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*Official* Intel DDR5 OC and 24/7 daily Memory Stability Thread

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#23,702 ·
mron0903 said:
Interesting. MY 8200 CL36-47-47-82 has been TM5 1usmus 25 cycled, and Karhu 24hr tested multiple times to verify. 🤷‍♂️
Click to expand...
Have you verified with VT3?
 
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#23,704 ·
mron0903 said:
Not yet, is there a .bin that I can configure to have a quick and dirty test and also stop on failure?
Click to expand...
Create shortcut from y-cruncher and edit flags to your liking

It should look something like this

X:\my\ycruncher\path\y-cruncher.exe pause:1 stress VT3 -TL:7200

pause means it will not exit window after your declared TL (time limit in seconds) has reached. It will stop on error anyways.
 
#23,705 ·
Image

Got my hands on the new V color 2x24 8400 mt/s XMP before it publicly goes on sale.

xmp at 8400 worked right out of the box for me (on air, without even a fan pointed at the sticks) on my sp106 14900k and A04 z790 apex.

24hr karhu gave no errors, memtest64 gave no errors, tm5 anta777 absolut “new” gave no errors.

these are the new manta “xfinity” kits, supposedly a binned step above the manta “xprism” kits from v color. they also come with thicker copper heatsinks. although for anyone serious they’re coming off and being replaced with copper heatspreaders and a 2 dimm block.




Image

Image
 
#23,706 ·
CD43 said:
View attachment 2645698
Got my hands on the new V color 2x24 8400 mt/s XMP before it publicly goes on sale.

xmp at 8400 worked right out of the box for me (on air, without even a fan pointed at the sticks) on my sp106 14900k and A04 z790 apex.

24hr karhu gave no errors, memtest64 gave no errors, tm5 anta777 absolut “new” gave no errors.

these are the new manta “xfinity” kits, supposedly a binned step above the manta “xprism” kits from v color. they also come with thicker copper heatsinks. although for anyone serious they’re coming off and being replaced with copper heatspreaders and a 2 dimm block.




View attachment 2645697
View attachment 2645696
Click to expand...
Also I don't plan on running y cruncher.
 
#23,707 ·
Hi all. Hoping for some guidance from the heavens.
New to DDR5 and modern intel OC.
I have a Z790-I strix 2 dimmer, 2x24GB Corsair Dominiator Titanium 7200 kit (H24M), and a 14900k.

I have managed to get 7600 stable at: 1.34 VDDQ TX, 1.44 VDD2, 1.17 SA, 1.48 DRAM VDD, 1.45 DRAM VDDQ
but have tried what feels like every combination of these voltages under the sun to get 8000 or 7800 stable.
I have also touch briefly, SenseAmp Training Disabled, VDDQ Training Enabled, and VPP @ 1.9v or 1.75v which don't seem to help much. I have also had weird boot variance where once i had 7800 pass an hour tm5 but the next boot this was no longer the case.

Image


I would really appreciate some guidance on how to get 8000 stable as I have seen a few on here stable with 8000 on this board, as I don't know what training settings, RTLs etc to touch.
 
#23,708 ·
LucaSkywalkerZA said:
Hi all. Hoping for some guidance from the heavens.
New to DDR5 and modern intel OC.
I have a Z790-I strix 2 dimmer, 2x24GB Corsair Dominiator Titanium 7200 kit (H24M), and a 14900k.

I have managed to get 7600 stable at: 1.34 VDDQ TX, 1.44 VDD2, 1.17 SA, 1.48 DRAM VDD, 1.45 DRAM VDDQ
but have tried what feels like every combination of these voltages under the sun to get 8000 or 7800 stable.
I have also touch briefly, SenseAmp Training Disabled, VDDQ Training Enabled, and VPP @ 1.9v or 1.75v which don't seem to help much. I have also had weird boot variance where once i had 7800 pass an hour tm5 but the next boot this was no longer the case.

View attachment 2645712

I would really appreciate some guidance on how to get 8000 stable as I have seen a few on here stable with 8000 on this board, as I don't know what training settings, RTLs etc to touch.
Click to expand...
Consider yourself lucky to get 7600. I'd stop there while you are ahead.
 
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#23,709 ·
Hey Guys, I'm trying to get some help with getting my OC stable at 8000mhz
System:
14900k
Apex Encore
T-Create 7200mhz CL 34 2x24gb

SP 98 Chip,
P 106
E 84
MC 82

I can get 7800mhz Stable for 24 hours of Karhu but almost whatever I try I can't get it to 8000.
I've attached a picture of what I'm using for 7800.

I can't get passed more than a few minutes of Karhu at 8000.

I'd appreciate any help.
Thanks!
 

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#23,710 ·
ProtonJohn99 said:
Hey Guys, I'm trying to get some help with getting my OC stable at 8000mhz
System:
14900k
Apex Encore
T-Create 7200mhz CL 34 2x24gb

SP 98 Chip,
P 106
E 84
MC 82

I can get 7800mhz Stable for 24 hours of Karhu but almost whatever I try I can't get it to 8000.
I've attached a picture of what I'm using for 7800.

I can't get passed more than a few minutes of Karhu at 8000.

I'd appreciate any help.
Thanks!
Click to expand...
I'd start by trying lower SA Voltage. Start with 1.13 SA
1.5VDD/1.4VDDQ
Leave IMC VDD and VDDQ TX on auto.
 
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#23,712 ·
ProtonJohn99 said:
Thanks! Tried that but unfortunately it errored at 6 minutes.
Click to expand...
ram temps are 52C with 1.45 vdd. Increasing to 1.5 for 8000 probably increases temps another ~5+c so may err from high temps. Could try 120mm fan over ram. If already have fan then plastic cover is keeping temps high.

Or keep voltage ~1.46 vdd and run 8000c40-50 if that passes, then again need cooler ram for 1.5 vdd for 8000c38 or better binned kit that doesnt need 1.5vdd for 8000c38. if fails then more likely need to adjust imc volts.
 
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#23,713 ·
opt33 said:
ram temps are 52C with 1.45 vdd. Increasing to 1.5 for 8000 probably increases temps another ~5+c so may err from high temps. Could try 120mm fan over ram. If already have fan then plastic cover is keeping temps high.

Or keep voltage ~1.46 vdd and run 8000c40-50 if that passes, then again need cooler ram for 1.5 vdd for 8000c38 or better binned kit that doesnt need 1.5vdd for 8000c38. if fails then more likely need to adjust imc volts.
Click to expand...
Thanks! I have a fan already aimed at the Ram.

I'll what you said about the timings/ram tomorrow and get back to you.

Thanks for your help!
 
#23,714 ·
leonman44 said:
Second pass after power cycling , no problem !

View attachment 2645685

Therefore not just a lucky pass , so its either memory temp or a bios related.


@yzonker If you like do the following and see if that solves your issue , i had exactly the same behavior on my Z690 Hero and now i see it on the Z790 Apex as well:

View attachment 2645688

1) Enter bios and save your profile in which you will have A) MRC Fastboot disabled , B) MCH full check enabled and C) Training profile (idk if asus or standard is better just choose one so it remains the same).

2) shut down and press the clear cmos button

3) power cycle just by using the psu switch and press the clear cmos button again when you push the psu switch back on

4) enter bios just put xmp1 and load into windows

5) restart go into bios and load your profile

All instability issues from boot to boot should go away at the cost of slow windows booting , a small price to pay though. Try it and report back.
Click to expand...
Good job! It's time to tighten it. Current timings are really slow, liike a 8200C38 tight profile.
But your IMC can do that, so it won't be an issue to find the new Voltages again. If you are lucky it will be enough to raise only RAM VDD.
 
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#23,715 ·
tibcsi0407 said:
Good job! It's time to tighten it. Current timings are really slow, liike a 8200C38 tight profile.
But your IMC can do that, so it won't be an issue to find the new Voltages again. If you are lucky it will be enough to raise only RAM VDD.
Click to expand...
What primary timings should I first try ?
 
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#23,716 ·
tubs2x4 said:
I would stick to 8000 with tuned timings…be way further ahead then struggling for higher speeds with looser timings.
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Yeah I may go back to 8000. I was suggested to go to 8200 (after struggling with 8000, probably by keeping my volts too low) to learn how voltage scales. So I chose 8200C38

tibcsi0407 said:
Just share your progress, we are here to help. Timings is really important for a good foundation, so we should start with those.
Click to expand...
This is where I am at with timings. I do have tWTR_L/S set to 24/8 (RRD_sd/dg on auto). Asrock Timings shows it as tWTR_L/S 28 and 12 but I am told that is normal? My tRFC's are high, intentionally set that way for now. I used a calculation I found on here to come up with those numbers, but could be totally wrong.

Voltages I need to start a bit over on. I was getting some stability (hour VST+VT3, ALMOST an hour cold boot but it errored out).

VDD_Mem: 1.47
VDDQ_Mem: 1.42
VDDQ_CPU (TX): 1.345
VDD2_CPU (MC): 1.43125
SA: 1.18

But as I mentioned with voltages I am going to start over and try to get some larger deltas, and maybe see if SA can work a bit lower.


Image

Image
 
#23,717 ·
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#23,718 ·
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#23,719 ·
opt33 said:
ram temps are 52C with 1.45 vdd. Increasing to 1.5 for 8000 probably increases temps another ~5+c so may err from high temps. Could try 120mm fan over ram. If already have fan then plastic cover is keeping temps high.

Or keep voltage ~1.46 vdd and run 8000c40-50 if that passes, then again need cooler ram for 1.5 vdd for 8000c38 or better binned kit that doesnt need 1.5vdd for 8000c38. if fails then more likely need to adjust imc volts.
Click to expand...
So I tried, 1.45 VDD with the C40-50 Timings.

Karhu ran for 33 minutes then errored.

Ram stayed around 47.5 degrees.
 
#23,720 ·
LukeJoseph said:
Yeah I may go back to 8000. I was suggested to go to 8200 (after struggling with 8000, probably by keeping my volts too low) to learn how voltage scales. So I chose 8200C38



This is where I am at with timings. I do have tWTR_L/S set to 24/8 (RRD_sd/dg on auto). Asrock Timings shows it as tWTR_L/S 28 and 12 but I am told that is normal? My tRFC's are high, intentionally set that way for now. I used a calculation I found on here to come up with those numbers, but could be totally wrong.

Voltages I need to start a bit over on. I was getting some stability (hour VST+VT3, ALMOST an hour cold boot but it errored out).

VDD_Mem: 1.47
VDDQ_Mem: 1.42
VDDQ_CPU (TX): 1.345
VDD2_CPU (MC): 1.43125
SA: 1.18

But as I mentioned with voltages I am going to start over and try to get some larger deltas, and maybe see if SA can work a bit lower.


View attachment 2645750
View attachment 2645751
Click to expand...
Image


TWTR L/S, try 24/4 instead. On 8200 it should be okay.
TXSR: 746
SA: Start with 1.12V and raise if neccessary in 30 mV steps
TX: 1.30V
RAM VDD/VDDQ: 1.43V should be enough I believe
MC:You can leave it on current value atm
For the good retraining it's good to have a delta between RAM voltages, but at 8200 it should be okay with 1.43V
What kind of sticks you have? I can even pass 8400C38 tight with 1.43V on Gskill 8000 kit, so it should work.

Too much VDD can also cause stability issues.
 
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