MSI MEG Z690 UNIFY Manuel D'utilisation page 42

JSLOW1: Slow Mode Booting Jumper
This jumper is used for LN2 cooling solution, that provides the extreme overclocking
conditions, to boot at a stable processor frequency and to prevent the system from
crashing.
JLN1~2: Low Temperature Booting Jumper
This jumper is used for liquid nitrogen cooling system to boot at an extreme low
temperature. Try to set it Enabled to increase the boot success rate.
⚠
Important
∙ Users will try extreme low temperature overclocking at their own risks. The
overclocking results will vary according to the CPU version.
Please don't set to Enabled when power-off or the system will be un-bootable.
∙
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Overview of Components
Normal
(Default) (Please enable this jumper
during BIOS POST.)
Normal
(Please enable this jumper
(Default)
Enabled
Enabled
during BIOS POST.)