Grasping Infinity fabric frequency and dividers
Grasping Infinity fabric frequency and dividers
So finally I've made my rig consisting of Ryzen 5 3500, Rtx 2060, B450 steel legend and Adata xpg gammix D30 3200 mhz16gb. Getting into the bios I can see that there is an memory overclock section with XMP profile. I understand that XMP profile can let me achieve the targeted 3200 mhz (currently set to 2666 mhz). But there is a option called 'Infinity fabric frequency and dividers', which can manually be set upto 3000 mhz. Does anyone have any idea about what it is? What should I set it to when I set the dram frequency to 3200 mhz? I don't want to oc the cpu right now. Considering this, do I need to change any more profile?
Thanks in advance.
The main connections are A2 and B2, while A1 and B1 serve as secondary options. You'd rely on these specifically when using four RAM sticks, which due to the infinite fabric constraints, will operate at slower speeds compared to the xmp rating of two sticks.
A2 offers the quickest path and is the primary port for AMD, designed for a single high-speed stick. It resembles the USB ports found on the back of the computer—featuring some fast 3.2 red slots, standard 3.0 blue slots, and black USB 2.0 slots. For external storage, choose the red slots instead of black to avoid delays during uploads or downloads.
High-speed RAM requires the 'red' A2-B2 connections. A1-B1 would be black slots, which are not recommended.
I believe that's for manually setting fclock if using ram faster than the 3466 cap on 2000 series cpus, allowing infinity fabric to be set under that cap to retain the 1:1 ratio.
View: https://www.reddit.com/r/Amd/comments/cc...s_on_zen2/
Information very helpful. So, with DDR4-3600 (like 3200 MHz) the 'FCLK' adjusts itself automatically to 1600 MHz, right? Would it be okay if I just set it directly to 1600 MHz instead of changing anything else?
Even after setting the XMP profile to 3200 mhz and FCLK to both auto and 1600 mhz, the RAM continues to run at 1330 mhz. I adjusted the voltage to 1.4 volts from 1.35 but the issue persists. No changes were saved. Assistance needed?