After upgrading the CPU, the system starts up using just one stick of RAM.
After upgrading the CPU, the system starts up using just one stick of RAM.
Hello, I set up the system about five years ago and it has been functioning well. I haven’t attempted any overclocking yet, but now I’m facing a problem when trying to modify the CPU.
I’m using an ASUS PRIME B450M-K with a Ryzen 5 3600, Corsair DDR4 3200 2x16GB (CMK32GX4M2B3200C16), Asus GeForce RTX 2060, Seasonic CoreGC 500W PSU. Recently, I decided to switch the CPU to a Ryzen 7 5700X (tray version, kept the original fan from the boxed Ryzen). However, the system won’t boot with this new CPU unless I remove the RAM stick in slot B—only the fans and LEDs are active, no beep and no display output.
The system operates correctly with any stick in slot A, but it fails if both slots (or just slot B) are used. I tried using the old CPU and a single stick in slot B before; it worked.
The new CPU appears to be in good condition—no bent pins, dust, or incorrect thermal paste. The AM4 socket looks fine too. BIOS is up to date (version 4622, and Ryzen 7 5700X should be supported since version 3211 on that board per the Asus site).
Other attempts in BIOS:
* Clearing CMOS
* Enabling XMP with the DD4 3200 profile (didn’t succeed)
Then, with the DD4 3200 profile still active, I increased the SoC voltage from the default (1.0V) to 1.1V, but now I’m getting one long or two short beeps (memory issue). It seems like I’m making some progress, but I’m unsure how to proceed without risking damage.
Appreciate any advice!
The BIOS was updated some time ago, prior to the CPU replacement. There has been no new release from ASUS since then. The power supply was replaced with a new one in 2020. The CPU is cooled using the AMD fan from the previous boxed CPU plus Arctic MX6 thermal paste.
After locating the AM4 pin arrangement and inspecting the CPU pins linked to memory channel B more closely using a magnifying glass, I noticed pin A37 was misplaced (possibly over-tightening the fan screw in that area!). Once I carefully reinserted it with pliers, the system started booting up with both memory drives working. 😊