increased overclock stability would indicate that the chip is being cooled better in the areas it needs it, yeah? If it gets cooler in the diode area and makes no difference to the clocking of the chip, im going to go out on a limb and suggest that the slightly lower temperature will have no effect on the chips lifespan (if thats what you're after)...
If you're just talking about general cooling efficiency - then for what? so you can say that your cpus diode is colder, even though theres no tangible benefits for it being so?
Watercooling is generally for 3 reasons
Overclocking (obviously chip stability comes into this)
Silence (again, chip stability - means you can have it slightly warmer and be slightly quieter)
Bling (completely irrelevant to anything else)
cooling efficiency comes directly under how far it will overclock... If its more stable (ie will clock higher) with a different waterblock, even though it shows the same temp, id call it more efficient... what is efficiency?
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1. The ratio of the effective or useful output to the total input in any system.
Id underline useful here, but hey, you get the point
