X670E-E Gaming WIFI DDR5-8000 instability

[Swagtemplate]

Hi all,

I´ve build a new computer with an AMD Ryzen 7950X3D and G.SKILL F5-8000J4048F24G x2. The RAM is in the QVL list of the motherboard. I used slot A2 and B2 as requested in the manual.

In the beginning I missed to setup the 8000 in BIOS and it run with 5600 by default. I don´t see any issue while working with it, but sometimes while shutdown from windows I received RAM errors. Therefore I checked the BIOS and setup the DOCTP 1 profile so the 8000 Mhz gets detected. Then I´m downloaded the MEMTEST86 from  passmark software to check how stable the RAM is running. 

And then I get lots of errors, so the expected value differs from actual one but only in one bit of an uint32 value. So guess there is an timing issue.

Then I updated the BIOS to the current version 2506 and reset also CMOS via coin cell plug/unplug to load the default settings.

Then I restart the test and there are less errors but still the same, one bit doesn´t match. I also tried DOCTP2 and DOCTP-Tweak but still erros. Therefore I switched back to DOCTP1 which is the requested one.

I repeat the test with only using one slot A2 and tried with both RAM sticks and the test passes after 3 hours.

After that I repeat the test in slot B2 and tried with both RAM sticks and the test passes again.

So I only receive errors when using both RAM sticks at the same time. I´m a little bit confused because each of the DDR works fine and als the motherboard slots are working as expected.

But as mentioned in the beginning the RAM is listed in the QVL list and also 2 times therefore I would expect it should work.

Any idea how to deal with that?

[Robert_Hsu]

It seems like the VDDIO, VDDQ and/or VDDP droop when plug in two DIMMs. Try adjusting those voltages a bit up or down to find if it works. The voltage is not always the higher the better. It varies from CPU to CPU and mobo to mobo. 

[Swagtemplate]

I will try it and give feedback, thanks for the hint.

[Silent_Scone]

Hi @Swagtemplate 

Best performance is found at 1:1 UCLK. Is there any reason you want to run 8000MT/s?

1. The higher the frequency, the more chance manual tuning may be needed.

2. Best performance is found between 6000MT and 6400MT/s 1:1 UCLK.

3. Test DRAM stability with Karhu RAM Test or HCI Memtest Pro.

[Swagtemplate]

I decided to buy this DDR because it was mentioned in the memory support of the mobo. Therefore I expected it works without issues.

[Robert_Hsu]

I have a set of same series kit but mine is 7800MT. I also have stability issue and is playing around with a relative relax timing and different voltage settings. I start from low voltage and slowly add up one by one to see the difference. 

My system can enter the system with quite low voltages. Like VSOC 1.00v, VDDP 1.00v, MEM VDD 1.45v which is default, VDDQ 1.26v, VDD MISC 1.1v.

But this will cause instant fail in TM5. Add a little bit on VDDP can last for 2mins or so. Now I'm trying to add other voltages to see if it helps. If not, I roll back and try other voltages else. 

[Silent_Scone]

Unfortunately, that's not how overclocking works due to running things out of spec. Purchasing a memory kit near at the very top of the frequency validation table can sometimes have some concessions depending on the strength of the CPU MC and manual tuning can often be required. You can try raising vSOC incrementally as a starting point.

You'll have to see what works for you. As I said, 1:1 with the CPU Fabric still makes the most sense for performance.

More info on XMP/EXPO here

[Robert_Hsu]

 excuse me, this is the ROG forum. It is  suppose to talk about the most extreme overclocking. If you say like this, then you are not suitable to be a moderator here tbh.

[Silent_Scone]

Very spicy of you 😅

But that's ok;
If we want to go down that road, let me put it to you this way - what conforms the reasoning for why maximum validation on QVL, is maximum validation?

If we entertain your strange attempt at gaslighting, every CPU should be able to achieve the same results - is that right?

Overclocking is about exploring the limits of your hardware and optimising performance, but it also means understanding the trade-offs and constraints. This isn't a limitation of a moderator's explanation but rather a reflection of physics and engineering. 

Overclocking would be extremely dull if everyone could achieve identical results. Somewhat ironically, you mentioned extreme OC. I don't think anybody is talking about XOC here. Which is even more applicable to this point.

Some diluted explanations here

[Robert_Hsu]

If there's a potential that some pcs of hardwares no matter CPUs or motherboards may not successfully run at those parameters. Then put that memory kit out of QVL!

What QVL is the guys in the R&D lab test and validate that even the worst binned CPU can run that frequency/ timings/ voltages without problem. 

We use the QVL list to decide which product on the market is the way to go. If ASUS's QVL means nothing, then we may assume ASUS as a scam company.  Simple.