ROG Strix Z690-g, Intel Core i9-14900K 4x DDR5, POST failure, pipe dream?

[roguzdon]

Hayo, built a new mATX gaming/workstation, bios updated, Im using 4x 32mb DDR5 from the QVL list-

Kingston

KF552C40BBAK4-128

4x 32GB

2x sticks will boot without issues. With 4x sticks it will fail POST hang red light, orange light about 90% of the time. On some occasions it will boot. Ive tested everything individually so I have ruled out hardware failure; XML on/off doesnt make a difference.

Is it a pipedream getting 4x DDR5 to work?-- am I better off just calling it and going 2x 48mb DDR5? Are there bios settings that could sort this out? Orrrrr am I trying to put too much into this somewhat old mobo?

[roguzdon]

PCPartPicker Part List: https://pcpartpicker.com/list/TqxLpK

CPU: Intel Core i9-14900K 3.2 GHz 24-Core Processor 
CPU Cooler: EK EK-Nucleus AIO CR360 Lux D-RGB 72 CFM Liquid CPU Cooler
Motherboard: Asus ROG STRIX Z690-G GAMING WIFI Micro ATX LGA1700 Motherboard 
Memory: Kingston KF552C40BBAK4-128
Storage: Samsung 990 Pro 4 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive 
Video Card: PNY XLR8 Gaming EPIC-X RGB GeForce RTX 3090 24 GB Video Card 
Case: Corsair 2500D Airflow MicroATX Mini Tower Case 
Power Supply: SeaSonic VERTEX PX-1200 1200 W 80+ Platinum Certified Fully Modular ATX Power Supply 

[Silent_Scone]

Hi @roguzdon 

4 DIMMs is always going to be a tougher ask on the memory controller. 

If the system is occasionally passing POST stress tests, then you'll likely be able to dial in stability.

Key voltage rails for memory tuning listed below. I would first try increasing Memory Controller Voltage by 20 to 40mV. (Extreme Tweaker > Advanced Memory Voltages)

VDDQ 
VDD 
VDDQTX 
CPU System Agent 
Memory Controller Voltage 

[roguzdon]

Hey thanks for the direction, I'll give it a shot