[SOLVED] Trouble with activating XMP profile using G.Skill Ripjaw V 4000mhz

[Geoff Leven]

Firstly specs:

Gigabyte z390 aorus elite rev 1.0 (bios F9)
i9 9900KF
G.Skill Ripkjaws F4-4000C18D-16GVK (timings 18-22-22-42)

So, the default XMP profile that I try to activate in the bios just doesnt boot period, the furtherest Ive gotten is the cycling windows loading circle then it freezes.
After some initial digging I found this PDF (https://download.gigabyte.com/FileList/Memory/mb_memory_z390-aorus-master_191113.pdf) mentioning the memory I currently have which has different timings, which are: 18-19-19-39 @ 1.35v

So I just simply adjusted the timings and voltage to match the information in the PDF and now I can boot to windows. However checking the memory info with CPU-Z
it is reporting memory is running @ 1800mhz. I understand I need to double this number which gives me a working clock speed of 3600mhz.

I have zero experience overclocking memory nor understand how timings work, actually its going to be some good research for myself over the xmas break.
In the meantime could someone possibly shed some light on this matter and tell me if there is any hope of getting RAM running at its advertised speed of 4000mhz.

Thanks in advance.

 

[Geoff Leven]

So I went ahead and purchased this memory:
https://www.amazon.com.au/dp/B07XC3...are-au-6923427623390333000-20&geniuslink=true

I can get it boot into windows and all seems mostly fine IF I apply the XMP profile and MANUALLY set the multiplyer to 4000mhz. My PC did fail POST once this morning, however resetting and doing as I just explained will make the PC boot fine again... For now...

 

[Darkbreeze]

Ok, so with very high speed memory kits sometimes the profile voltage isn't enough for every configuration. Try bumping the DRAM (Memory) voltage UP by about .020v, and see if that solves the issue with it not wanting to post sometimes. If it does, then I would also go into the BIOS afterwards, once you've had several successful POSTs, and set the "memory fast boot" or "boot type" setting in the advanced memory settings to fast or enabled or whatever it's called in your BIOS version. That way it just uses those exact settings, automatically, every time it boots, instead of going through the memory training process every boot which might result in different settings on one occasion than it does on another, especially based on whether it's a cold or warm boot, and also it speeds up the boot process.

 

[Geoff Leven]

Something I never quite understood, in my BIOS with every setting that I can adjust, it has 2 columns. For example with DRAM voltage, it has Auto and 1.2v. Does this mean base voltage is starting at 1.2v and adjusted automatically? or something different? If I were to adjust the voltage in the BIOS then obviously its then hard set to this right? However if I boot up HWINFO64 and check the DRAM voltage its reporting DDR voltage @ 1.395 on average?

 

[Darkbreeze]

One column shows you what the standard default value normally is, while the other is what the current setting is. So if one says auto and the other says something else, then whatever else it says is what it decided to "automatically" settle on as a setting.

If the default value in column one for example, says 4.5Ghz and column two says 4.00Ghz, then it's likely because you've set that CPU multiplier to 45 elsewhere or set that frequency value to 4.5Ghz. Like you see below. Generally the value shown on the left will either be the default value, and the value on the right will be the same, or the value on the left will be YOUR value that you input, while the value on the right will be what the stock value would have been, or the value on the left will be Auto and the value on the right will be whatever value the motherboard "auto" decided to make it based on it's configuration and the default hardware table choices, and whatever other factors help the motherboard to determine the best configuration such as training or trial and error.

See here, my setting is CPU clock ratio of 45 (4.5Ghz) while the default stock value would be 40 (4Ghz).

 

[Darkbreeze]

Where you see "Auto" you can often simply click in to that field and then type your value. Then hit enter when done so that it "sticks". But voltages rarely ever "stay" at "exactly" what they are set at. There are things like vdroop and calibration, load, even temperature can have an effect on whether voltage settings for any given thing are static, semi static or broadly fluctuating. Also, user settings and power plan settings have an effect in many cases.

 

[Geoff Leven]

Alright, So if in the BIOS the DRAM voltage is saying Auto - 1.2v, I should try bumping the voltage to 1.22v? (Regardless of what HWINFO might be reporting because as you mentioned the voltage can fluctuate as a result of many factors)

 

[Darkbreeze]

If you have enabled the XMP profile, the voltage SHOULDN'T be saying "auto" OR "1.2v. It should be saying 1.35v or possibly even something greater than that.

I would go into the BIOS and enable the XMP profile, then go to the exit tab and save settings, then WITHOUT exiting the BIOS, go BACK to the memory voltage sub menu tab section of the MIT tab, and set the DRAM voltage to 1.35v which is what it should be set to per the specifications for that memory kit's XMP profile. As seen below, for a different (Z170x-Gaming 5) Gigabyte motherboard. Settings should be somewhat similar. Had to set the memory to 1.38 on this system as I was running 4x 8GB and it would not run at it's full rated speed at the XMP profile voltage of 1.35v. Note that the 1.2v seen in the right hand column is not for the default XMP profile voltage, but for the DEFAULT native JEDEC configuration known as the SPD (Serial presence detect) which is basically the JEDEC (Joint Electron Device Engineering Council, or basically, the organization that oversees the assignment of standards for a variety of things including consumer DRAM products) version of an XMP profile and there are normally a few of those coded onto the module which it will generally default to upon first installation and boot up.

If your memory is set to 4000mhz at 1.2v, it's no wonder it's not working correctly.

 

[Geoff Leven]

How do I attach a photo without uploading to an image hosting site first?

Regardless, actually I think the DRAM voltage is set to 1.4v as this is whats displayed in a seperate panel under RAM on the right in the BIOS screen. But it was confusing me where its still displaying in the configurable settings where its says AUTO - 1.2v.

 

[Darkbreeze]

You can't. I recommend creating an account at imgur.com, then upload the image to your account there, then click on the image and copy the "direct link" link from the code options to the right.

Yes, we need to SEE what you are seeing.

If you follow my guide, it's fairly simple.

How to PROPERLY post images on the Tom's hardware forum​