Code 55 and blank screen when trying to boot ROG Maximus Hero Z690 4 4 sticks of ram

[dece]

OS Windows 11 64
MB Asus ROG Maximus Hero Z690
CPU I7-13700K
Ram Kingston Fury Beast RGB 32GB 5600MT/s DDR5 (KF556C40BBAK2-32 ) 4x16G
PSU 850 Watts PSU

I recently purchased the Asus ROG Maximus Hero Z690, along with Kingston Fury Beast RGB 32GB 5600MT/s DDR5 (KF556C40BBAK2-32 ) 4x 16. The ram was on the QVL for this motherboard(for 2x16). How do I configure the Bios to accept all four sticks of DDR 5 at 5600 (or 4800)MT/s?

When I run 4 sticks I receive the following Q codes: 12>28>54 and then it ends on 55 w/blank screen. The MB does boot with either one or two sticks(DIMMS) in channel B1 and B2 only; i get the 55 code when using the same in A1 and A2 channels. I've since exchanged the MB and Ram(G.Skillls), but the same is happening for the new MB and Ram. Any assistance would be greatly appreciated.

My setup:

OS Windows 11 64
MB Asus ROG Maximus Hero Z690
CPU I7-13700K
Ram Kingston Fury Beast RGB 32GB 5600MT/s DDR5 (KF556C40BBAK2-32 ) 4x16G
PSU 850 Watts PSU

[Jiaszzz_ROG]

Hello, @dece 

Could you please confirm the current BIOS version, and have you updated the Intel ME to the corresponding version in the BIOS?
For example, the latest BIOS version of the ROG MAXIMUS Z690 HERO is 2802, which requires updating the Intel ME to 16.1.30.2264.
Regarding the memory, we recommend that you refer to the installation guidelines in the ROG MAXIMUS Z690 HERO user manual.
Start by installing a single memory module in the DIMM_A1 slot and then attempting to boot.
Once stability is confirmed, proceed to add additional memory modules, one at a time, up to two or four modules.

Here are the relevant links for your reference:
[Motherboard] How to update BIOS of the motherboard ?(Include different generation CPU)
[Motherboard] Intel® Management Engine Firmware Update Instructions(ME)
[Motherboard] Common Q-CODE(Error CODE) and Troubleshooting

Thank you.

[dece]

Thanks. i did have the latest Bios(2802) along w/Intel ME 16.1.30.2264 installed, I couldn't the DIMM to work in Slots A1 & A2 under any configuration. Because I couldn't afford any more down time-I just the B slots for now.