Cooling simple water cooling question

i have seen loops were the water goes like this:

1)deposit->rad->pump->block->deposit

2)deposit->pump->block->rad->deposit

were in 2) you are dissipating heat from the cpu to the rad and cool water goes to the deposit were it will be cooled even further.

and in 1) the warm water goes directly to the deposit, which is usualy made of acrilic or some kind of plastic, and plastic usualy does not like hot water and goes crunchy.

i think 2) is the more logic one, why do most loops i see, if not all, use 1)?

 

I can't think of any loop that is like 1) to be honest, because it violates the most important principle of loop construction: the reservoir (not "deposit", although literally translated it is an accurate description) should be the last thing before return to the pump.

This is to do with pressure differentials and cavitation, not temperature. The difference in temperature of coolant entering a block and leaving it, is a few degrees at most and has no adverse effect on the reservoir.

 

the usual setup would be res->pump->rad->block, that way any heat added to the water by the pump is taken out by the rad, although there have been lots of tests to prove it really doesn't matter so long as the res is directly before the pump.

 

OWW!!!!!! did not know that, i thougt the water was at the cpu temp after it leaves the block or even 1/2 higher like entering at 30 and exiting at 45.

and you are correct i did 1) wrong: 1) reservoir->pump->rad->block->reservoir

but if the water comes out about the same temp it comes into the block then the reservoirs should not malfunction.

thanks