How does my loop order look?

[stlwrx]

Completed my first custom loop couple weeks ago and just want to make sure my loop is OK. I had to mount the res on the opposite side of the case because i dint have a fan mount for the res and the lian li O11 dynamic has no mount holes. Temps at idle for cpu are 25-28C and GPU 24-27C. During Prime95 smallFFT CPU temps are between 75-80C and during long gaming sessions GPU reaches 50C which i think is kind of high. Can the inlet and outlet be on the same side for the GPU or is that causing flow issues?

 

https://imgur.com/a/f8KudcD

 

Specs:

i9-9900k (oc'd to 5.0Ghz all cores 1.295 vcore

RTX 2080 (+65 core +1000 memory)

 

 

[stlwrx]

RES > PUMP > RAD > GPU > CPU > RAD > RES <

 

 

[orbitalbuzzsaw]

Loop order doesn't matter.

[Mick Naughty]

Seems fine. As long as you’re happy with it. 

 

I tend to just do mine by minimizing waste  or to get a certain look I want. 

Wouldnt think too far into it. 

[Daniel644]

if you are concerned with CPU temps you could dial back the OC a bit, like drop it to 4.9 and see how low you can take the voltage then, I know on my 6700k there was a step between 4.5 and 4.6 that required a SIGNIFICANT increase in voltage, running at 4.5 vs 4.6 allowed enough reduction in voltage that I dropped 10c off my stress test temps.

[caliusoptimus]

On 1/16/2019 at 2:06 PM, OrbitalBuzzsaw said:

Loop order doesn't matter.

Yes. It does.

 

With high flow rates small difference. With low flow rates it makes a massive difference in CPU/GPU temps.

 

@OP

 

Since your GPU is so much cooler than your CPU you might want to to feed the CPU the coolest part of the loop, then the GPU after like:

 

res > pump > cpu > gpu > rad > rad

or

res > pump > rad > rad > cpu > gpu

or

res > pump > cpu > rad > gpu > rad

 

May help very little, may help a lot. Depends on how much flow your pump is providing.

[keskparane]

I think you should have the first rad after the CPU GPU as an exhaust rad (yours is in the diagram) because then the hottest air is blown directly out the case. Otherwise you're passing the warm air through the next rad which kinda defeats the purpose.

[Daniel644]

On 1/19/2019 at 12:04 PM, caliusoptimus said:

Yes. It does.

 

With high flow rates small difference. With low flow rates it makes a massive difference in CPU/GPU temps.

 

@OP

 

Since your GPU is so much cooler than your CPU you might want to to feed the CPU the coolest part of the loop, then the GPU after like:

 

res > pump > cpu > gpu > rad > rad

or

res > pump > rad > rad > cpu > gpu

or

res > pump > cpu > rad > gpu > rad

 

May help very little, may help a lot. Depends on how much flow your pump is providing.

eventually the water temp reaches equilibrium, how long that takes depends on the amount of cooling capacity you have, once you reach that point it has been proven time and time again by multiple MAJOR youtubers that loop order makes no difference.

 

see example #1

 

 

[Mick Naughty]

I would listen to someone like singularity computers before jay. One actually knows what he’s doing. The other just has a large following. 

[GeoSquigg]

On 1/19/2019 at 12:04 PM, caliusoptimus said:

Yes. It does.

 

With high flow rates small difference. With low flow rates it makes a massive difference in CPU/GPU temps.

 

@OP

 

Since your GPU is so much cooler than your CPU you might want to to feed the CPU the coolest part of the loop, then the GPU after like:

 

res > pump > cpu > gpu > rad > rad

or

res > pump > rad > rad > cpu > gpu

or

res > pump > cpu > rad > gpu > rad

 

May help very little, may help a lot. Depends on how much flow your pump is providing.

It doesn't matter, many have tested and shown temps are the same or within 1-2C .. within margin of error.

 

For OP:

IMO the run from the reservoir to the pump is going to be hard to make work .. as far as aesthetics go

[caliusoptimus]

17 hours ago, Daniel644 said:

eventually the water temp reaches equilibrium, how long that takes depends on the amount of cooling capacity you have, once you reach that point it has been proven time and time again by multiple MAJOR youtubers that loop order makes no difference.

 

Jay almost got to me after watching that video. Then I came back to reality and remembered that I am an engineer, not a parrot, and that basic thermodynamics says:

 

If you preheat the water with your GPU, then feed it to your CPU, the CPU is going to run at a higher temp (than the other way around) regardless of overall equilibrium.

[caliusoptimus]

Also, FTR, wasn't saying that loop order changes the cooling capacity of the system.

 

My 1080ti runs around 60c fully overclocked with radiator cooling. CPU's however can easily hit 100c before you reach a respectable overclock. Choosing the correct loop order, and not preheating the water to your CPU can knock off 5-10c from your CPU temps. I have seen this in my own pc, the difference was night and day.

 

Nowadays I run a chiller around 12c. With the CPU first in the loop I am attaining 5ghz (4.7avx) on a 7820x (maxes at 75c) and the GPU doesn't pass 55c under full load for both. With the opposite loop order the GPU runs 50c and the CPU gains 5-10c.