WC final spec check

[MikeTimbers]

Yes thats exactly what i ment regarding how much rad is needed.

Flow rate has been tested and the fan analogy is incorrect. Slower moving water will get hotter at the blocks as it'll be there longer, equally it will also spend more time in the rad giving it more time to transfer the heat to the rad. It's been well discussed on XS and tested by Gabe from swiftech

The water spends exactly the same amount of time in the blocks during a given time period no matter what speed it goes at. Cathar's analogy of the racetrack and the racing car is still valid.

Myth: Water must slow down to fully absorb heat.

Reality: In a closed loop, a given water molecule actually spends the same amount of time in the radiator, no matter how fast it is moving, as long as the water is indeed moving.

If this is a difficult concept to understand, think about a race car on a track.
If the track is one mile (5280 ft) long and the car is driving at 60mph, the car will spend about one second in a 100 ft stretch. Think of the 100 ft stretch as the radiator.

If the speed is doubled, the car only spends ½ a second in the 100 ft section, but it passes through that same section twice a minute, so it spends a total of one second in the 100 ft section per minute.

The hotter the water gets inside the block, the less efficient the heat transfer is. You actually want the water to move through the block as fast as possible to remain as cool as possible. While that sounds crazy, just think about it for a bit.

http://www.overclockers.com/water-cooling-flow-rate-and-heat-transfer/

The thread linked to from Gabe of Swiftech was specifically related to what happens to temperatures if you add additional blocks. Although it was titled as to do with flow-rates, there is not a single measurement of flow in the entire post! Swiftech used to have a water-cooling god (Bill Adams) who worked for them but it was a long time ago.