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

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#9,303 ·
Dodgexander said:
Is this VDD IMC or just VDD CPU in my BIOS?
If you see my last post there's some screenshots of the Asrock BIOS:
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*Official* Intel DDR5 OC and 24/7 daily Memory Stability...

Let it begin, boys... @cstkl1 @Nizzen @PhoenixMDA http://www.adata.com/us/ https://gskill.com/ There's this guide: MemTestHelper/DDR4 OC Guide.md at oc-guide · integralfx/MemTestHelper While it's written for DDR4, and the specific timing recommendations don't really apply...
www.overclock.net www.overclock.net
Click to expand...
It should be the CPU one. I don't how ASRock call it but you will see it in Hwinfo.
 
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#9,308 ·
Dodgexander said:
@tibcsi0407 I think raising the TX voltage helped. Thank you. Default 1.1v is not enough for XMP with my RAM. In BIOS I raise both VDD CPU and VDD CPU IMC.

Is this fluctuation of memory VDD normal?
View attachment 2582762
Click to expand...
That was too low. It is your CPU IMC voltage, should be around 1.3V, if you have not that good IMC, you should raise it, but for the low speeds of Micron 1.3V should be enough.
Yes, it is normal. Did you left it on auto?
 
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#9,309 ·
tibcsi0407 said:
That was too low. It is your CPU IMC voltage, should be around 1.3V, if you have not that good IMC, you should raise it, but for the low speeds of Micron 1.3V should be enough.
Yes, it is normal. Did you left it on auto?
Click to expand...
Yes, I assumed that setting an XMP profile and leaving the voltages on auto would raise it automatically. But honestly the terminology used in this thread is confusing to me because Asrock seem to name their options illogically, or the opposite to terms used here. Thanks to your help and some testing I have figured it out.

In case anyone needs help in the future translating terms people mention in this thread into Asrock BIOS language:
Known TermsAsrock BIOS LanguageHWInfo (Asrock)
MC or IMC VoltageCPU_VDDCPU_VDD
VDDQ TXCPU_IMCVDDQ TX
Luckily, memory VDD and VDDQ are the same.
System Agent (also known as SA) is not in voltage section on Asrock boards, but instead hidden inside the F.I.V.R section. To increase it to a custom number you have to set mode to override and key in the voltage there. Alternatively, you can keep adaptive mode and key in an offset if you're happy with the SA voltage being dynamic.

If you're anything like me setting an XMP profile will not adjust CPU_IMC or CPU_VDD beyond 1.1v and the board is not 100% stable in tests without boosting these voltages manually.

I will leave my VDDQ TX and MC to 1.3 and test overnight, but today at work it was finally 9 hours stable at XMP without a system restart.
 
#9,311 ·
rs199208 said:
7400 stable with 6400 XMP auto/default settings plus .020V added to linked dimm voltages.

I'm having trouble stabilizing 7600. It just BSOD when I run aida64 bandwidth and latency bench.


View attachment 2582810
Click to expand...
Maybe you should lower your SA and TX, those are too high.
 
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#9,312 · (Edited)
Daily profile on EVGA Z690 DARK Kingpin & Intel i9-13900KF + Hynix m-die (Kingston Fury renegade 6400 c32)

Stable :

Black Font Screenshot Technology Software


7200 c32-42-42-28 (m-die)
SA: 1.1v
VDD : 1.54v
VDDQ : 1.45v
VDD2 (IMC) : 1.54v
VDDQ TX : 1.4v

Benchable profile :

Computer Font Screenshot Software Rectangle


7600 c32-42-43-28 (m-die)
SA: 1.2v
VDD : 1.66v
VDDQ : 1.63v
VDD2 (IMC) : 1.62v
VDDQ TX : 1.4v


Font Screenshot Technology Electric blue Parallel


Almost same profile but for Y-cruncher.
Had to loosen a bit :

7400 c32-44-44-28 (m-die)
SA: 1.2v
VDD : 1.66v
VDDQ : 1.63v
VDD2 (IMC) : 1.62v
VDDQ TX : 1.4v

Computer Font Screenshot Software Personal computer


8000 C32-44-44-28 (m-die)
SA: 1.35v
VDD : 1.70v
VDDQ : 1.66v
VDD2 (IMC) : 1.64v
VDDQ TX : 1.4v

Just got my CPU this weekend so it's just the beginning
 

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#9,314 ·
rs199208 said:
7200 tm5/absolute stable using 6400 XMP auto /default settings and voltages other than raising these primaries 34 42 42.
While saving around $170 by returning the 7200 kit lol! I need to clean up the timings now or go higher frequency?

Edit: tm5/absolute started on 7400!! No errors yet and no changes to settings!
View attachment 2582742
Click to expand...
Nice, just ran my 6400 A-dies at 7200cl34 in 1h memtest86 stress in asus bios without issues. Have to bench further but they are giving me similar results to the about 150eur more expensive 7200 rated g skill I also have tried.

For my bench I'm using the XMP profile from the 7200 kits since I had that saved in my bios since before. 34-45-45-115, Trfc 576.
Voltages:
SA: 1.175
CPU VDDQ TX: 1.32
CPU IMC: 1.36
RAM VDD/VDDQ: 1.4 (stock)

I have a very hard time finding stabilty if I start increasing dimm voltages. Not sure if its me not finding right balances, or my platform (mb/cpu) that doesnt want to take it. So not sure I can go higher as I would assume the dimms would want more voltage running at higher freqs than just stock 1.4.

Anyone with ideas on the voltage issue? I've tried keeping the CPU voltages (vddq tx, sa, imc) low, high, auto, and tried to have them proportionally increase with the dimm voltages. For instance, if increasing vdd and vddq to 1.5 (7% increase), I've tried the same with SA and VDDQTX. But nothing seems to work at higher voltages. Also tried increasing imc voltage to cater for higher freqs, but with no luck. And oh, I've noticed that my system really like keeping SA low. The bench above that passed memtest did not pass with SA set over 1.2, by lowering to 1.175, it passed.
 
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#9,315 ·
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#9,319 ·
droid99 said:
Guys, can you overclock hynix a-die ram with undervolted 13700K (for low temps and power)?
Click to expand...
It's pretty much meta for gaming. Stock cpu + max oc ddr5 :)
 
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