Ryzen RAM Query

[aaronjlaw]

Hi all,

I recently posted about needing a new system and I have built my Ryzen 5 rig!

All is well however my RAM frequency has defaulted to 2133mhz although I know my setup can do more.

I have these components:

Corsair Vengeance LPX 16GB (2x8GB) DDR4 PC4-21300C16 2666MHz Dual Channel Kit - (CMK16GX4M2A2666C16)
ASUS PRIME X370-PRO - AMD RYZEN ATX Motherboard

I have updated my Asus board to the latest BIOS but do I need to change voltages and frequencies manually myself as still defaulting to 2133mhz...

Any help appreciated, thanks!

 

[aaronjlaw]

For the moment most motherboards struggle to autodetect RAM at the correct settings and boot under ryzen.

The simplest approach is in your BIOS just chose the speed you want and reboot. My 3200 RAM booted at 2133 on auto, while it won't yet run at 3200 it boots normally on 2933 once I chose that speed in the BIOS.

I changed it pre-BIOS update and it wouldn't boot so I had to clear CMOS.

With the latest BIOS you reckon this is the best approach? I will try it again...

 

[aaronjlaw]

Don't know if you sorted this yet, but go into the BIOS, head over to Ai Tweaker change from Auto to DOCP. Next dropdown, set the RAM speed you want to try. Then go down and change your memory voltage from auto to 1.35V

Thanks, it didn't go into the boot loop but did randomly cut out when using my PC so took it down to 2400Mhz and it seems stable currently...