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Watercooling for two GPUs - Page 2

post #11 of 29
Thread Starter 
Quote:
Originally Posted by Dr.GumbyM.D. View Post
This is at stock voltage that it's running 900/1375. Not great clocks, but stable, and for stock voltage, I can't complain!

By 10c DeltaT, it means that the difference between the air temperature and water in the loop temperature (water-air), and I only post temps in Celsius to make it easy for people to understand and stay consistent. Here is more info on radiators and conditions, check this out.
That's what I meant, delta temperature. Getting into the watecooling vocabulary already 10c over ambient isn't bad. If those 6950s I'm thinking of buying would run under 60c at 900MHz on the core I would be glad. I have a Accelero XTREME now and it does great job cooling my 6950. I had it at 1GHz with 1.275V but now I run it at 900MHz with stock volts. Never goes above 60c.

Edit: I gathered these parts to my shopping cart, what do you think? It's quite budget but hey, I'm going to put it together and never going to look back (going to check the reservoir now and then of course though).

Shopping cart
Edited by Tuxi - 6/4/11 at 2:17pm
post #12 of 29
'lo there mate.

I've recently gone water cooling, I got the "Rasa Uber 750 RX360 Complete CPU WaterCooling Kit" as a base, and an RX 240 rad, and a pair of XSPC Razor 6970 Full Cover GPU blocks. The upper GPU was running at 91c load (23c ambient temps), and the lower 64c minimum, and the CPU was at 67c or so. After the water cooling, it's all under 40. The GPUs are being cooled by the 360 rad, and they're roughly 10c above ambient at idle, and 17c above with a full load. I went with the 1,850 RPM GentleTyphoon fans, and have 5 of them on my rads, and I can barely hear them, even though the case is on my desk, behind my monitors, maybe 4 feet away. If you're looking for a quiet combination, go with the RX360 rad, and 3 or 6 GentleTyphoon fans. Though make sure to get the 1,850 RPM ones, as there are 1,100 RPM ones out there as well.

Cheers mate, and good luck!
post #13 of 29
Quote:
Originally Posted by Tuxi View Post
That's what I meant, delta temperature. Getting into the watecooling vocabulary already 10c over ambient isn't bad. If those 6950s I'm thinking of buying would run under 60c at 900MHz on the core I would be glad. I have a Accelero XTREME now and it does great job cooling my 6950. I had it at 1GHz with 1.275V but now I run it at 900MHz with stock volts. Never goes above 60c.
Good job on the vocab And you're not even in an english-speaking country!

They shouldn't run hotter than 45c core at stock voltage. Mine run at about 43c max with kombuster/furmark. I've currently got a problem of missing two screws, but other than that, my card's temps don't really go beyond 50c ever at overclocked speeds.

After seeing you ranting about mining in another thread I looked into it. It seems silly, but hey, I'm glad you've found use to it
post #14 of 29
Thread Starter 
Quote:
Originally Posted by Diber View Post
'lo there mate.

I've recently gone water cooling, I got the "Rasa Uber 750 RX360 Complete CPU WaterCooling Kit" as a base, and an RX 240 rad, and a pair of XSPC Razor 6970 Full Cover GPU blocks. The upper GPU was running at 91c load (23c ambient temps), and the lower 64c minimum, and the CPU was at 67c or so. After the water cooling, it's all under 40. The GPUs are being cooled by the 360 rad, and they're roughly 10c above ambient at idle, and 17c above with a full load. I went with the 1,850 RPM GentleTyphoon fans, and have 5 of them on my rads, and I can barely hear them, even though the case is on my desk, behind my monitors, maybe 4 feet away. If you're looking for a quiet combination, go with the RX360 rad, and 3 or 6 GentleTyphoon fans. Though make sure to get the 1,850 RPM ones, as there are 1,100 RPM ones out there as well.

Cheers mate, and good luck!
Thanks I'm quite needy when it comes to silent computing. I have a case that has been heavily modified with noise dampening stuff and using three Noctua 120mm fans to move air at 600rpm but then again this is my main computer. The folding/mining rig I'm putting together will be in some lonely corner crunching numbers, lol

Edit (ONCE AGAIN):

Quote:
Originally Posted by Dr.GumbyM.D. View Post
Good job on the vocab And you're not even in an english-speaking country!

They shouldn't run hotter than 45c core at stock voltage. Mine run at about 43c max with kombuster/furmark. I've currently got a problem of missing two screws, but other than that, my card's temps don't really go beyond 50c ever at overclocked speeds.

After seeing you ranting about mining in another thread I looked into it. It seems silly, but hey, I'm glad you've found use to it
Thanks mate, I was always quite good at english, never really put any thought into it though. Computer world taught me

45c sounds excellent. I could run them at 1.3V 1GHz if the rad performs THAT well.

Could you point the thread out please, I can't remember ranting anywhere.. But then again, written text is easily misunderstable, true story.
Edited by Tuxi - 6/4/11 at 2:27pm
post #15 of 29
Quote:
Originally Posted by Tuxi View Post
Thanks mate, I was always quite good at english, never really put any thought into it though. Computer world taught me

45c sounds excellent. I could run them at 1.3V 1GHz if the rad performs THAT well.

Could you point the thread out please, I can't remember ranting anywhere.. But then again, written text is easily misunderstable, true story.
It wasn't a rant really, just you talking about how happy you were mining. Honestly I looked back through the AMD-ATI forum and couldn't even begin thinking what thread it was.. Sorry.

Yea under 45c at stock voltage (it was actually 37c, I just looked it up cause I keep records), water temp ~33c, room temp ~28-30c, clocks at 900/1375 on crossfire, and CPU @ 4.3ghz, only 1 HW labs GTX360 radiator, and the temp was about the same whether it was my old Yate-Loon 2200RPM fans at 100% or my new Panaflo 2100RPM fans at 100%. That's folding for 24 hours. CPU gets up to 60c in that same setup though, doubt that helps, but it doesn't hurt to give more information
post #16 of 29
Thread Starter 
Thats okay. If someone could share a thought with the shopping cart I created? Is the rad ok? Also I'm hopelessly lost with the tubings and such so if someone could check them too, thanks
post #17 of 29
Your cart is translated from Finnish, so please be gentle with me (and google translate)! For the 6970, I'm told that the Razor 6970 Full Cover blocks are awesome- and I can definitely agree on that point! I've no idea on your selected full cover block, though it does seem pretty good.
I'm not sure why the 180 deg adapter is in there... I can however, suggest a pair of Crossfire Fittings since they're made of pure win and happiness and a dash of joy and ease of installation. I think you're going to use that 180 deg for GPU cooling? If so- Try this kind of setup. Barbs on top, connection fittings in the middle, and plugs on the bottom, making the water go in a giant "U" shape. If not, please disregard that.
The pump /should/ be good for the two GPUs, but not much more. It is the downgraded version of the one included with the RX360 kit that's kicking around (the H2O 750 is included in that kit).
You'll need 2 barbs for your res, 2 for GPUs (together, not each), and 2 for your rad- so that's all good.
I don't know how much hose is included in each hose section, but I used 8.5 feet for my CPU + 2xGPU + 2 rads and that res and pump combo, so you'll need maybe 6-7 feet (I got 10 feet for safety, and some spare for future expansion).
I'm fairly new to this, so I don't really know enough to "rate" the rad or fans. I do know that the RX360 with 3 gentletyphoons mounted externally generate virtually no sound on my desk. Maybe 5 Decibels above room ambient- and that's running at full 1,850 RPM.

All in all, it looks good.

Note: Did some pump research- The X2O 450 pumps 450 Liters per hour. The X2O 750 pumps 750 liters per hour. That said, I've got to figure that the 450 can do 2 GPUs and a 360 rad without any problem.
Edited by Diber - 6/4/11 at 4:55pm
post #18 of 29
Thread Starter 
This should be better http://www.aquatuning.fi/shopping_ca...1db7eaefc6536f

And I was trying to get that U shape but failed miserably, lol. That's the shop from where I'll be ordering.

I understand that I will need six of these for the reservoir, radiator and two for the GPUs. For the GPU-GPU fittings I don't know. Could I make it like this: cool water in > first GPU block > a fitting > second GPU block > hot water out. The other way I came up with is the U shape. Which one would be better?

Edit: Here's a cart I made that includes (at least it does) components required for the U shape GPU setup. http://www.aquatuning.fi/shopping_ca...36e153348d9fe1

Edit: That Razor block would be quite expensive The one I included in the cart was the cheapest fullcover block I was able to find at that website
Edited by Tuxi - 6/4/11 at 5:17pm
post #19 of 29
Here's a quick diagram I made up of how I did it.


Barbs on top, connection fittings in the middle (or you'll need 4 more barbs, and ~1" of tubing twice), and plugs on the bottom, making the water go in a giant "U" shape. Since the water goes in one GPU side, and out the other, you don't need the 180 deg fitting

Hope that helps!
post #20 of 29
Thread Starter 
That does help, thanks. The thing I can't stop wondering about is that won't there be water going from intake through the first GPU block and then to the outlet, like a Y-splitter? I believe that this is a good, working solution but I'd like to understand the concept I modified your picture so maybe my point will be a bit more clear.
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