Anyone here watercooling 980ti's in SLI

NoobCannon

NoobCannon

NoobCannon

Soldato
Joined
13 Jun 2011
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hi all,

been playing a bit of Dirt 3 recently and have noticed that with full ultra settings and 3840x2160 DSR both my cards are hitting 60'c which seems insane, similar situation with witcher 3. Same settings and res

have also noticed that my psu fan has been going flat out since upgrading to these cards and never seemed to with my previous ocd 7970's altho I don't get any stability issues I'm guessing the 980's are just munching a lot more power

just wanted to know what sorta temps other peoples cards hit running games at 4k really to know if I need to invest in more rad. Am tempted to get another 240 for the bottom but as the case sits on thick carpet I don't think it will get any airflow unless I raise it up somehow

my setup as below.

3770k @ 4.7 1.35v
980ti 1512/2005 @ 1.274mv
1 x 360 and 1 x 240 rad 5 x gentle typhoons [3 on 360 2 on 240]
Seasonic x series 1050w gold

XzT4n6A.jpg
 
CoolHotCold said:
Is it a bay res and a separate D5 which is being fed from it.

Don't usually see a pump outlet connected directly to a rad rather than a block.
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yes bay res and separate D5. exactly the same setup as ive always ran only difference is the cards


Glanza said:
I'd parallel tube your cards, also is your pump on full speed or are you controlling it?
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got the pump on speed setting 3 I tried earlier running it on full speed [5] but made little to no difference to temps [-1'c]

wouldn't thought the way the blocks are fed would make much of a difference seen as they are even temperature wise? unless you can tell me different obviously
 
I'd say get another rad,your cpu+ gpu's are prob hitting close to 700w total heat to be dissipated at those clocks.

What rads are they?,the front looks like a an xspc ex240,whats the top one,its not visible,i assume its quite a thin one?
 
Also,your top rad fans are acting as exhaust,pushing hot air from the 240mm through the 360mm,flipping those to intakes and keeping the rear fan as the only exhaust will make a few degrees difference to your water.
 
MrMD said:
I'd say get another rad,your cpu+ gpu's are prob hitting close to 700w total heat to be dissipated at those clocks.

What rads are they?,the front looks like a an xspc ex240,whats the top one,its not visible,i assume its quite a thin one?
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bought both rads at the same time they are both ex's from what I remember ex240 and ex360.

hmm may try swapping the fans over. would give me the rear and the psu as an exhaust then.
 
NoobCannon said:
bought both rads at the same time they are both ex's from what I remember ex240 and ex360.

hmm may try swapping the fans over. would give me the rear and the psu as an exhaust then.
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Flipping the top fans should lower your temps a little.And see how that works out for you

Failing that i think replacing the the 360mm with a thicker rad could make good difference.I have oneof 240mm models they are good rads for the money,but they arnt very thick at 35cm.Your gear is heavily oc'ed so you want thicker rads to dissapate your heat properly. :)
 
thicker rads will make a small difference but not a huge one/ surface area is far more important. 60c seems quite normal especially with the custom 1281mv bios and 2 radiators, and you have the GPU's in series aswell. Mine got quite hot with the custom bios 45c at 1550mhz, somewhere around the 850w mark lol. Have since put some corsair sp120 performance pwm fans instead of my old quiet edition ones and they dont break 40c now (they run low-mid 30s with a mild +160mhz overclock). I wear headphones so i cant hear them. I just have them to come up to speed on cpu temp (while gaming).

Having larger radiators would make a huge difference. But you would need a larger case for sure. I swapped my 750D for a 900D just for radiator space. Made it far worth while.
 
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I just so happen to have a similar loop setup to you, I have a system with a 2500k @1.31 volts, 2 Titan X's in parallel which are both at @1.2v.

I'm using an EK Supremacy CPU block, EK Titan X GPU blocks, EK D5 bay res with the D5 pump on maximum setting and I am using an ST30 360 in the top (exhaust) a UT60 240 (intake) with one set of NF-F12's on each @1000 RPM. My temperatures easily shoot up into the low 60's when stressing the system and I've seen it go up to 70's on the GPU's in a long session of GTA.

It's simply not enough radiator space for what you are trying to cool, I knew this before I built my current setup anyway as I've water cooled a fair few systems now but, I'm only using this setup temporarily until I receive the rest of the parts I need for my new build.

Thicker radiators won't give too much of a difference in temps either unless you can run two sets of fans for push/pull but even then it would only be a few degrees probably. Judging from the performance I've seen from my rig I'd say you need at least a 480 radiator if you wanted GPU temps in the 50's.
 
Your 360 rad is allowing 120mm for every component (CPU+2*GPU) and your 240 rad seems plenty headroom, so I'm not convinced it's rad space that's the problem. I had a very similar set up with 980 SLI and they would max out at around 50C. 980 Ti run hotter than 980, so maybe you've got the best you can get?

If anything, switching to parallel on the GPU's will help the flow. Whether it makes a big temperature difference is another story. I ran my 980's in parallel and would always do a parallel set-up with SLI.
 
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