clue.. I'm thinking more like 24/7 over peak... but if you have something you want me to try, I might consider it.

Vin

[Vinster]

I was able to get to windows with 4400Mhz @ 16-16-17-39@1T

Memory 55745MB/s - 67.4ns Latency...

It is really looking like this CPU no likey 4400mhz....

Vin

[ShrimpBrime]

Nov 14, 2020 16:15:19 GMT -5 Vinster said:

It is really looking like this CPU no likey 4400mhz....

Vin

It's no Intel on the memory front I don't think..... 

CL14 at 4000mhz maybe around 1.50v or less no?

[Vinster]

Nov 14, 2020 17:37:25 GMT -5 ShrimpBrime said:

Nov 14, 2020 16:15:19 GMT -5 Vinster said:

It is really looking like this CPU no likey 4400mhz....

Vin

It's no Intel on the memory front I don't think..... 

CL14 at 4000mhz maybe around 1.50v or less no?

I was able to boot in to windows at at 4000Mhz @ CL16 with 1.45. Wasn't stable. I think you'd quite a bit more than 1.5v to get CL14 with this kit at 4000mhz

Vin

[Vinster]

ok, so at 4000mhz, with only primaries set (16-16-16-36-1T) and all secondaries on AUTO and at 1.4v I was able to boot in windows and memtest and linx test and everything passed

Vin

[Vinster]

2 Things...

1) yay, a new bios is available... but now that it is loaded, none of my profiles boot anymore. and only on a bios clr, load optimized and then set DOCP will it boot... So I'll leave to this for now. Hope a better bios comes soon. even manually setting my 3200, 3600 or even 3866 profiles causes a memory boot stop code. I'd rather not go backwards... So I'll wait a week before I do something here.

2) I've realized that I cannot find the UCLK ratio in my bios, I just thought FCLK and UCLK were set together. but after the bios update found in HWInfo my UCLK is either 1000mhz or 1100mhz based on boot up... So I'll have to search for that.

If anyone knows what sub-menu that lives in on a C8H. let me know

Vin

[zila1]

Did you hear anything about the newer X570 chipset having trouble running over DDR4 3200 speeds stable? I think I may have heard it on Tech Deals. It just hit me when I saw you having trouble getting some stable runs here.

[Vinster]

Nov 17, 2020 18:28:59 GMT -5 zila1 said:

Did you hear anything about the newer X570 chipset having trouble running over DDR4 3200 speeds stable? I think I may have heard it on Tech Deals. It just hit me when I saw you having trouble getting some stable runs here.

running DOCP at 4400mhz is fine. I was having issues with the numbers from the ryzen calculator, which isn't anything as that's a starting point.

I was stable at CL16 @4000mhz@1.4v if I only adjusted the primary timing and left the remainder on Auto.

I've been under the weather since Sunday and haven't touched a PC except while working. I'm hoping to pick this up in the next few days.

Vin

[zila1]

I have the same issues with the Ryzen Dram Calculator. It never works for me.

I hope you feel better real soon. You just take it easy and relax.

[Vinster]

ya, this Bios is broken. Anything other than stock or DOCP and I get stuck on Boot Code 07 "AP Init after Microcode Loading".

Doesn't make any sense to me. If they don't have a new bios in the next few days I'll revert back the to the Beta Bios.

Vin

[zila1]

It took AMD a while to get there ram speeds up on previous generations. My X470 can finally handle DDR4 3600 with ease but that's it. It is picky on which ram modules are in there too. I can't get my B-Die stable at 3600 but the Crucial Ballistix RGBs(Micron E-Die)run great. (DDR4 3600 16-18-18-38-58 1T) I tried tightening them up a little more but they don't like it. Ram tuning is a challenge on AMD.

[Vinster]

Ok, with an updated bios from Asus, I can adjust memory again... Though things are not 100%.. I don't get it.. I'm setting my memory at CL15, but it's booting at CL16.

Has anyone seen that before?

Here is a screenie of where I am at. I'm done for tonight, but tomorrow I was going to see if I can CL14@3600mhz...

right now I just have primary memory settings adjusted. Also tomorrow I am going to jot down what the bios "AUTO" secondary settings gave me and compare those to the Ryzen calculator

Here is a screenshot of my progress.

I've finally found the MCLK and UCLK memory settings. Man are they buried in the bios... all memory is at 1800Mhz... FCLK:MCLK:UCLK are 1:1:1 now

Vin

[Aleslammer]

This won't actually answer the CAS 15 setting as I can't remember the setting in BIOS but it is there.

[ShrimpBrime]

Nov 30, 2020 9:04:16 GMT -5 Aleslammer said:

This won't actually answer the CAS 15 setting as I can't remember the setting in BIOS but it is there.

Disable Gear Down mode I think allows odd cas latency timings.

[Vinster]

Thanks Guys. That did it.

Vin

EDIT: Ok, my memory does not like 3600@ 15-15-15-34-1T (1.4V SOC @ Auto = 1.087v) but it passed TestMem5 at the last posts timings but at 1866mhz with everything at 1:1:1

So I'll bump the speed up in steps to see where I start getting errors. Then I'll start looking at the secondary timings.

[Vinster]

[Vinster]

Tiny gain. trying for 1933mhz yields a lock up on boot. but she'll run without errors like this.

I think 1900 is the best my IMC will do.

Vin

[Vinster]

Shit.. Too bad I don't know up to install Windows 7 on this board...

I'd be 1st place in MaxMemm

or am I reading it wrong... hwbot.org/submission/4614640_triox.sgi_maxxmem_read_bandwidth_ddr4_sdram_53845_mbytesec.

Vin

[Vinster]

I've started blending the Ryzen calculator with the settings I have. initial was to see the change from not forcing the MCLK and left it on Auto so I can set 3866mhz... and I can and everything is fine.. in this case I'm not running 1:1:1, but everything works. If I try for 3866 with everything at 1:1:1 then I start getting memory errors.... This way is "faster" but latency is lower.

Depending on the test will go as high as 75ns with this screenshot being the best low.. but before (1:1:1) the peak was 68ns with a low or 60ns...

so slightly slower speed but MCLK:FCLK:UCLK at 1:1:1 had a more positive effect on latency....

Is read/write speed better... or latency...

What do you guys think?

Vin

[Vinster]

proof that a slower speed with 1900mhz 1:1:1 is better... all the same timings.. wow..

Thanks for the hints in the other thread George

Vin

[ShrimpBrime]

Well yeah, look at the IF frequency drop to 966mhz. Crazy performance loss.

Can you increase the IF speed by it's self, or is it stuck at the 1:2 ratio no matter what?

[Vinster]

Dec 2, 2020 23:07:46 GMT -5 ShrimpBrime said:

Well yeah, look at the IF frequency drop to 966mhz. Crazy performance loss.

Can you increase the IF speed by it's self, or is it stuck at the 1:2 ratio no matter what?

once they are not equal, it drops to a 1:2 ratio.. I have to change all 3 together. and beyond 1900 I cannot post at all. I've tried bumping my memory voltage as high as 1.5 and my SOC to 1.25 and still no dice.

I think I'm at my IMC efficiency.

If someone has any input on a possible setting I'm not aware of, I'd love to hear it...

--------------------------------------

CPU OC is next. I'm going to start reading on that for this platform (start another thread for that). Changing my ratio from Auto (48.5 default) to 49 is not stable in windows and 50 will fail to load windows. I've bumped my vcore voltage as high as 1.5 and made no difference at all... tomorrow, I might same my memory settings clr cmos and see what I get with default memory. if I make headway I'll see how far I can go...

temps are not an issue.. 100% CPU usage with 95% memory usage, after 30 min my CPU temp is only 58 degrees. my water temp was 28 degrees.. my pump and fans were not even at 75%.. I have a lot of headroom left.

Vin

[keeph8n]

1:1:1 is more beneficial in almost every bench while ambient overclocking. Geekbench benefits from the frequency for going 2:1.

For me benching profile for 2x8 looks like 4600 14-13-13-13-28-35 1T 1.85v. 2x16 Looks like 4200 14-13-13-13-32-42-1T 1.65v.

Either profile I run max FCLK the chip will do. Usually in the 1866-1933 range. No more than 1.2v SOC on ambient for me.

Anymore questions on AM4, just ping me here or on LN2 Haven

[zila1]

Vinster: nice rig. Me likes a whole lot.