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Hi everyone, I found the cause of system-wide desync. It's due to RAM instability!!! My system is a Ryzen 7800x3D, 6000 MHz, CL36 Expo. Why is this severe desync occurring? The problem is that with Expo enabled, your processor can't operate at a 1:1 ratio, and you get unstability at the macro level. And why is it necessary to use Jedec on the AM5? For DDR4, you need a stable 1:1:1 ratio, and not every processor supports XMP at 1:1:1.

Just so you know, I'm using the official Windows 11 25h2 ISO and installed the drivers via the Gigabyte utility.
I don't use any tweaks. I don't change power settings, timers, or anything.
I connect the mouse to the USB port connected to the processor, and the keyboard to the USB port directly connected to the chipset.

mobo - b650 aorus

naporitan wrote: ↑

27 Jan 2026, 00:24

And why is it necessary to use Jedec on the AM5?

Because on jedec the 1:1 ratio works stably.

naporitan wrote: ↑

27 Jan 2026, 01:54

Because on jedec the 1:1 ratio works stably.

For example, on an LGA1700 with DDR5, you'll always get severe desync because the RAM runs in Gear2 mode! And you won't even be able to get Gear1 on a Jedec 4800! Therefore, you need to use DDR4 and make it stable in Gear1 mode!

Now you know the true cause of system desynchronization!!! And I hope you'll share your experience

The problem is at the macro level and therefore you will not see errors in stress tests

naporitan wrote: ↑

27 Jan 2026, 02:00

For example, on an LGA1700 with DDR5, you'll always get severe desync because the RAM runs in Gear2 mode! And you won't even be able to get Gear1 on a Jedec 4800! Therefore, you need to use DDR4 and make it stable in Gear1 mode!

3600cl14-14-14-34 Real 1N, still out of synch.

Slender wrote: ↑

27 Jan 2026, 03:38

3600cl14-14-14-34 Real 1N, still out of synch.

try using jedec.

i7 14700k

Снимок экрана 2026-01-27 114957.png (34.16 KiB) Viewed 5472 times

naporitan wrote: ↑

27 Jan 2026, 03:51

Slender wrote: ↑

27 Jan 2026, 03:38

3600cl14-14-14-34 Real 1N, still out of synch.

try using jedec.

i7 14700k
Снимок экрана 2026-01-27 114957.png

default with stock voltage feels way better about desync, but still same issue.
it better, as u write before, set xmp frequency, voltage, but stay on auto timmings.

I have Intel 12700k pcore 5.2 ecore standart , ddr4 4000 ( i dont remeber now timings ) but as far i remeber i set manual to gear 1 and its works and i didnt Has problem with desync ( or im blind)