Watercooled octane render workstation TITAN+3x 780 6GB

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smicha
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During my morning coffee I just thought I'll swap be-quiet BL062 with NioseBlocker PRO PL2. I only swapped 4 of these (got 6 for myself). And...

1. Equipped with rubber noise reduction washers (for a radiator it is perfect) and rubber ring (as an exhaust fan). 4 black m3 screws with extra nuts -for 35mm m3 screws I put them just below the top part to reduce length to about 30mm. This is so cool and important because there is no need for searching for any extra screws - as in be-quiet case. Sleeved cables - detachable - with two versions 50 cm and 20 cm.

2. The look is just awesome - plain black with no extra add ons. They look so elegant.

3. Shape is different from those BL02. They are square and don't let bounced from a radiator air let go out.

4. Acoustics - At 5V inaudible (when I put my ear next to it I must admit that be quiet are nicer, but who listens fans from 1cm distance, probably me :)). I am shocked that at full speed they are quieter then be quiet fans (probably this is due 1400rpm vs 1500rm of BL062). But overall acoustics is so great.

5. Performance - 2C temperature drop (I only replaced 4 of them, not 12 or 16). Jaw dropping.

So after my long journey I find these rads as best value for the money. I also tested M12-2 and eloop series- but I liked plain look of PL2 better.

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3090, Titan, Quadro, Xeon Scalable Supermicro, 768GB RAM; Sketchup Pro, Classical Architecture.
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smicha
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Looking at todays OctaneBench statistics I just realized how beneficial water cooling is. 3x780 on water perform 10% better than 4x780. An aircooled setup has 68% power of watercooled setup. Besides I had 35C at 1320Mhz 780 today.
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3090, Titan, Quadro, Xeon Scalable Supermicro, 768GB RAM; Sketchup Pro, Classical Architecture.
Custom alloy powder coated laser cut cases, Autodesk metal-sheet 3D modelling.
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glimpse
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smicha wrote:Looking at todays OctaneBench statistics I just realized how beneficial water cooling is. 3x780 on water perform 10% better than 4x780. An aircooled setup has 68% power of watercooled setup. Besides I had 35C at 1320Mhz 780 today.
Great finding, Sebastian! =)
I was expecting that =p
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BorisGoreta
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This is one very poor 4xGTX 780 result. I don't see it anymore in the result graph:

http://render.otoy.com/octanebench/summ ... 4x+GTX+780

Maybe those were 4 cards with stock air coolers stacked close together.

My result with 4 780s on air is 387.34 so speed improvement with water cooling is 7% per card.


Individually the cards can go up to score 100 ( the speed of 980 ) but when all 4 are on something is not right, maybe too much heat or too much voltage for PSUs to handle.
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smicha
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BorisGoreta wrote:This is one very poor 4xGTX 780 result. I don't see it anymore in the result graph:

http://render.otoy.com/octanebench/summ ... 4x+GTX+780

Maybe those were 4 cards with stock air coolers stacked close together.

My result with 4 780s on air is 387.34 so speed improvement with water cooling is 7% per card.

Are your 780s close each other? Or on raiser? Are these 780s with stock fans or these are Strix that have non reference coolers?
Watercooling also gives silence and temps at load 35-45C.
3090, Titan, Quadro, Xeon Scalable Supermicro, 768GB RAM; Sketchup Pro, Classical Architecture.
Custom alloy powder coated laser cut cases, Autodesk metal-sheet 3D modelling.
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BorisGoreta
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They are in an open rig with a 4cm of air space between them. Two are STRIX and two are EVGA also with two big fans. There are no additional coolers in the rig ( only the one on the CPU ). They operate hot, STRIX at 70 and EVGA at 84 degrees.

Do watercooled cards generate the same amount of heat as air cooled ones ? One of the problems is that the room temperature is around 30 degrees because of all that heat. So in watercooled situations would that be the same ? I know the cards are much cooler but is it because watercooling transports the heat into air faster and more efficient but the heat generated to the room is the same ? Or non watercooled cards operate on much higher temperatures to start with and thus generate much more friction and heat ? What is the temperature of the radiator when touched ? Does it burn your fingers ?
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smicha
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Temperature measured at the hottest spot in the loop is 35-37C.

Yes - the room is getting warmer too, because the heat has to be dissipated somewhere. That is why I keep my computer next to a window where airflow is greater.
3090, Titan, Quadro, Xeon Scalable Supermicro, 768GB RAM; Sketchup Pro, Classical Architecture.
Custom alloy powder coated laser cut cases, Autodesk metal-sheet 3D modelling.
build-log http://render.otoy.com/forum/viewtopic.php?f=9&t=42540
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smicha
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PS. Boris,

I saw your build here http://render.otoy.com/forum/viewtopic.php?f=9&t=43795
and it is impressive. Your greater performance on air is due to the extra spacing between cards. And this is a great solution for a multi gpu setup on aircooling.
3090, Titan, Quadro, Xeon Scalable Supermicro, 768GB RAM; Sketchup Pro, Classical Architecture.
Custom alloy powder coated laser cut cases, Autodesk metal-sheet 3D modelling.
build-log http://render.otoy.com/forum/viewtopic.php?f=9&t=42540
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sadece
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Hi Smicha,
Following your posts with pleasure about the rigs. OC and WC things. Respect!
A question in my mind: OCing your gpus has any downside like short-life even while you are able to keep them under 45C at load ?
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smicha
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sadece wrote:Hi Smicha,
Following your posts with pleasure about the rigs. OC and WC things. Respect!
A question in my mind: OCing your gpus has any downside like short-life even while you are able to keep them under 45C at load ?
If so not that much - actually keeping them at max 45C expands their longevity - all OC is done at stock voltage - 1.1-1.2V on GPU.
3090, Titan, Quadro, Xeon Scalable Supermicro, 768GB RAM; Sketchup Pro, Classical Architecture.
Custom alloy powder coated laser cut cases, Autodesk metal-sheet 3D modelling.
build-log http://render.otoy.com/forum/viewtopic.php?f=9&t=42540
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