Question 6400Mhz RAM works at 4800 ?

spartaks2000

Honorable
Mar 21, 2018
84
2
10,545
I bought 6400mhz cl 32 (2x16) because my ASRock A620M-HDV/M.2 motherboard supported it,
but on xmp profiles I have 3 - 6400 cl 32 6200 cl 34 and 6000 cl 30, none of them works and I’m not expert to do manual. The kits are Viper Venom.

Questions

Q1: Should I return the kits and get qvl kits ?

Q2: Should I get officially supported 5200Mhz RAM or there is chance to fix it manually?
Q3: if I upgrade cpu can I use my current ram at 6400mhz?
 
Last edited:
I bought 6400mhz cl 32 (2x16) because my ASRock A620M-HDV/M.2 motherboard supported it,
but on xmp profiles I have 3 - 6400 cl 32 6200 cl 34 and 6000 cl 30, none of them works and I’m not expert to do manual. The kits are Viper Venom.

Questions

Q1: Should I return the kits and get qvl kits ?

Q2: Should I get officially supported 5200Mhz RAM or there is chance to fix it manually?
Q3: if I upgrade cpu can I use my current ram at 6400mhz?
What cpu are you using?
 

Eximo

Titan
Ambassador
Every CPU and Motherboard combo is going to be a little different. Getting an A620 chipset wasn't wise as this is the very budget solution. If your memory isn't on the QVL or tested list, no guarantee it can achieve higher speeds.

You may need to tweak voltages a little higher to get the memory working at its rated speed.

6400 is a bit a of stretch at 1:1 for the memory controller. Not generally recommended for AMD builds. Decoupling the memory clock to 2:1 adds a lot of latency and can only be compensated for with speeds in excess of DDR 7200, which Ryzen doesn't play that well with to start.
 
  • Like
Reactions: spartaks2000
I bought 6400mhz cl 32 (2x16) because my ASRock A620M-HDV/M.2 motherboard supported it,
but on xmp profiles I have 3 - 6400 cl 32 6200 cl 34 and 6000 cl 30, none of them works and I’m not expert to do manual. The kits are Viper Venom.

Questions

Q1: Should I return the kits and get qvl kits ?

Q2: Should I get officially supported 5200Mhz RAM or there is chance to fix it manually?
Q3: if I upgrade cpu can I use my current ram at 6400mhz?
Proper bios?
 
  • Like
Reactions: Fix_that_Glitch

spartaks2000

Honorable
Mar 21, 2018
84
2
10,545
Every CPU and Motherboard combo is going to be a little different. Getting an A620 chipset wasn't wise as this is the very budget solution. If your memory isn't on the QVL or tested list, no guarantee it can achieve higher speeds.

You may need to tweak voltages a little higher to get the memory working at its rated speed.

6400 is a bit a of stretch at 1:1 for the memory controller. Not generally recommended for AMD builds. Decoupling the memory clock to 2:1 adds a lot of latency and can only be compensated for with speeds in excess of DDR 7200, which Ryzen doesn't play that well with to start.
Thank you, ended up returning ram and motherboard for ASRock b650m pro rs and qvl supported ram