- Dec 5, 2015
This has nothing to do with "isolating the BCLK".Turns out the base clock generator will allow for higher RAM overclocks right now.
The way AMD has their BIOS set up, you cannot yet change the memory timings. The high multipliers have very loose timings. The base clock generator allows for higher timings by isolating the Base Clock of the RAM from the CPU and then allowing you to use a lower multiplier by using a higher base clock. That in turn allows for higher memory overclocks, while keeping it at looser timings.
It might be an advantage considering DRAM is the last level cache.
Buildzoid has a pretty good video about it:
It may be best to tweak to the setting you like then disable the HPET.
There are various bugs & issues in the current AGESA / PMU firmware version.
The higher memory ratios have not been working (even remotely) until very recently and they still have some pending issues.
In order to reach higher MEMCLKs it is currently better to use the lower memory ratios, which have been available since the beginning and therefore are fully functional and validated.
Using lower memory ratio of course means that the only way to reach high MEMCLKs is to increase the BCLK. The same exact thing can be achieved with the internal clock generator.