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post #11 of 16
Thread Starter 
Since I have never watercooled before, please explain "bleeding"
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post #12 of 16
Quote:
Originally Posted by LivingChampion View Post
Since I have never watercooled before, please explain "bleeding"
Removing all the air from the components.

Basically you need to fill your res, run the pump a little, top up the res, run the pump etc etc until the loop is full. Then you need to tilt the case round whilst running the pump to get all the remaining air pockets out. Starting and stopping the pump also helps.

Rads are generally the hardest things to bleed as they are essentially a U shaped channel. If the ports are at the bottom then air can get trapped in them and is difficult to get out. Hence either mounting with ports at the top or lying the rad down is required to "bleed", or remove all the air.

This is a (really bad) diagram of a rad mounted with ports at the bottom:


Air will get trapped in the top chamber, where the orange arrow is.
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post #13 of 16
I have a bit of an issue with bleeding my radiator even with it being horizontal. It is, however, the highest point of my loop, which doesn't help things at all. Still, don't fret too much as the air will make its way out, especially with a little prodding.
post #14 of 16
Thread Starter 
Quote:
Originally Posted by GingerJohn View Post
Removing all the air from the components.

Basically you need to fill your res, run the pump a little, top up the res, run the pump etc etc until the loop is full. Then you need to tilt the case round whilst running the pump to get all the remaining air pockets out. Starting and stopping the pump also helps.

Rads are generally the hardest things to bleed as they are essentially a U shaped channel. If the ports are at the bottom then air can get trapped in them and is difficult to get out. Hence either mounting with ports at the top or lying the rad down is required to "bleed", or remove all the air.

This is a (really bad) diagram of a rad mounted with ports at the bottom:

[PICTURE]

Air will get trapped in the top chamber, where the orange arrow is.
Thanks. If only some air is present within a loop, how bad will the cooling be compared to a loop with perfect air flow without any air bubbles?
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post #15 of 16
Quote:
Originally Posted by LivingChampion View Post
If only some air is present within a loop, how bad will the cooling be compared to a loop with perfect air flow without any air bubbles?
From pretty much the same to poor, it really depends on how much air and where it is.

If it is just a few small bubbles kicking around then it is not going to make a noticeable difference, however if there is enough air to reduce the size of a flow channel (for example in the top of the rad) then it will screw things up.

To be honest you will know when the loop is fully bled. There will be no gurgling sound with the pump on, no sloshing sounds as you tilt the case (other than from the res) and the water level in the res will not change dramatically as you turn the pump on and off (from air pockets compressing).
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post #16 of 16
Thread Starter 
Hm, How does the RX240 compare to the RX360 in cooling when used with two cards in SLI or in a one card one CPU set up? I'm going to buy a RS240 regardless in the future to cool my CPU, so if temps won't be a difference then I could save 20 bucks. But even 5C cooler would bring me back towards waiting on the RX360. (RX360 is Sold out ATM)
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