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Help! G .skill 48GB 8000 stable parameters

darkiria
Level 9

CPU i9-13900Kf (SP 96)
RAM G .skill 48GB 8000
MB ROG MAXIMUS Z790 APEX (BIOS 2202)
XMP1 and XMP2 are less stable
For example: Battlefield 2024 and Cyberpunk 2077 will all crash~
I am not a person who is good at BIOS field and testing stability with software.
I hope you can help provide a rough setting direction so that I can use the 8000 frequency stably.

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25 REPLIES 25

Are you using one of the ram kits below? 

Screenshot 2024-04-23 195235.png

Z790 Apex Encore, 14900KS, Corsair 7000D, Crucial T705 2TB, Corsair Titanium DDR5 48GB 8200, Asus RTX 4090 OC STRIX, MSI MEG 1300w PSU, Corsair ICUE LINK 420mm 14 QX Fans, Acer Predator X38 S 177hz | Z790 Apex Encore, 14900KS, Corsair Titanium DDR5 48GB 8200, Crucial T700 2TB, Corsair HX1000 PSU, Corsair 5000D, Corsair ICUE LINK 360mm, Asus RTX 4090 TUF, Alienware 38" Curved 144hz

My current kit is: F5-8000J48F24GX2-TZ5RK

 Is this the report?

IMG_2083.jpeg

IMG_2084.jpeg

68 is quite low, which could indicate the CPU IMC is fairly weak and may not be able to achieve 8000MT. 

Set:

XMP II

Extreme Tweaker> CPU System Agent Voltage 1.3v 

Extreme Tweaker > Advanced Memory Voltages > Memory Controller Voltage > 1.5v 

Extreme Tweaker > Advanced Memory Voltages > VDDQ TX 1.46

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

The adjustment has been completed. VOD VODQ remains at 1.35.
Tweak Mode 2 Does this need to be adjusted?
Is VDDQ TX 1.46 the voltage of IVR?

1. Incease VDDQ / VDD to 1.4 - 1.45v

2. Turn off Tweak Mode 2

3. VDDQ TX is IVR, yes.

If still crashing, set CPU System Agent to 1.23v.


However, unfortunately, the MC SP score is quite low which potentially means 8000MT is out of the question for that CPU.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Is there any room for fine-tuning?
I'm still playing now and it crashes after about 10 to 20 minutes....
It also crashed directly when executing the game many times...
Or do you have any suggestions as to how low the frequency should be?

That's an open-ended question and not one that's easily digestible if needing to ask. Voltage alignment where adjustment is needed for overclocking can take time and a methodical approach, as well as a reasonable understanding of what the voltages do.

"How low" isn't anything anyone else can tell you. Given the MC SP score is fairly low, consider lowing the DRAM Frequency to 7800. If still unstable lower until you're able to achieve stability.

I did cover 8000MT last year in this article, but obviously, your mileage will vary.

https://rog-forum.asus.com/t5/push-the-limits/z790-apex-the-8ghz-goal-and-beyond/ba-p/938283

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

If I drop to 7800, will the voltage section remain at the current setting?

Correct. Apply XMP II > adjust DRAM Frequency to 7800MT > Save and Exit.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Okay, I will continue to try, and I also want to know, only for games, will the impact of running XMP only 5600 and 8000 be very big?