ROG STRIX Z790-F GAMING WIFI and Manual Settings for 7600 DIMMs

[jgkurz]

Hello, I am struggling to get my new G.Skill F5-7600J3646G16GX2-TZ5RS 16GB DIMMs to pass memest. I have a Z790 based ROG STRIX Z790-F GAMING WIFI board with a 13700K CPU. The BIOS is the latest at 2801. The DIMMs are on the ASUS QVL. I am not a gamer but I do need a fast and stable PC. The only way I can get a clean memtest pass is by disabling XMP. I would like try manual memory settings but the specific BIOS settings are not easy to find. Is this a problem with G.Skill, ASUS, or the Intel CPU? I am willing to try manual settings if someone can assist. I am also willing buy my way out of this but I want to be sure on success. 

Any recommendations? 

[Nate152]

Hello jgkurz

There are 5 voltages that will help stabilize your high speed DDR5 memory.

Your memory part number shows the voltage at 1.40v, so here's what I'd try.

In the bios in the AI Tweaker tab:

1) Set the Ai Overclock Tuner to XMP 1.

2) Scroll down and enable "High Dram Voltage Mode".

3) set Dram VDD voltage - 1.45v

4) Set Dram VDDQ voltage - 1.45v

5) Set CPU System Agent voltage to 1.30v.  (If still unstable after trying the settings, you can take this up to 1.35v. Some cpu's show signs of instability if this voltage is set too high, this voltage is a touchy one). 

At the bottom of the Ai Tweaker page, click Advanced Memory Voltages:

6) Set IVR Transmitter VDDQ voltage - 1.40v

7) Memory Controller voltage - 1.40v

8: Hit F10 and Enter to save and exit.

I can't guarantee full stability, but see if the test has improved or passes.

[jgkurz]

Thank you so much for the guidance. I will make the adjustments and report back.

[jgkurz]

@Nate152  Thank you again for the guidance but I was not able to stabilize my system with the G.Skill 7600 DIMMs. I went back to slower Corsair 5600 DIMMs and the system is stable again. I could probably keep tweaking voltages to get the GSkill DIMMs stable but I'm out of patience for now. I may revisit later. 

New question: Is it possible to buy high speed DIMMs that DO NOT require voltage tuning to be stable?

[Nate152]

That's a tough question because it comes down to the quality of your cpu's memory controller.

Since 7600Mhz is a struggle, you could try a lower frequency, 7400MHz, 7200MHz, 7000MHz, this would still be faster than 5600MHz.

I personally haven't run a memory test on my system.  If I'm able to boot to windows, I'll play a game. If no errors or BSOD's, I'll call it good.

You could try this too.

[jgkurz]

@Nate152  Thank you. I have noticed that some memory manufacturers have difference levels of memory. Pricing aside, is there any benefit to higher quality DIMMs? In other words, do higher quality DIMMs provide more stability?  

[Nate152 · Accepted solution]

Higher quality Dimms such as G.Skill have good heat spreaders which helps keep temperature lower and can help with stability. Aside from that, I'd so no as memory kits are tested and validated to run at their specifications.

The i9 cpu's (12900k, 13900k, 14900k and ks models) have the strongest memory controllers. You would have a better chance of hitting 7600MHz with one of those cpu's.

[jgkurz]

@Nate152  I took your advice and upgraded to the i9-14900K and changed over to Corsair dominator® titanium DIMMs. Newegg had a decent trade-in for my 13700K. The upgrades were expensive but now I have eliminated memory errors and the system is running at 7800 with no issues. Stability and performance was the main concern with this system instead of cost. Goal achieved... Thank you.