What are the CAD bus timing details?
What are the CAD bus timing details?
I'm working with a gigabyte ax-370 motherboard paired with a ryzen 1700x processor and g.skill RAM. I'm attempting to overclock the RAM, which is currently running at 2133mhz but rated for 3200mhz. While using the dram calculator, I'm encountering missing details like "cad bus timings" and "soc voltage." The CPU voltage I've set is already changed after replacing it, so I'm not sure about the exact soc voltage. I ended up locating the cldo vddg voltage in peripherals/AMD CBS/nbio common options, but it's still challenging to proceed without those settings.
Memory compatibility has seen significant progress with the latest AGESA, though the first-gen Ryzen memory controller remains subpar. Achieving 3200 MHz is challenging and still requires custom timing adjustments, making XMP settings less dependable at best.
Hey there,
While Dram Calc can be helpful, the simplest way to adjust the speed of your DIMMS is by checking your BIOS and searching for XMP or A-XMP settings. Just enable that option, and it should detect the right RAM speed. But keep in mind they might not exceed 2933mhz, which is typically the upper limit for the IMC in first-gen Ryzen chips.
Memory compatibility has seen significant progress with the latest AGESA, though the first-gen Ryzen memory controller remains subpar. Achieving 3200 MHz is still challenging and requires custom timing adjustments, making XMP settings less dependable at best.
@brandonbsmith02
Check advanced timings for CadBus configurations. However, I doubt they will provide real improvement if stability isn't consistent. I mainly tweak the big 4, Tcas, Trcd, Trp, Tras plus Trfc. For higher clock speeds, focus on procODT and RTT parameters. Above all, ensure a sufficiently high Vdimm value. Don’t hesitate to use 1.45V, but for continuous use on 24/7 operation, stick to 1.40V unless using an 8GB Samsung B-bie. That usually ensures stability—otherwise lower clocks are better. Fine-tuning the rest of the settings is typically reserved for pushing toward the absolute minimum latency.
EDIT: Also, consider setting Command Rate to 1t and enabling Gear Down mode as needed to achieve the desired result.