RAM stuck on 2133Mhz (X570 AORUS Pro + Gskill trident-z 4000Mhz)

[grassHopper88]

Got myself the following setup:

• Gigabyte X570 AORUS Pro (F30 BIOS)
• Ryzen 3900X
• G.SKILL Trident Z 32GB 4000Mhz (QVL qualified)

I'm trying to OC the RAM frequency up to 4000Mhz, but it's being stuck on 2133Mhz, no matter if an XMP profile or a custom OC are applied.

Attempt 1:
Using XMP profile (tried with multiplier set to auto, then 40):

F30 interface

Attempt 2:
Custom OC. I OC'd with the following settings:

• Memory clock speed: 2000Mhz (I red online it should be half the total speed, so 4000/2 = 200Attempt 2:
• DRAM Voltage: 1.4V
• Infinity fabric frequency: 2000Mhz, then auto

In the photo: DRAM timing configuration (found under Settings -> AMD Overclocking -> DDR and infinity fabric frequency/timing -> DDR frequency and timing -> DRAM timing configuration)

I tried messing around (a lot) with the DRAM voltage, clock multiplier etc. , but the RAM frequency always stays on 2133Mhz. I'm on the brink of
going nuts over this, please help!