This is clearly a giant Butt Plug so that Apple Fanbois can get even more intimate with their Macs....
So you have already pre-ordered?:p
Its not, you just have a significantly higher temperature threshold with a cars cooling system. Like with the water loop, the entire loop heats up, but the parts in question don't produce nearly as much heat as an internal combustion engine.
Engines also don't circulate water continuiously. The water is trapped and captures heat, then the thermostat opens and cool water flows in, hot flows out to be coolled in the radiator until the thermostat opens again.
Thermostats generally only stay closed until the engine hits running temp then remain open for the whole trip. Its there to help the engine heat up faster.
It's moot and completely personal preference unless you have some specific need to bleed the air very quickly like for testing purposes where it makes a difference, or if you're going to do something very extreme like the 55 gallondrum thing.While water does have a very good "Specific Heat" value, it still makes very little difference unless you planned to only load your processor for a few minutes at a time.Water has a specific heat value of around 4.18 J/g-K.So if you do the math, that means for 1 liter of water it only takes about 5.8 watts to raise that water temperaute 5 degrees per hour.So 100 watts will raise the temperature of 1 liter of water 5 degrees in only 3.5minutes. So even if you added another 1 liter reservoir to your loop, your water now takes a whopping 7 minutes to raise. I have about a 1 gallon reservoir in my test system, but it's not for specific heat, it's there to instantly bleed the loop and provide room for water heaters. On that system I find that a good delta like 5 degrees usually takes around 15minutes to reach equilibrium +-, a 10 Degree delta about 30 minutes and a 15 degree delta about 45 minutes. But on any system, you've also got to account for the heat storage in the radiators metals and the reservoir ect, they all absorb heat.But in the end, I never use my system for 5 or 10 minute sittings, it's always longer than that. So unless you're planning to do the 55gallon drum, I don't see the value in adding more volume to a water cooling setup. A reservoir over a T line, yes if you want fast bleeding or an easier time getting the loop filled up, but after a few days the performance is pretty much the same and to me, it's a personal preference thing.I run T-lines typically in my system were my loops are to remain long term, and reservoirs where I'm testing and need fast bleeding performance.
I have spent a lot of time on the internet, visiting sections of it there there are lots of people who watercool their computers. I have done it to mine, twice, so I know a little about this kinda thing.Temp the water in a loop gets to depends on many factors, but 30-40c would be average from what I have seen.The whole "does the water heat up" and "does the order of my loop matter" has been covered many times. I am looking for a thread where this was discussed in detail, physiks will blow your head.
Notice the wording, physiks will blow YOUR head. Not mine, YOUR head.