I've been troubleshooting an issue with my motherboard that gets stuck on code FF when I try to use all four of my RAM sticks at once. For context, I'm using an ROG Crosshair X870E Hero motherboard paired with an AMD Ryzen 9950X CPU and two pairs of Crucial DDR5 RAM (the model is CP64G56C46U5.M16B1). The motherboard boots fine when I use one pair of RAM, but as soon as I insert both pairs, it won't post. I'm hoping to get some insight here on what's going wrong. Thanks!
2 Answers
You're running into typical DDR5 issues. The specifications may say it supports a maximum capacity, but achieving that with mixed kits can be a challenge. Stick to a two-DIMM setup for better performance and less hassle.
Currently, DDR5 isn't very compatible with setups using more than 2 RAM sticks. If possible, consider returning your sticks for a dual-DIMM kit which should work more reliably. You’ll find that many users are facing similar issues with multiple DIMMs on DDR5 platforms.
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