No it's not the usual GPU vs CPU.  I know that's really a non issue.  I was watching LTT's latest video cause I wanted to see the new Corsair hydro X stuff in a build and he did a loop order thing that really confused me.  He went res > cpu > rad > gpu > res.  I thought you were always supposed to go from a rad back to the res so the pump had cool water both for it and to send out into the system again.  Does that really not matter?  In my own loop which is res > GPU > CPU > rad > res the side coming out of the CPU can get much warmer than the side coming out of the rad, though I guess if I had the rad in the middle it would probably even out.  Anyway I guess I'm just curious if it's ok to go from a component putting out heat back to the res/pump or if you're supposed to go through a rad first.

NO - Is the general rule .... if you run the loop long enough it does Not Matter ...
 
1) short sprint - chasing records the loop is not up to temp - order may make a bigger impact
 
2) The heat picked-up from one device can make the coolant warmer as it goes to the next device 
 
So, because the GPU is more sensitive to performance drop - based on Temp - I like to cool them before the CPU adds its thermal load to the coolant
 
Mine goes: Reservoir, pump, Rad1, GPUs, CPU, Rad2
 
If my CPU runs 5-10 C warmer after the GPUs - it does Not impact performance of the system

Cool GTX
NO - Is the general rule .... if you run the loop long enough it does Not Matter ...
 
1) short sprint - chasing records the loop is not up to temp - order may make a bigger impact
 
2) The heat picked-up from one device can make the coolant warmer as it goes to the next device 
 
So, because the GPU is more sensitive to performance drop - based on Temp - I like to cool them before the CPU adds its thermal load to the coolant
 
Mine goes: Reservoir, pump, Rad1, GPUs, CPU, Rad2
 
If my CPU runs 5-10 C warmer after the GPUs - it does Not impact performance of the system

Have you validated any of this? 

bp7178

Cool GTX
NO - Is the general rule .... if you run the loop long enough it does Not Matter ...
 
1) short sprint - chasing records the loop is not up to temp - order may make a bigger impact
 
2) The heat picked-up from one device can make the coolant warmer as it goes to the next device 
 
So, because the GPU is more sensitive to performance drop - based on Temp - I like to cool them before the CPU adds its thermal load to the coolant
 
Mine goes: Reservoir, pump, Rad1, GPUs, CPU, Rad2
 
If my CPU runs 5-10 C warmer after the GPUs - it does Not impact performance of the system

Have you validated any of this? 

@bp7178,       RE: Validation Response


I have not Run my IQ, OQ & PQ .... still waiting for Document Control to release the management approved / signed documents & then the opening in the production schedule to execute said validation
 
The engineering experiments have persisted though this delay & the results of increased PPD look exceptionally promising

I've run more than a few tests, On My Rigs [see signature for links to 3 of them]

Why do you ask ?



 
When OC GPUs as small as 5C - 10 C increase in temps can make a difference in Max MHz ---> because of Nvidia Boost step-downs
 
My CPUs even when benching, are never near their Max temps - So for me, in My Rigs --> they do not need the coolest coolant
 
I've Manage Over 3 Billion Points since 01 March 2019 - Folding on my GPUs  [this screen capture was 4 days ago - Now @ 3,056,974,212]
 
(9,651,733,584 since starting Folding at Home ~38 Months ago)   https://www.evga.com/folding/ (for current Points)
 

 
 

I do Res>pump>rad>cpu>rad>gpu>rad>gpu>rad>gpu>rad>res.  I need more radiators to mount fans on so I can see more pretty flashing fan lights.