how much performance loss in running uclk=memclk/2 vs 1:1 on AM5?

rcarlos243 · January 1

most AM5 can do DDR5 6200 with uclk=memclk 1:1

using uclk=memclk/2 allows to run a much faster RAM, but running 2:1 has a performance penalty

what speed and timings would be needed to have more performance from a setup with DDR5 6200 28-35-35-30 with 1:1 vs a faster RAM with 2:1?

RONOTHAN## · January 1

24 minutes ago, rcarlos243 said:

what speed and timings would be needed to have more performance from a setup with DDR5 6200 28-35-35-30 with 1:1 vs a faster RAM with 2:1?

At least 7600MT/s to have it trade blows, 8000 for it to be better all around. Getting 8000MT/s to work on AM5 is next to impossible and not worth the effort.