Question Enabling XMP causes my PC to have no display

[Victel]

.SKILL Trident Z5 RGB Series (Intel XMP 3.0) DDR5 RAM 48GB (2x24GB) 8400MT/s CL40-52-52-134 1.40V x2​

ASUS z890 pro art
Windows 11
4090
Intel Ultra 9
BIOS Update 1501

My drivers are all updated and my BIOS are updated. Enabling XMP causes my PC to start but I never have a display, it just runs on a black screen and windows never seems to start until I disable XMP again. Any ideas?

 

[geofelt]

Run memtest86+
It boots from a usb stick and does not use windows.
You can download it here:

Memtest86+ | The Open-Source Memory Testing Tool

Memtest86+ is an advanced, free, open-source, stand-alone memory tester for 32- and 64-bit computers (UEFI & BIOS supported)

memtest.org

If you can run a full pass with NO errors, your ram should be ok.
Do this first at stock settings, then at XMP settings.

Some motherboards will run memtest from the tools menu in the bios.

 

[Victel]

Run memtest86+
It boots from a usb stick and does not use windows.
You can download it here:

Memtest86+ | The Open-Source Memory Testing Tool

Memtest86+ is an advanced, free, open-source, stand-alone memory tester for 32- and 64-bit computers (UEFI & BIOS supported)

memtest.org

If you can run a full pass with NO errors, your ram should be ok.
Do this first at stock settings, then at XMP settings.

Some motherboards will run memtest from the tools menu in the bios.

I ran your tests. They say nothing is wrong.

 

[geofelt]

Try connecting the display to to the motherboard and remove the 4090.

 

[JayGau]

Can you reach the BIOS when XMP is on or do you have to do a CMOS reset? A PC that only gives a black screen with XMP on is usually because the motherboard can't run the RAM at its advertised speed. You try to run at 8400 MHz which is very high. After enabling XMP, try to lower the frequency to something much lower like 6600 MHz and see if it boots. If it does, you might have to go through some overclocking optimization to find the highest frequency and lowest timings that would be stable, or replace your RAM with a slower kit.

Also make sure you wait long enough when you enable XMP. The motherboard training can take several minutes.

 

[Victel]

Can you reach the BIOS when XMP is on or do you have to do a CMOS reset? A PC that only gives a black screen with XMP on is usually because the motherboard can't run the RAM at its advertised speed. You try to run at 8400 MHz which is very high. After enabling XMP, try to lower the frequency to something much lower like 6600 MHz and see if it boots. If it does, you might have to go through some overclocking optimization to find the highest frequency and lowest timings that would be stable, or replace your RAM with a slower kit.

Also make sure you wait long enough when you enable XMP. The motherboard training can take several minutes.

I can reach the bios with xmp being on but only after I force shutdown the PC and it goes into recovery mode because I can't get it to start normally. Am I able to just lower the frequency or do I have to change the voltage and timings as well? I will start but letting the PC sit as it hopefully configures the ram.

 

[JayGau]

I can reach the bios with xmp being on but only after I force shutdown the PC and it goes into recovery mode because I can't get it to start normally. Am I able to just lower the frequency or do I have to change the voltage and timings as well? I will start but letting the PC sit as it hopefully configures the ram.

You don't need to touch the timing or voltage for this test. Just lower the frequency. CL40 at 1.4 V should work just fine at lower frequency. I would suggest to start low like 6200 and if it boots, increase by 100 MHz until it stop working. But if you figure out that your RAM runs at a much lower frequency you may want to play with the timing to get something thighter. But if you don't want to go through this trouble you could just replace the kit with a slower one. As I said 8400 MHz CL40 is really fast and I wouldn't be surprised your board can't run that.