Question PC wont boot with 4 sticks of ram, but boots with 3

[axizznewgen2]

CPU: Ryzen 2600x

MB: ASrock b450 pro4 bios version 1.50

GPU: RX 5700 XT



Hello, my probelm is that I had 16gb of ram, 2 sticks of 8gb bought at separate times but with exact same model (Hyperx fury 8gb 2400mhz 15cm) and they worked perfectly fine on my motherboard in dual channel. I decided to add 16 more gb of ram so I have a total of 32gb of ram (4x8), i bought exact same ram and installed it into my pc and pc wont boot, ive tried all ram sticks and ram slots, everyting works fine so the probelm isnt in ram hardware. After multiple restarts PC booted with 4 sticks of ram and I went to bios and saw that all 4 sticks of ram were detected in single channel, I restarted the pc again and it didnt boot since, it just keeps restarting. If I leave 3 ram sticks in any order the pc will boot fine and I will have 24gb of ram in single channel mode, old ram runs in dual channel mode with new so I'm not sure if its compatibility issue. I was wondering if I should update my bios and to which version?

 

[cherry blossoms]

Your exact memory model wasn't specified. The QVL for your board suggests that SOME Hyper X kits can run with 4 sticks, others only 2.

https://www.asrock.com/mb/AMD/B450M Pro4/index.us.asp#Memory


AMD AGESA support added more memory options in updates. As a troubleshooting step, it may be helpful to upgrade your BIOS.

BIOS updates for your MB appears to need some prerequisistes. Read and apply carefully.

https://www.asrock.com/MB/AMD/B450 Pro4/index.asp#BIOS

 

[Calvin7]

Those kind of combinations have no guarantee to work. Memory manufacturers will guarantee compatibility for memory in the form sold and not in any other combinations you decide to make.