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Dual GPU custom watercooling loop...

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/05 14:34:06 (permalink)
I don't know what happened because I had 355.82 loaded last night when I took my 980 out to put the waterblock on it and then this morning when I powered up with both boards installed I ended up with 353.12 which isn't approved for benchmarking. I only lost 9 points in Firestrike but gained almost 100 in 3DMark11. I just played a match in BF4 and my temps capped at 47°C so that looks like my temperature peak right now with all settings at their highest, voltage at 1.262 and core clock of 1526 MHz. I never boost the memory clock higher than +250 because I can't tell any difference with it any higher. Onward and upward from here, right?
 
post edited by Zuhl3156 - 2015/09/08 13:11:24

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/05 14:58:20 (permalink)
Zuhl3156
I don't know what happened because I had 355.82 loaded last night when I took my 980 out to put the waterblock on it and then this morning when I powered up with both boards installed I ended up with 353.12 which isn't approved for benchmarking. I only lost 9 points in Firestrike but gained almost 100 in 3DMark11. I just played a match in BF4 and my temps capped at 47°C so that looks like my temperature peak right now with all settings at their highest, voltage at 1.262 and core clock of 1526 MHz. I never boost the memory clock higher than +250 because I can't tell any difference with it any higher. Onward and upward from here, right?
 



Yup, Keep on Truckin' and moving forward.
 
Like I stated, The Newest Nvidia Drivers are acting kind of strange at times and going to older driver versions have helped me (even with your MSI 980 cards besides the 980 Ti's I mentioned).
You'll notice a difference in Benchmarking Scores more than Gaming when increasing the Memory OC's higher.
 
It's just a matter of experimenting with different OS's/Drivers to get the results you want whether Gaming or Benchmarking.
 

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/05 16:23:45 (permalink)
I decided to try some Folding at Home and my temps went to 51°C and were tickling 52°C. When one WU finished the idle board dropped to 46°C while the other remained at 50°C. I remembered when my PC was on the floor that I had it resting on 2x4 bloocks to keep dust from getting sucked up from the carpet. I found the 2x4 blocks and raised the PC up to allow airflow from the bottom. After two hours of both boards Folding at full strength the temps capped at 50°C and my room temp rose from 74°F to 77°F. She is breathing fire!   My idle board is now dropping to 39 while the one at full load is dropping to 46. It might look homely sitting on wooden blocks but they work, don't they? I'm pretty happy with the way my video boards are performing right now. I don't even enable SLI for gaming, just for benching. BF4 was smooth as silk with FPS around 200. My FPS might have dropped lower but it was hard to check when I was busy getting killed by everyone else on the map. I'll never break any records but I do like to find the best driver for gaming performance. Thanks for all of your assistance and encouragement, hallowen. You too, Scarlet-Tech.

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/05 16:47:38 (permalink)
No Problem Man, I try to Help out wherever I can, and I wouldn't worry about those wooden blocks or whatever else you find that Helps keep the temps down and increases your Fun Factor!
 
Granted, My Benching Systems aren't "Works of Art" by any stretch of the imagination, But due to their somewhat uncommon open-air construction, they DO perform Excellent and run Very Cool when pushing to find the Extreme Limits of their various components.

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/05 17:00:43 (permalink)
My temps continue to drop with only one board folding at 100%. The board under load is now at 43°C while the other has dropped to 36°C and my room temp is still 77F. That's a 3 degree improvement. Something tells me that a single 240 radiator might not be enough. I have both radiators sucking air from the inside of the case rather than have hot air blowing over my drives, video boards, and motherboard. I turned my rear case fan around to blow cold air in and two Cougar Vortex fans running at full speed blowing air in the front. This case is out of room for any more fans. I still have a minimum of 25°C temperature drop over air cooling. I'll have to start saving up and shopping around for a case that can handle a 360 and 240 radiator. I am just entering the learning stage of liquid cooling. Maybe there's still hope for some of us old geezers, eh?

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/05 17:09:05 (permalink)
Zuhl3156
My temps continue to drop with only one board folding at 100%. The board under load is now at 43°C while the other has dropped to 36°C and my room temp is still 77F. That's a 3 degree improvement. Something tells me that a single 240 radiator might not be enough. I have both radiators sucking air from the inside of the case rather than have hot air blowing over my drives, video boards, and motherboard. I turned my rear case fan around to blow cold air in and two Cougar Vortex fans running at full speed blowing air in the front. This case is out of room for any more fans. I still have a minimum of 25°C temperature drop over air cooling. I'll have to start saving up and shopping around for a case that can handle a 360 and 240 radiator. I am just entering the learning stage of liquid cooling. Maybe there's still hope for some of us old geezers, eh?




LOL, I'll be turning 70 this coming Monday on Labor Day, But That Still won't Stop my "Insane" thirst for More Speed and Higher Scores!


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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/05 17:13:56 (permalink)
Well, happy birthday! I'll reach the big six uh-oh next March.

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/05 17:40:44 (permalink)
Thanks, I'm Still hanging in there.
 
BTW, If you need more Cooling you can always use Outside the case Radiators.
 


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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 07:19:32 (permalink)
I found a temporary solution until the weather gets cooler. While I was Folding at Home my boards were passing 55°C so I took the side panel off and nailed it with some cool air from my floor fan. I know it's not an original idea but it does work. I really need to get more air into my case.
 

 

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 07:49:19 (permalink)
Zuhl3156
I found a temporary solution until the weather gets cooler. While I was Folding at Home my boards were passing 55°C so I took the side panel off and nailed it with some cool air from my floor fan. I know it's not an original idea but it does work. I really need to get more air into my case.
 

 




LOL, That's how I originally provided more cooling when I first had a Fully enclosed Case, Then went to Chilled Water and Phase Change Which eventually over the years ended up becoming the Open Air Platform I use Today.

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 08:04:47 (permalink)
I had been thinking about what would happen if I made a plexiglas reservoir to hang on the side of my case that I could dump a tray of ice cubes into when needed. I'd have the intake hose on the bottom and return hose on the side. A two gallon capacity would be ideal to scoop some warm water out and dump some ice into it. That either sounds like a good idea or totally ridiculous but not as silly as trying to mount one of these to the front of my case:
 

 
http://www.amazon.com/Dayton-Model-1TDN2-Blower-CFM%C2%A0%C2%A03340/dp/B000TKAQKU/ref=sr_1_sc_1?ie=UTF8&qid=1441551560&sr=8-1-spell&keywords=dayton+airblower
 

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 08:38:52 (permalink)
I wouldn't even try to use a squirrel cage fan (too loud!) for case cooling, and while the ice container will work it will require constant trips to the Fridge for more ice.
At one time in the past, I've even tried routing a 6" flexible Duct Hose from one of my nearby Central A/C vents into the PC Case! 
 
If you're serious about keeping components cooler while Folding 24/7, Besides the option of Just using the additional outside radiators I mentioned, You could consider an aquarium chiller, But you would have to make sure you get a Large Unit because the small ones won't maintain temps with a Constant High Heat Load of the 980's and CPU (Been There, Done That).
 
Necessity is the Mother of Invention, and you'd be surprised at what others have come up with to provide additional cooling for their PC's.
 
 

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 08:49:36 (permalink)
hallowen, you must be a mind reader! I was just looking at this to give me nice cool filtered air and it would solve the noise problem providing 430 CFM of airflow:
 

 
 
http://www.amazon.com/iPower-GLFANXINL6FILT6MD25C-6-Inch-25-Feet-Ducting/dp/B00DIIPTHA/ref=sr_1_1?ie=UTF8&qid=1441554411&sr=8-1&keywords=carbon+filter+air+blower
 

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 09:26:39 (permalink)
Yeah, If you wanted to try that it would Probably provide better case airflow, and at least you would have 30 days to return it if you decided it wasn't reducing the case temps.
 
IMO, The Graphics and CPU would benefit much more with just going with the additional radiator route for cooler water cooling temps.
 

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 09:43:20 (permalink)
I'll have to find a bigger case. Corair has a few that meet my needs and look appealing but I'm really stuck on the white color right now. I think white just looks cleaner. Trying to get a PC case powder coated would be a hassle. I'm getting pretty fed up with this mechanical keyboard not typing or double-typing my characters. I spend more time proofreading my posts and correcting everything than I do typing the original response. Everyone said you need a mechanical keyboard, they're the best...    NOT!

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 10:18:43 (permalink)
You wouldn't have to buy a bigger case, Just adding an additional back or top-of-the-case outside triple 120mm fan/radiator (360) onto your existing water cooling loop would do the trick.
 
For Example, Even a stand-alone outside fan/radiator would look good next to your white case.
 
 
 

post edited by hallowen - 2015/09/06 10:39:53

ASUS: Rampage VI Extreme | i9-7940X | 2X RTX 2080 Ti Kingpin SLI | 32GB DDR4 3200MHz Memory - SAGER: NP9870-G | i7-6700K | GTX 980M 8GB | 64GB DDR4 | 950 PRO M.2 512GB | 17.3 QHD 120Hz Matte G-Sync | Prema bios - EVOC Premamod:  P870TM1 | i9-9900K-LM | RTX 2080N 8GB | Modded Vapor Chamber | 32GB 3000MHz Ripjaws | 960 EVO M.2 1TB | 17.3 3K QHD 120Hz Matte G-Sync | Intel 8265 -
 
 
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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 16:32:01 (permalink)
I lowered the voltage and things are good today at a steady 45°C Folding on both boards. I was running at 1.262v and got a Core x21 WU that raised the temps on me. Once that loop gets hot it takes a while to cool back down again. I got a few Core x21 WU earlier and everything was good at stock voltage. Panic attack over.

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 16:46:06 (permalink)
Glad to hear the temps are better and back under control while Folding.... That is unless you decide in the Future to install a Third MSI 980!  


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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 16:56:53 (permalink)
hallowen
Glad to hear the temps are better and back under control while Folding.... That is unless you decide in the Future to install a Third MSI 980!  



A third and possibly fourth MSI GTX-980 Gaming 4G video board is on my to-do list but I didn't win the EVGA Z97 Classified motherboard. Maybe next year?

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 17:16:02 (permalink)
Zuhl3156

A third and possibly fourth MSI GTX-980 Gaming 4G video board is on my to-do list but I didn't win the EVGA Z97 Classified motherboard. Maybe next year?




I'm sure you'll find that installing that Type of Setup would definitely require some serious Cooling.
 
Multiple GPU SLI setups can tend to be pretty addictive (Trust Me!)

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 17:26:49 (permalink)
hallowen
 
 
Multiple GPU SLI setups can tend to be pretty addictive (Trust Me!)


I know, I know. I can run any game on Ultra settings with a single board but I have to have a second video board for SLI no matter what. My PC looks withered and naked without two video boards.

 
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hallowen
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Re: CPU GPU cooling question... 2015/09/06 18:00:02 (permalink)
LOL, I can hardly wait for 2016 when there is the possibility that with the upcoming Nvidia Pascal GPU's and NVLink (Replaces PCIe Maxwell 4-Way Technology) you can run 8-Way SLI , But you'll more than likely have to resort to a completely different MB/Memory and CPU arrangement, Not to mention applying for a second Mortgage to Pay for it All!
 
 

 
post edited by hallowen - 2015/09/07 13:12:30

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Zuhl3156
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Re: CPU GPU cooling question... 2015/09/06 18:07:49 (permalink)
I'm lucky to be able to buy one high-end video board per year. By the time I assembled a collection of eight identical boards they would be ready for the Smithsonian!

 
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Zuhl3156
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Re: Dual GPU custom watercooling loop... 2015/10/11 14:57:12 (permalink)
Went with an EK parallel terminal block. Installed it today and rerouted the flow to go from the pump directly to the radiator before going to the terminal block then back to the reservoir. Almost but not quite three hours from start to finish.
 

 
post edited by Zuhl3156 - 2015/10/11 15:00:13

 
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Re: CPU GPU cooling question... 2015/10/12 15:49:29 (permalink)
hallowen
LOL, I can hardly wait for 2016 when there is the possibility that with the upcoming Nvidia Pascal GPU's and NVLink (Replaces PCIe Maxwell 4-Way Technology) you can run 8-Way SLI , But you'll more than likely have to resort to a completely different MB/Memory and CPU arrangement, Not to mention applying for a second Mortgage to Pay for it All!
 
 

 




Not to mention you would have to do some serious upgrades to your GPU loop, might need to grow it, but at least 2 more pumps to run the 2 cards per loop thing  you are doing right now.
 
Also I am trying to imagine what the new SLI bridges would look like.
 
Also I think the CPU on a single proc system would quickly become the bottleneck.
 
I can't imagine the power usage of 8 KPEs on sub zero would be, or even just sub ambient like you run.
 
As far as costs go, start racing people for money, im sure you can win a lot that way..... in locations where friendly wagering is legal, of course!
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Re: CPU GPU cooling question... 2015/10/12 15:52:22 (permalink)
@Zuhl, once you get some more radiator realestate into your loop you should see your temps drop a lot.  Brink OC and lots of voltage and the hottest I got them was 11 or 12c above ambient, and that was a temp it twitched to, not sustained.  Generally under benching load im around8-9c above ambient and games are typically6-8 depending on the card.  So I think with a bit more heat be3ing displaced your loop will start to cool VERY well.
#56
Zuhl3156
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Re: CPU GPU cooling question... 2015/10/12 16:06:57 (permalink)
The highest that I've reached was 50°C when Folding overnight. Normally stays around 38-40° when gaming if it even gets that high. IDK what my ambient temps are in Celsius and nobody measures PC hardware in Farenheit. I'm just too lazy to use my Windows conversion calculator so we're at a standstill for the moment. I'm happy with the results I'm getting. 

 
 https://www.heatware.com/u/100032/to
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TECH_DaveB
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Re: CPU GPU cooling question... 2015/10/12 17:15:59 (permalink)
F to C conversion if memory serves if (F*5/9)-32=C
Been a while but I think that is correct, used to know TONS of conversions by heart, just don't use them much anymore.
 
The temps are higher than I have had on an ambient water cooling loop since my Fermi cards, but that is still a great temp (as far as functionality goes) and WAY below air.  Much like Hallowen, I firmly believe you can always get it colder, but in your case I do not think it is needed, but it sure would be fun to push the cooling further.
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the_Scarlet_one
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Re: CPU GPU cooling question... 2015/10/12 17:46:57 (permalink)
The only issue I have with NVLink is that NVidia has already clearly stated that it will not be for the GEForce users, but will be for Tesla style cards, and that it will be for "Deep learning" which has nothing to do with any video game.  Why people are currently blowing the NVlink thing out of proportion baffles me. Also, NVLink is currently for server systems, as stated HERE.  Just to use it would require newer hardware than what we have currently, as they are looking to replace PCIe 3.0 with NVLink directly.  P.S.  This is all based on supercomputers that aren't released yet.
 
Hopefully NVidia finds a way to bring this to the public, as they stated that there will be benefits for lowly gamers (not their words) but it won't be seen like in supercomputers, since we can not demand that sort of support for a video game.  All of the information above isn't coming from review  or tech sites, that is from NVidia an their articles that are easily found all over nvidia.com.  All of the NVlink stuff about making gaming computers faster only comes from tech sites, and not NVidia.. Hopefully we see the benefit compared to PCIe, but I am not holding my breath currently.
 
EVGATech_DaveB
F to C conversion if memory serves if (F*5/9)-32=C  
 



 
google serves.. who needs memory?
post edited by Scarlet-Tech - 2015/10/12 17:49:13


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#59
Zuhl3156
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Re: CPU GPU cooling question... 2015/10/17 04:03:35 (permalink)
Doh! What an idiot. [face palm]  I've been sitting here with a digital thermometer right next to my keyboard to check my ambient temps and all this time all I had to do was push a button to switch it from Fahrenheit to Celsius. OMG!

 
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