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Question about Loop order.

post #1 of 9
Thread Starter 
Ok i have been preparing a watercooled setup and have been reading some threads on here and noticed that people seem to use:

Pump->Rad-> cooling blocks ->reservoir

but the way i had thought it out in my head was:

Pump-> cooling blocks-> Rad-> reservoir

it just seemed more logical to me the way i thought of it is all i guess. So is there a reason people don't do it that way round?
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post #2 of 9
Quote:
Originally Posted by Xye View Post
Ok i have been preparing a watercooled setup and have been reading some threads on here and noticed that people seem to use:

Pump->Rad-> cooling blocks ->reservoir

but the way i had thought it out in my head was:

Pump-> cooling blocks-> Rad-> reservoir

it just seemed more logical to me the way i thought of it is all i guess. So is there a reason people don't do it that way round?
The main reason is that you want the cooling blocks to get the coolest possible water. The pump dumps some heat into the loop so if you do it that way, you're not getting the coolest possible water to the CPU and other blocks. If you do it the way most suggest, the Rad comes right b4 the blocks and the coolest possible water comes out of the Rad.
post #3 of 9
The first loop you mentioned would be best. If you used the second one, you'd have the coldest water being fed to the Res, where it'll just sit, heating up. You want the coldest water to hit the blocks first, so the res almost always comes right before the blocks.

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post #4 of 9
Thread Starter 
Quote:
Originally Posted by Havegooda View Post
The first loop you mentioned would be best. If you used the second one, you'd have the coldest water being fed to the Res, where it'll just sit, heating up. You want the coldest water to hit the blocks first, so the res almost always comes right before the blocks.

~Gooda~
Ah thanks i see what you mean (i assume you mean the rad ) thanks both of you +rep
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post #5 of 9
Regardless of how you order the loop, the pump is dumping heat and the rad is removing heat into/from rapidly moving water in a closed loop. The water doesn't sit in the res. If it did, then there's no flow.

In absolute terms, the water just leaving the rad is the coolest - but the temp difference from the water entering the res (presumably the warmest) is insignificant in most cases. Order your loop in the simplest path possible that minimizes tight bends and the amount of tuning used.
Edited by TonyL222 - 5/17/08 at 3:56pm
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post #6 of 9
Quote:
Originally Posted by Xye View Post
Ah thanks i see what you mean (i assume you mean the rad ) thanks both of you +rep
Yea, sorry about that. I meant the rad

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post #7 of 9
...Cold water>pump>block>rad>pump as cold water.
post #8 of 9
You'd still have the heat from the pump going into the block. If you put the pump before the rad, it'll take that heat away before it goes to the blocks.

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post #9 of 9
I always run my loop res-pump-rad-cpu-any other blocks...The only time i wouldn't is if it takes a lot of extra tubing to get that config, it would defeat the purpose then....
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