Hey Tom.
Good OC result but the goal is not to freeze complte MB but only to cool CPU and other chips.
In my oppinion this should be done only at one way. That way is CC-way. CC is Cold Current. Simplu imagine than current flow through any resistance not causing heating and over heating but cooling an dfreezing. Interesting is aspect where - temperature depends of resistance ammount of any active component. As resistance is lower cooling is better. This is old Tesla technology, improved and tested by Floyd Sparky Sweet in his VTA device. VTA is Vacuum Tube Amplifier, AboveUnity generator with negative power output of -5Watts. - means out of generator is a COLD CURRENT not HOT CURRENT 99,99999% used today because ignorance of PMSS - PlanetaryMainStreamScience.
Knowing modern HEMT transistor newest generation and used TCXT phase controlled oscillators entrance to the THz range is matter of months. Now using Cold Current HEMTs boosting virtual digital revolution we be possible to the ultimate level. Just imagine Your pc configuration for example 32 cores, each at fixed freq. 156,666 THz with 512 Peta bytes of DDR8 memory at same frequency.
Remember short circuit with HOT CURRENT would burn your fingers, with COLD CURRENT would momentary freeze your fingers.
I would disclose whole CC trick ---> New spinotronic of highly mobility electrons. Swap their particular spins and phased them all in mighty coherent global spin wave and volla - COLD CURRENT would flow and boost your computer to the final frontier.
Regards
DonRyzen