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Ryzen 3900X can't clock 1800MHz Infinity Fabric with 3600 CL14. Disappointed with Ryzen.

gerardfraser said:
Do you actually think ,I think that all Ryzen CPU'S can hit 1900Mhz.HMMMM interesting.



It is possible and not a problem on ,now every Ram/Motherboard combo can not do this.I have 2 x 3600X that can.



Sorry I am not trying to confuse you,
I suggest continue testing the voltage but if you want to just jump to test DDR4 @ 3800Mhz and infinity fabric to 1900Mhz you can if you want but you need to change what the calculator and your setting from CL14 to CL16.

Keep voltage at 1.44v on the DRAM and test.
So if you start getting stuttering/hitching/crashes or just weird stuff you would need to add voltage to your RAM.
Let us know what happens if you decide to jump ahead with higher settings.

Click to expand...
Yeah, 3800 CL14 did not work on my ram. It booted at 3800 CL16.
Running tests now.

What are the advantages of running 1900 vs 1800 in theory?
 
KhakiKukhi said:
What are the advantages of running 1900 vs 1800 in theory?
Click to expand...

Lower memory latency? Beyond that, I'm not sure there are many things that would gain any real advantages.
I guess you'll see if it's worth it with your RAM or not.
Unfortunately W1zzard didn't test at 3733 and 3800.
www.techpowerup.com

AMD Zen 2 Memory Performance Scaling with Ryzen 9 3900X

We take a close look at memory scaling on AMD's new Zen 2 Ryzen 3900X, testing both application and gaming performance at seven different memory speed and timing combinations ranging from 2400 MHz all the way up to 4000 MHz.
www.techpowerup.com www.techpowerup.com

This might help get you some further insight.
lab501.ro

AMD Ryzen 3000 – Part IV – DDR4 Scaling – ENGLISH Version

DDR4 Scaling PAGE GUIDE FOR THE MOBILE READERS 1 & 2 – Background info and news regarding the AMD Zen 2 memory sub-system 3 – Testbed 4 – 12 – CPU Tests 13 &#8211…
lab501.ro lab501.ro
 
TheLostSwede said:
Lower memory latency? Beyond that, I'm not sure there are many things that would gain any real advantages.
I guess you'll see if it's worth it with your RAM or not.
Click to expand...
90.3ns lol
131103
 
TheLostSwede said:
Then you'er no longer 1:1. You might have to and set that manually again.
The IF speed needs to be 1900MHz as well. As I said, it might not work. If so, try 3733.
Click to expand...
I tested again and now it's 93.4ns at 1.5v now.
Ryzen Master shows both IF and RAM at 1900.
131112
 
TheLostSwede said:
Interesting.
That's a first.
Really couldn't say why. I don't see any reason for it.
Click to expand...
Just my luck!
I'll try 3733 next.

p.s. I'm also getting lower memory reads at 3800.
 
KhakiKukhi said:
I tested again and now it's 93.4ns at 1.5v now.
Ryzen Master shows both IF and RAM at 1900.
Click to expand...
Your Trfc value is very high - if possible try to lower it
131137
131136

Heres my settings with the F5I bios + TRFC set to 310
 
Last edited:
This is 3773 CL16 wth tRFC at 653
131113


I'm gonna try lowering tRFC next.

UPDATE:
RAM @ 3733, tRFC @ 570 is 66.4ns
RAM @ 3733, tRFC @ 550 is 66.5ns

There seems to be no improvements between 570 and 550. Should I still try to lower it?
 
Last edited:
No your memory controller is not synced,so you are getting 90ns.You want what I posted the first time.You said you can not find it in BIOS but I do not have your motherboard but it should at least do it on auto. You can also look more in BIOS for the setting.(So in BIOS set mclk=uclk)
The memory clock (mclk), the memory controller clock (uclk), and the infinity fabric clock (fclk) all need to be synced for best results.
So in BIOS set mclk=uclk
When set the mclk:uclk:fclk should be set to ratio1:1:1 for best results.
Click to expand...

Then your settings should look like this so you do not get 90ns. NB Frequency is memory controller in CPU-Z

I am going butt out of this thread,have fun testing ,good luck.
 
gerardfraser said:
No your memory controller is not synced,so you are getting 90ns.You want what I posted the first time.You said you can not find it in BIOS but I do not have your motherboard but it should at least do it on auto. You can also look more in BIOS for the setting.(So in BIOS set mclk=uclk)


Then your settings should look like this so you do not get 90ns. NB Frequency is memory controller in CPU-Z

I am going butt out of this thread,have fun testing ,good luck.
Click to expand...
Hey, thanks for all the help. If it weren't for your steps, I'd have given up at 3533 CL16.
I'll check CPU-Z with 3800.

Here it is. MCLK, UCLK, FCLK seems to be the same.
91.8ns at 1900 1.45V.
I get 66.6ns at 1867 1.45V.
Both are at 570 tRFC.
Should I increase the voltage on the 1900?
131115
 
Last edited:
It might be worth trying today's new UEFI, F4.
Just keep in mind that all your saved profiles will be wiped if you update your UEFI.
www.gigabyte.com

X570 AORUS XTREME (rev. 1.0) Support | Motherboard - GIGABYTE Global

Lasting Quality from GIGABYTE.GIGABYTE Ultra Durable™ motherboards bring together a unique blend of features and technologies that offer users the absolute ...
www.gigabyte.com www.gigabyte.com
 
EarthDog said:
export to usb stick... load from usb stick, save to updated bios. :)
Click to expand...
I actually found out that thats not allways possible, it was from one of the previous upgrades. But som nice screen dumps of the settings as Well, then its easy done
 
Yup! Updated my BIOS first thing in the morning.
I wasn't smart enough to save my profiles so I lost them.
 
Chomiq said:
Here's a SS from reddit, 3800 on E-die:
Stable at 1.41.

Guess I'll tinker with mine today.
Click to expand...
Tried, ended up with same results. Safe and fast 3600 both post, boot into windows, memtest throws errors, tried increasing voltage by .01 increment and it did nothing. 3800 CL16 Safe preset wouldn't post. At this point the options are:
- stick with 3466 CL14 with Fast timings - it's stable at 1.4 V (could probably drop it to 1.39 V) and that's what I've been using for a week now, latency's around 69 ns,
- try to get 3600 CL16 to work without errors.

Question is - is it even worth it?
 
Chomiq said:
Tried, ended up with same results. Safe and fast 3600 both post, boot into windows, memtest throws errors, tried increasing voltage by .01 increment and it did nothing. 3800 CL16 Safe preset wouldn't post. At this point the options are:
- stick with 3466 CL14 with Fast timings - it's stable at 1.4 V (could probably drop it to 1.39 V) and that's what I've been using for a week now, latency's around 69 ns,
- try to get 3600 CL16 to work without errors.

Question is - is it even worth it?
Click to expand...

Did you try the new memory calculator that was released yesterday?
 
TheLostSwede said:
Did you try the new memory calculator that was released yesterday?
Click to expand...
Nope, wasn't aware it was released. Thx for the info.

Also, I had troubles finding the cLDO VDDG Voltage and cLDO VDDP Voltage in GB bios settings, have they renamed it to something else or are they scattered somewhere else.
 
It's not guaranteed it will run stable at 3800 as it depends on more factors. However, I was able to stabilize every tested Micron E kit at 3733 on Gigabyte and ASRock X570 mobos.
Micron E in ~3200-3600 kits generally works like:
3600/3733/3800 16-17-17, 16-18-18, 16-19-19 1.35-1.40V, matter of luck
(results based on 8 different kits)

On Ballistix Elite 3600 CL16/GB X570I Pro WiFi, all I had to do to make it run at 3800 was to set XMP timings and 3800mem/1900IF. It also depends on the CPU/IMC.
I wasn't able to stabilize my kits at CL14 3466. Max was 3200-3466 CL15-15-15. For CL14 you need different IC, usually Samsung.
If you take a look at results then optimal is XMP with tweaked sub timings.

I can't find any screenshots at the lower clock. Found only this one at 4800.
 

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Chomiq said:
Also, I had troubles finding the cLDO VDDG Voltage and cLDO VDDP Voltage in GB bios settings, have they renamed it to something else or are they scattered somewhere else.
Click to expand...
I can help you with that. Lemme get back home and get some pics for you.
 
KhakiKukhi said:
My Ryzen 3900X that I just recently purchased can't clock to 1600MHz on Infinity Fabric.
When I clock to 1600 IF with 3600 memory, testing Cinebench R20 causes my PC to black-screen and reboot.
1400 IF with memory at 3600 is stable.
Memory is Ballistix Elite 3600 CL14.
CPU is running with stock cooler.
Temps do not exceed 85C.
Please help.


Here are my PC Specs:
  • CPU: Ryzen 9 3900X
  • Motherboard: Gigabyte X570 Aorus Xtreme
  • RAM: Crucial Ballistix Elite 3600 CL 16 (2 x 8Gb) (Clocked at 3600 CL14)
  • CPU Cooler: Wraith Prism (Stock cooler)
  • PSU: Cooler Master V1000 80+ Gold (Replaced once)
  • GPU: Nvidia GeForce GT 705 (Pulled this out of a old Dell somewhere, still waiting for my graphics card to arrive)
  • OS: WIndows 10 Pro Latest Build (I need Win 10 Pro for my workloads)
___

Here's what I've tried:

  • I have updated all drivers and BIOS to the latest version.
  • Replaced my PSU (Replaced Cooler Master V1000 with another V1000)
  • Updating and trying both main and backup BIOS.
  • Tested both ram sticks individually in all 4 RAM slots, failure persists.
  • Test both ram sticks in A1, B1 configuration and A2, B2 configuration, failure persists.
___

Additional information:

  • I have plugged in both 8-pin CPU power.
  • Bios version: Gigabyte F3
  • Benchmarks and stress test FAIL using XMP 3600 CL16 (1800 Infinity Fabric) but PASS using 2666 (1333 Infinity Fabric)
  • CPU temperatures do not exceed 85C.
  • CPU throttles at 80C.
UPDATE: I've managed to achieve stability at 1767 Infinity Fabric and 3600 memory.
Click to expand...


For what i see my guess is you have your timings to tight!

I have a MSI MEG Ace with 3900x and 3600Cas 15 with IF at 1800 by default!! so yours have to work to.

What is the rated speed of your rams?
What soc voltage is the MB putting into your system?
What are the settings you are putting in you mobo to define your memory banks at 3600cas14(ram voltage/soc voltage etc...)?

Why is your CPU throttling at 80cº??? that doesnt make sense....since the tjmax for a 3900x is 95cº.
Something is wierd in your info bro.
Reset your Bios and place your full system specs so you can validade what type of configs you need to place on your system
 
Never ending story: AMD Ryzen and "top" memory

It will take days/weeks to get it running and stable. You will test new BIOS, beta BIOS, rollback BIOS, you will learn 34 (or 39) options in BIOS, memory calculator, memory timing, sub timing, ..., you will wait for new, better Agesa. And again and again. Just AMD (ASUS) lab.

This is my old experience with top components, ASUS MB, Ryzen and RAM 3200 CL14. Never again. And now I see the same, 2,5 years later. Only Ryzen is now Ryzen 2 and memory 3600.

Ryzen (Ryzen 2) is good processor. I have one PC with X570 and waiting for 3950X. But forget to buy and use "top" memory for Ryzen. It is wasted time.
 
Chomiq said:
Nope, wasn't aware it was released. Thx for the info.

Also, I had troubles finding the cLDO VDDG Voltage and cLDO VDDP Voltage in GB bios settings, have they renamed it to something else or are they scattered somewhere else.
Click to expand...
VDDG and VDDP are in the "Settings" tab. It's under "AMD Overclocking."
They're in millivolts.

If you prefer Ryzen Master, they're here:
131200
 
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