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Y connectors

catkicker

catkicker

Limp Gawd
Joined
Mar 30, 2005
Messages
388
Another question. In all the pictures i have looked at of watercooled systems. the plumbing is all inline the water moves through the cpu then the gpu, or cpu, chipset, gpu. Is there a drawback to useing a Y connector to run seperate lines to the inlets on the blocks?
 
yes, there is.

typically the CPU block has more resistance than the other blocks. if you have a Y fitting, to run things in parallel, then less water will flow through the more restrictive CPU block, and more will flow through the less restrictive GPU/chipset block.

since you want lots of flow through the CPU block, using a Y is therefore a bad idea, as a general rule.

lots more detail to it, but i think that's the key point covered.
 
Thank's for the info. Cant wait to get started. chipset block and active MEM. cooler came today.
:D
 
what would be the alternate solution then? 2x pumps w/ 2x radiators?
 
yeah, that or deliberately adding some impingement to the GPU loop. (like a partially closed valve in-line with the block)

lots of people have tried it, but i have not heard any real success stories.

a single loop, or two seperate loops are the tested and true methods.
 
to elaborate just a bit: waterblocks typically opperate under conditions where there is a relatively large volume of coolant flow, and a relatively small delta T from inlet to outlet.

therefore, since the coolant coming out of the GPU waterblock is only SLIGHTLY warmer than the water going into the GPU waterblock, there is only a SLIGHT gain to feeding the CPU block fresh water from the rad, as compared to feeding it water from the GPU.
 
However, there are certain instances where splitting lines does work well. If you decide to use say .375 line from rad to CPU and all your other coolers are say .250 then splitting makes sense because if you don't you get a major restriction and reduced flow. Example is the new Koolance EXOS II and their PRO series cases.
 
Top Nurse said:
However, there are certain instances where splitting lines does work well. If you decide to use say .375 line from rad to CPU and all your other coolers are say .250 then splitting makes sense because if you don't you get a major restriction and reduced flow. Example is the new Koolance EXOS II and their PRO series cases.
Click to expand...
valid point.

fore is think about using a Y on his entirely 1/2" ID DD system, which is rather a different kettle of fish, but hey there is the success story that i have not heard about.
 
i am running Y's in my water cooling loop - only because i am running 2 heater cores in parallel and the rest of the circuit is in series.

pump1>gpu1>cpu>gpu2>pump2> Y >heatercore1 / heatercore2 > Y > pump1

cpu idle 29c load 44c
gpu's idle 29~30c load 38~40c
 
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