All this sounds like voodoo.
How can a magnetic field have a (semi?) permanent effect on water molecules!?
Well; no ones sure whatTF magnetism is just for a start and one must not forget that water molecules are polar with the O being more negative and the 2 Hs more positive, so will be affected, at least while in a magnetic field.
So what generally happens is scientists test, measure and quantify the effects of things on other things and these are the effects of interest to me/us that have been found for water:
- "enhance the conductivity"
- "decrease the surface tension"
- "evaporation amount of water increase 38.98%" (for evap/bong cooling)
- "smaller friction coefficient"
Amongst other effects. NB all the linked refs.
Effect of magnetic field on the physical properties of water - ScienceDirect
The effect of a static magnetic field on the hydrogen bonding in water using frictional experiments - ScienceDirect
NB: You have to READ the studies to get optimal field strength, orientation etc.
Whether these effects a large enough to be measurable and make a difference in water cooled computers is unknown at this point, but worth experimenting with IMHO.
(for race car cooling..?)
There are various Water Line Magnets for sale that one could try. (strong enough??)
I don't think we want to entice moving electrons (in a CPU, RAM, MB) to go off in a direction they're no supposed to!
Fortunately magnetic fields can be contained within steel containers.
ie: Putting your super magnets inside a thick enough steel box, with 2 holes for pipe entry/exit should avoid the above issue.
This is 'Out There!' for sure!
But if you want any and every edge in your overclocking hobby...