DDR5-6000 allegedly ‘sweet spot’, RAM tuning options revealed


from Benjamin Grundken
According to a report, DDR5-6000 is said to be the “sweet spot” for Ryzen 7000 processors. Meanwhile, Yuri “1usmus” Bubliy, the creator of “DRAM Calculator for Ryzen”, reveals the new platform’s RAM tuning capabilities.

The colleagues from Wccftech have asked around again and would like to have found out that the memory “sweet spot” on the Ryzen 7000 platform is DDR5-6000. The ratio between the memory clock and the frequency of the memory controller is here 1:1, which means that the memory and the controller work at the same frequency of 3,000 MHz. The ratio of the Infinity Fabric Clock, which determines how fast the individual cores communicate with each other, is still 1:1 with DDR5-6000. This ratio is ideal for e.g. to enable sharp latencies.

Intel relies on a 2:1 divider for Alder Lake and DDR5, also known as Gear 2. At higher clock frequencies, it is even necessary to switch to Gear 4 or 4:1. According to Wccftech, the divider also changes to a 2:1 ratio for Ryzen 7000 processors beyond DDR5-6000. The DDR5-6400 results are poor and not recommended if you are looking for even higher gaming performance.

Interestingly, motherboards with an X670E/X670 I/O hub, although designed for overclocking, are said not to deliver the best results when overclocking the main memory. This advantage supposedly goes to the B650E, for example, on a Gigabyte motherboard with only two memory slots. In addition, the colleagues suspect that the first AGESA versions still have childhood diseases on board, especially considering that AMD is paving the way for DDR5 memory.

Ryzen 7000: More options for RAM tuning according to “1usmus”

Yuri “1usmus” Bubliy, known among other things for “DRAM Calculator for Ryzen”, takes a similar line. He confirms that up to 3,000 MHz as Infinity Fabric Clock (FCLK) is possible with Ryzen 7000. Thus, according to the overclocking experts, DDR5-6000 would also be possible with a divider of 1:1:1. In this context, “1usmus” also reveals some other (DRAM) overclocking features. Below are:

  • Active memory timing function with memory target speed setting.
  • Max IF frequency – 3000MHz
  • LCLK Frequency control
  • VDDIO Voltage control: DIMM VDD and DIMM VDDQ
  • VPP voltage control
  • UCLK MODE – no changes
  • PBO and Curve Optimizer – no changes
  • Timings per channel: A, B, C and D.
  • Extreme Memory Profile (XMP/EXPO) operates in two modes: Low Latency and High Bandwidth.
  • Active OC tuner with 2 settings: CPU Current Limit and CPU Temperature Limit.
  • Asynchronous CPU/PCIe clock
  • CCX clock control, 4 CCX
  • host clock

It remains to be seen to what extent this information applies, especially the relationship between Infinity Fabric Clock (FCLK), Memory Controller (UCLK) and Memory Clock (MCLK). According to the latest information, the press embargo for Ryzen 7000 drops on September 13th, and the one for sale on September 15th. Before then, there should also be a product announcement on August 29. As usual, the information about the supposed release comes from a leak via partner MSI.

Source: wccftech, Yuri “1usmus” Bubliy

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