Can't hit 3600RAM - My 3900x @ 1800 FCLK Journey

[lightingman117]

I've been out of the 'game' for a long time. First new build.

Finally upgraded my i7-875K + MSI-GD80 + 16GB 1333 ram system.

I don't particularly want to work for the "it just works, AMD @ 1800 IF" statement.

 

I want to run the standard 1800:1800:3600 FCLK:UCLK:MCLK but I've been banging my head a bit.

 

I watch this:

https://youtu.be/7w1EGPZUESU

 

I got it to boot at 1800 FCLK once and ran C20 for a few times, fooled around and tried OC to 4.6 insta crash... can't get 1800 again [not even over 1600].

I've screwed with voltage settings and tried slowly ramping up clock speeds and everything between. I'd like to start over, fresh and see what I can do.

Strangely I never got the BIOS to set the FCLK and boot, only Ryzen Master was able to do it.

I've heard/read 98% of people can easily get 1800, and most can get a bit more. Just a few are at 1733 or so.

Did I just lose the binning lottery?

 

Thoughts?

Thanks for listening

 

Current settings:

Default || 4150MHz

FCLK: 1600

UCLK: 1600

MCLK: 3200 [16-19-19-19-39] 1.35v

Vcore: 1.35 (AMD Official says: 1.45-1.5 is okay)

VSoc: 1.1

VDDP - 1.0

VDDG - 1.0

C20: 6500

 

Desired settings:

Current settings:

Default || 4250MHz

FCLK: 1800

UCLK: 1800

MCLK: 3600 [16-19-19-19-39] 1.35v

Vcore: 1.35

VSoc: 1.1

VDDP - 1.0

VDDG - 1.0

C20: 7500

 

Parts:

ASRock X570

G.Skill Trident Z Neo F4-3600C16D-32GTZNC

3900x Stock cooler (I've never seen a temp above 80c even while messing with everything and mostly stays around 60c even under load and light OC.)

Antec 900 case

Sabrent Rocket Gen4

MSI GTX970

750w seasonic

 

Resources:
Cooling - https://www.techjunkies.nl/2019/10/11/what-is-the-best-way-to-cool-a-ryzen-9-3900x/

FCLK overview - https://www.techjunkies.nl/2019/10/15/__trashed/
Wat do? - https://www.reddit.com/r/Amd/comments/cnl1qn/what_infinity_fabric_clock_speeds_fclk_are_people/

Wat do? - https://www.reddit.com/r/Amd/comments/ccyj72/psa_ch7_and_3900x_a_few_tips_for_ram_and_infinity/
Extremely useful? https://www.techpowerup.com/forums/threads/ryzen-3000-fclk-issue.264073/

How get most R3 - https://edgeup.asus.com/2019/how-to-get-the-most-out-of-third-gen-ryzen-cpus-and-the-x570-platform/

OC Tut - https://youtu.be/M5pHUHGZ7hU

R3 memory system overview - https://youtu.be/xSAFs-t0DCg

 

 

 

[FloRolf]

7 minutes ago, lightingman117 said:

Stock cooler (I've never seen a temp above 80c even while messing with everything and mostly stays around 60c even under load and light OC.)

Either you live in the freaking arctic or you're doing something a lot better than I do. 

My 3900X easily reached high 80's on stock with the stock cooler and OC'ed just instantly died with over 100°C

Even on an H100 I still get 85°C at stock clocks. Have you actually tried longer 100% load tests to let it warm up? A high OC doesn't help you when it only lasts 2mins

 

[Jurrunio]

Seems like you completely forgot about the difference between single core and all core workloads. AMD's 1.45-1.5V is only for bursty single core workloads like moving the cursor around or booting Windows, in all core workloads like rendering or Prime95 it will never go past 1.3V on its own and for higher core count models like the Ryzen 9 CPUs, even lower. I do not recommend going over 1.3V with manual OC, especially on stock cooler.

 

Ryzen Master settings override BIOS settings (itself burying settings inside "AMD overclocking" section) and you have to remove them from the BIOS in order for your own settings to apply.

 

Try raise memory voltage to 1.4V and see if 1800MHz FCLK work with 3200MHz memory.

[lightingman117]

9 minutes ago, FloRolf said:

Either you live in the freaking arctic or you're doing something a lot better than I do. 

My 3900X easily reached high 80's on stock with the stock cooler and OC'ed just instantly died with over 100°C

Even on an H100 I still get 85°C at stock clocks. Have you actually tried longer 100% load tests to let it warm up? A high OC doesn't help you when it only lasts 2mins

 

 

I was quite surprised myself. It Idled high with stock voltage of 1.45 (40c), but after setting it to 1.35 the idle came down Max stock temp was 61C on C20.

 

I've ran P95 for about 5min just to see what it peaks at, and between all the random OC stuff I was doing and running C20 I never saw more than 81c.

 

No, I haven't run a 1hr P95 test to see, I'll do that once it is minimally stable at stock settings with IF at 1800, haha.

 

My home AC is set for 24C (75F)

[lightingman117]

4 minutes ago, Jurrunio said:

Seems like you completely forgot about the difference between single core and all core workloads. AMD's 1.45-1.5V is only for bursty single core workloads like moving the cursor around or booting Windows, in all core workloads like rendering or Prime95 it will never go past 1.3V on its own and for higher core count models like the Ryzen 9 CPUs, even lower. I do not recommend going over 1.3V with manual OC, especially on stock cooler.

 

Ryzen Master settings override BIOS settings (itself burying settings inside "AMD overclocking" section) and you have to remove them from the BIOS in order for your own settings to apply.

 

Try raise memory voltage to 1.4V and see if 1800MHz FCLK work with 3200MHz memory.

Thanks, I'll try that.

 

I don't think I did, because undervolting is to get lower temps for more stable IF OC and I monitored my temps and never had an issue at 1.35. So I didn't think my voltage was an issue. I figured start high (with low temps) then lower it once my IF (FCLK) was stable at 1800.

 

I also figured the IF clock was tired to SOC/VDDP/VDDG voltages more than Vcore.

 

I never tried mem voltage cuz I thought it would just work at 1.35v since the manufacture stated it as such.

But like I said, I'm happy & want to to restart from scratch.

[lightingman117]

Just to check myself I ran P95 for 10min...

 

Reset back to stock:

max temp 71C my fan speed didn't even rev up. 2800rpm max barely hear it

6451 C20 benchmark

Vcore 1.387

4150MHz all core

1600 fclk

1800 mclk

900 uclk

[lightingman117]

16 hours ago, Jurrunio said:

Try raise memory voltage to 1.4V and see if 1800MHz FCLK work with 3200MHz memory.

Welp...I don't know what to make of this, I guess the CPU can handle the faster IF speed but the memory can't?? I thought since the memory was 3600 it should work fine up to 3600/2=1800.
 

Also, I found that I can't jump at all to new FCLK or UCLK speeds. It must be in the lowest increment making sure the system posts each time. I'm new to OC, so why is that?

 

Anyways, I shall do this next: 

 

 

CinR20: 7075

AllCore_MaxF: 4023MHz

MaxTempC: 78

FCLK: 1800

UCLK: 1600 (3200)

DRAM: 1.4v

22-22-22-22-53

 

Stock voltages:

Vcore 1.488

SOC 1.1

VDDP 1.0979

VDDG 1.0979

 

____________

 

CinR20: 7124

AllCore_MaxF: 4030MHz

MaxTempC: 78

FCLK: 1900

UCLK: 1600 (3200)

DRAM: 1.4v

22-22-22-22-54

 

Stock voltages:

Vcore 1.488

SOC 1.1

VDDP 1.0979

VDDG 1.0979

[Jurrunio]

32 minutes ago, lightingman117 said:

Welp...I don't know what to make of this, I guess the CPU can handle the faster IF speed but the memory can't?? I thought since the memory was 3600 it should work fine up to 3600/2=1800.

memory controller may not

 

32 minutes ago, lightingman117 said:

Also, I found that I can't jump at all to new FCLK or UCLK speeds. It must be in the lowest increment making sure the system posts each time. I'm new to OC, so why is that?

UCLK is tied in ratio to MCLK, but FCLK should be freely adjustable in increments

[lightingman117]

4 minutes ago, Jurrunio said:

memory controller may not

 

UCLK is tied in ratio to MCLK, but FCLK should be freely adjustable in increments

Oh, duh. So IF is good to go; but UCLK might not be. Got it.

 

What I meant was, I can't go from a completely stable 1600 FCLK with loose memory (3200, crappy timings) to 1700 I have to first hit 1633,1666,1700 and post each time.

 

So I did stay up a bit late testing this and tried to keep UCLK & FCLK in 1:1 ratio, but system doesn't post past 1600 even with DRMM @ 1.4v
What do next good sir/ma'am?

[Jurrunio]

38 minutes ago, lightingman117 said:

What I meant was, I can't go from a completely stable 1600 FCLK with loose memory (3200, crappy timings) to 1700 I have to first hit 1633,1666,1700 and post each time.

is the bios the latest version? Seems like some weird things bios update should fix

[lightingman117]

4 minutes ago, Jurrunio said:

is the bios the latest version? Seems like some weird things bios update should fix

Yep v2.8

 

Maybe I'm not waiting long enough for it to post, but I'd think it would post after 3-5min of sitting there.

[lightingman117]

I boosted mem speed as far as I could keeping IF at 1900, I could never hit 3400. I then stuck with 3333 and tried lowering timings. This is all I could do. I then lowered mem voltage. It's stable-ish.

 

So after watching Buildzoid vids and reading OC material all day (much more than I ever wanted to put in this thing). I can't do much better than this it seems?

Any UCLK voltages to try? All these voltages are stock/auto.

 

CinR20: 7050

AllCore_MaxF: 4013MHz

MaxTcore_C: 78

MaxTmem_C: 36.9

FCLK: 1900

UCLK: 1666 (3333)

DRAM: 1.375v

16-19-19-19-39

 

Stock voltages:

Vcore 1.488

SOC 1.1

VDDP 1.0979

VDDG 1.0979

 

 

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

 

After all that mem & fabric clocking I tried a CPU OC in Ryzen Master...

Seems stable-ish in P95 (although it hits 97C in a few minutes running small FFT size) Need better cooler if I want that to run like that.
But P95_Blend seems stable around 70C so I'd say the system is mostly stable.

Edit: I had a crash; I forget what I was doing. But probably a good idea to run P95 for a good 12Hrs to see how the system does.

 

Bummed I couldn't get my 1800/3600, but I'm done tweaking and if this seems stable and good to go for a daily; i'm plenty happy with performance, I hit ~7500 CinR20 which is what I wanted.

 

CinR20: 7485 [2nd run 7628]

AllCore_MaxF: 4300MHz

Vcore 1.3125

MaxTcore_C: 81 (Cinebench)

MaxTmem_C: 36.9

FCLK: 1900

UCLK: 1666 (3333)

DRAM: 1.375v

16-19-19-19-39

 

Stock voltages:

SOC 1.1

VDDP 1.0979

VDDG 1.0979

[lightingman117]

Another thought... Before the return period goes away.

 

Is there any reason to return/swap the RAM/CPU/MoBo?

 

I'm still annoyed the RAM won't run at 3600 no matter what I do.

 

Also, after tying to install windows on a Gen4 PCIE NVME drive the MoBo kept posting to bios saying there was 0GB memory.

I reseated it and still having issues. It's weird...?