F5F Stay Refreshed Hardware Desktop Question UCLK DIV1 MODE & other options?

Question UCLK DIV1 MODE & other options?

Question UCLK DIV1 MODE & other options?

A
achump
Junior Member
39
01-06-2026, 12:49 AM
#1
I need assistance with configuring this correctly.
CPU: Ryzen 9800X3D
RAM: G.Skill Trident Z5 Neo EXPO RGB 32GB (2x16GB) DDR5 PC5-48000C30 6000MHz Dual Channel Kit
I have an expo 1 setup running at 6000mhz but am uncertain about setting UCLK=MCLK 1:1 properly.
I notice similar options in AI Tweaker and AMD overclocking sections, which seems confusing since they appear in two places. There are also memory context restore settings in two locations and power down enabled in three.
Currently, memory context restore and power down are disabled everywhere, as I believe this improves stability—even though it may cause a slightly longer boot time due to memory retraining. A boot time of about one minute isn’t a major concern for me. It’s important to have both settings active or inactive together based on your MCR settings, or else you might encounter bluescreens.
I have UCLK div1 mode set to auto in both places, and I’m assuming the system is already in 1:1 mode. However, I’ve seen discussions suggesting it should be explicitly enabled with a specific setting, which makes it hard to decide given the outdated content and misinformation available.
Images below are for reference; thanks for checking.
A
achump
01-06-2026, 12:49 AM #1

I need assistance with configuring this correctly.
CPU: Ryzen 9800X3D
RAM: G.Skill Trident Z5 Neo EXPO RGB 32GB (2x16GB) DDR5 PC5-48000C30 6000MHz Dual Channel Kit
I have an expo 1 setup running at 6000mhz but am uncertain about setting UCLK=MCLK 1:1 properly.
I notice similar options in AI Tweaker and AMD overclocking sections, which seems confusing since they appear in two places. There are also memory context restore settings in two locations and power down enabled in three.
Currently, memory context restore and power down are disabled everywhere, as I believe this improves stability—even though it may cause a slightly longer boot time due to memory retraining. A boot time of about one minute isn’t a major concern for me. It’s important to have both settings active or inactive together based on your MCR settings, or else you might encounter bluescreens.
I have UCLK div1 mode set to auto in both places, and I’m assuming the system is already in 1:1 mode. However, I’ve seen discussions suggesting it should be explicitly enabled with a specific setting, which makes it hard to decide given the outdated content and misinformation available.
Images below are for reference; thanks for checking.

H
Heroteddy
Member
203
01-06-2026, 12:49 AM
#2
Based on the Zen timings screenshot, you're already connected 1:1 with UCLK/MCLK. Keep Memory Context Restore enabled automatically. This setup works on your 9900X and the Windows login screen takes roughly 13 seconds to load.
H
Heroteddy
01-06-2026, 12:49 AM #2

Based on the Zen timings screenshot, you're already connected 1:1 with UCLK/MCLK. Keep Memory Context Restore enabled automatically. This setup works on your 9900X and the Windows login screen takes roughly 13 seconds to load.