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EXPO vs XMP on AMD Ryzen | UCLK, MCLK, FCLK explained (youtube.com)

submitted 10 months ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 9 months ago

On Zen 4, running UCLK and FCLK at the same frequency provides no memory latency reduction.

This is incorrect, it's a very substantial latency step reduction and offers ideal performance in certain workloads. 8000/2000/2000 tests lower latency than 8000/2000/2200 and around 4ns lower than 8000/2000/2033.

There's even a flag in ryzen master which shows if uclk=fclk sync mode is active or not.

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