1080 sli cooking problems

[Camden haske]

So I recently upgraded to sli for 1080s and in my water cooling loop I’m having problems keeping the temp below 68 at full load after a wile I have a 360 and a 120 rad, any ideas on the problem? I’ve tryed everything I know so let me know if you have any ideas 

[iRileyx]

What are your fans running at, and have you tried turning up your fan speeds?

[Valkyrie Lenneth]

u might need to change ur loop order

 

example

 

120rad > cpu > 360rad > gpus

 

or w/e  ^  just an example

 

changing loop orders has solved mysterious temp issues for alot of ppl i helped

 

if u got 2 rads its best to have 1 dedicated for cpu and one for gpus ( coz the water will heat up after the cpu, thus heating even more after hitting gpus ) by havin a rad dedicated for gpu, that heatup shouldnt happen as badly )

[djw191]

Just now, Valkyrie Lenneth said:

u might need to change ur loop order

 

example

 

120rad > cpu > 360rad > gpus

 

or w/e  ^  just an example

Loop order doesn't really matter:

 

 

[Valkyrie Lenneth]

Just now, djw191 said:

Loop order doesn't really matter:

 

 

it does matter if ur water is getting actually warm, its the same as ppl sayin delidding doesnt matter,  it doesnt matter if u put a intel stock cooler on

 

ive actually seen ppl having high water temps , put a rad betwen  / changed order and suddenly temps good

[xSimone]

If you want the radiator to change the cooling efficiency in the loop, then the only thing you can do is add another radiator. Changing its position in the loop logically as I see it will do nothing, except slightly impact the first cooling destination. 

Please correct however if I am wrong. :f

[Dschijn]

No, loop order doesn't matter.

[W-L]

29 minutes ago, Camden haske said:

So I recently upgraded to sli for 1080s and in my water cooling loop I’m having problems keeping the temp below 68 at full load after a wile I have a 360 and a 120 rad, any ideas on the problem? I’ve tryed everything I know so let me know if you have any ideas 

Can you take a photo of your loop we can get a better idea of the situation we are working with. 

[For Science!]

2 hours ago, Camden haske said:

So I recently upgraded to sli for 1080s and in my water cooling loop I’m having problems keeping the temp below 68 at full load after a wile I have a 360 and a 120 rad, any ideas on the problem? I’ve tryed everything I know so let me know if you have any ideas 

How thick are your radiators? I have also have a 1080 SLI setup and we can compare numbers if you'd like. I have a 360 mm + 240 mm Hardware Labs GTS setup with a D5 pump. After 2 hours of Realbench these are my numbers:

 

7700K (4.8 GHz, 1.312 Vcore):  79 degrees on hottest core

Asus Turbo 1080 (+139 MHz Core, +405 Mhz Memory): 44 degrees

Asus Turbo 1080 (+139 MHz Core, +405 Mhz Memory: 46 degrees

Water Temperautre: 37 degrees

 

Which is a decent improvement from my previous setup prior to my annual maintenance which in a similar run had these temperatures:

 

7700K (4.8 GHz, 1.36 Vcore):  91 degrees on hottest core

Asus Turbo 1080 (+139 MHz Core, +405 Mhz Memory): 57 degrees

Asus Turbo 1080 (+139 MHz Core, +405 Mhz Memory: 56 degrees

Water Temperautre: 44 degrees

 

I changed a few things including but not limited to:

 

- Adjust my Vcore to suit the overclock better

- Upgrading my thermal paste to Thermal Grizzly Kryonaut from MX-4 (GPU) & AS5 (CPU)

- Setting all radiator fans to exhaust since I work in a relatively compact Meshify C

- Having an unobstructed intake fan (Which I didn't have before)

- Putting my fans in push instead of pull (Noctua claims minor performance boost for their fans)

 

[Mick Naughty]

Need more detail. Prolly airflow and rads that could be the issue. Form what ive had anyway.

 

Pump speed depending on routing. I know mine stay pretty cool but I have a 280 in place to where you have a 120. 

[Camden haske]

I currently have it set up so it goes res pump 2 gpus 120 cpu then 360 and my fans are running at 1200rpm 

[W-L]

4 minutes ago, Camden haske said:

I currently have it set up so it goes res pump 2 gpus 120 cpu then 360 and my fans are running at 1200rpm 

The order as mentioned does matter as the difference is marginal, what watercooling components are you using. Also we can determine better with a photo of the loop. 

[Camden haske]

On 5/16/2018 at 6:28 PM, W-L said:

Can you take a photo of your loop we can get a better idea of the situation we are working with. 

 

[Camden haske]

I do have a fan on the rear as well it just mounted on the back all fans from and rear pull in and the tops are the exhaust 

[W-L]

1 minute ago, Camden haske said:

I do have a fan on the rear as well it just mounted on the back all fans from and rear pull in and the tops are the exhaust 

Overall I don't see anything that jumps out that warrants concern, what's your pump your using in the loop and the settings for it? 

[Camden haske]

It’s a ek d5 and I have it set to 12v all the time, that’s what I can’t figure out it all seams to be right but maybe just not enough rads ? They are slim rads but it seams like it should still be enough and the cpu runs at 75 c at 5ghz so I don’t know the the gpus keep getting so hot. Maybe the flow regulator in the gpu blocks ? 

[W-L]

1 minute ago, Camden haske said:

It’s a ek d5 and I have it set to 12v all the time, that’s what I can’t figure out it all seams to be right but maybe just not enough rads ? They are slim rads but it seams like it should still be enough and the cpu runs at 75 c at 5ghz so I don’t know the the gpus keep getting so hot. Maybe the flow regulator in the gpu blocks ? 

For the D5 what range do you have it set on though, if it's a PWM unit try varying the RPM range to see if it improves since you do have a fair number of blocks and angled fittings which cause quite a bit of restriction. 

[Camden haske]

Let me give that a try and I’ll get back with yky thanks again for the help !

[Camden haske]

18 minutes ago, W-L said:

For the D5 what range do you have it set on though, if it's a PWM unit try varying the RPM range to see if it improves since you do have a fair number of blocks and angled fittings which cause quite a bit of restriction. 

Thanks again changed the rpm and now running at much more reasonable 45 and 55c