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post #11 of 47
Quote:
I don't have my GPU's yet so I can't measure the heat output.

Thankfully heat output is very closely correlated to power consumption (almost all of the power goes in and comes out as heat) so you can just take number from there

300w is pretty easy to hit/pass on 780ti's and 290/290x's afaik
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post #12 of 47
Thread Starter 
Well at least that is easy. Now how much heat a monsta 360 can dissipate
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post #13 of 47
There should be charts like this:



maybe not the easiest to find though. That's a random result from google
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post #14 of 47
i know my 60mm NOVA 1080 rad can handle about 1200W with a 10°C delta, and 6x140 +2x120 is nearly the same aera of rad , but i don't know about the thickness. And fan speed vs thickness is what matter a lot too.
i only have a 4670k and a 7970 @ 1200 in the loop atm , i get something like 3-5° delta between air and water with 4x180mm phobia fans
Edited by Ashuiegi - 3/25/14 at 2:13am
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post #15 of 47
OK, first I see you like the acetal blocks, I bought a serial and a parallel because I wasn't sure what would be best and since they were fairly cheap I figured why not, right? In the end I stuck with the serial but either way, they are VERY sturdy and allowed me to install the waterblocks and serial mount outside on my workbench, then I simply plugged in all three cards at the same time into the motherboard without any issue. So beyond the obvious scope of their function they do make your life easier to install three of them smile.gif

As far as Cyro999 said, basically if the temperature of your liquid itself is hot then its simply not going to help much with actually cooling down your components. The radiators as you know dissipate the liquid's heat thus bringing down the temperature of the liquid so that it can absorb more heat from your water blocks.

My Koolance RP-1250 reservoir/pump has the additional Koolance SEN-FM18T10 plugged in which allows the RP-1250 to display both the flowrate as well as the temperature of the liquid itself. For me, when I ran the loop without the two separate 3x140mm radiators the liquid would slowly get hotter and hotter until I had to stop gaming out of fear that I'd crash the system with high temps. With 1 of the 3x140mm radiators I found that liquid's temperature would get up to around 40c-42c under stress, and with both of the radiators it would stay around 32c under stress (with 27c at idle). By stress I simply mean playing Battlefield 4 with max settings for a couple hours straight on multiplayer mode

Technically you really should use Prime95 to stress testing a system, but for myself I don't transcode x264 (cpu heavy process) as I transcode all my videos on one of my dedicated servers that I have running in a data-center for my VPS/web hosting company. So really the most amount of abuse that I throw at this system at present is with Battlefield 4, however I am almost done with building a near replica of the Cessna 172p that I fly in real life so I might get to abuse this rig with some flight simulators, but we'll see smile.gif So really unless your just doing Battlefield 4 don't hold me to these temps as their not "scientific" stress test results, rather just real life usage examples...
post #16 of 47
Thread Starter 
1. I have to know where to find your rad, that's one I could mount to my wall for extra cooling at home.
2. With 3x360 (which is exactly 1080). I will go either 80mm thick with one set of fans on around 1450 RPM (SP120 Quiet Edition) or 60mm thick push/pull, same fans.
3. I'll see if I can find any details on Alphacools website. EDIT: found something about the UT60 360

Picture courtesy of Martinsliquidlab.org
4. I currently have no loop, just my CPU and GPU at the moment, so I don't even know what fluid will be in the loop let alone the temperature.
5. As for the EK-FC Bridge, I don't think it will fit with a Z87 motherboard, because of PCi-e slot spacing on the 8-series boards. At least it won't fit mine, the only one that fits is one those ugly CSQ ones frown.gif
Edited by TTheuns - 3/25/14 at 6:56am
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post #17 of 47
Link to where you can buy the same rad as me: http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=25417

I'm not sure exactly which rad your looking going to end up getting, but with my Black Ice GT 420 rad (3x 140mm) I was able to use these mounts:
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_457_335_986&products_id=28789 (used to mount on top of my case, could be used to mount to a wall as you said, note that I bought two of these for 1 rad and it securely fits 6x noctua fans, fan mesh filters, and the radiator itself by using machine screws bought and cut to size from home depot or lowes).
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_457_335_982&products_id=25631 (mounts my radiator behind the case)
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_457_335_982&products_id=26348 (mounts my 140mm radiator to the mount's 120mm hole spacing)

EK-FC Bridge should work still though, and you don't need to get the CSQ ones.

I think the issue you have is that the 1st and 2nd GPU are spaced farther than the 2nd and 3rd GPU? If so they got this for the Z77 which should still work for you: http://www.ekwb.com/shop/ek-fc-bridge-triple-serial-z77-csq.html

Might be best to just measure up the spacing on the board and see if it matches EKWB's product specifications.
post #18 of 47
Quote:
Originally Posted by TTheuns View Post

I need to know how much I need for a tri-SLI 780 Ti setup with a 4770K. All in one loop. Since all of it will be overclocked I know the standard (#ofcomponents x 120mm + 120mm) formula won't suffice.

1. Yes, any method that assigns the same vaue to a 130 watt CPU and a 300+ watt GFX card just isn't going to work.

2. Here's a step by step based upon test results available on Martinsliquidlab site

http://www.overclock.net/t/1457426/radiator-size-estimator

I start every one of my own or a user's builds with "the dream". I plan out the build for a Delta T of 10C. Then I look at the results and see if a) it will fit in the chosen case, and b) if it's within budget.

3. Heat is simply a direct measurement of wattage in all but a few instances. It's all about conservation of energy. All energy must be accounted for. For example, a pump converts electrical energy to mechanical energy which is converted into moving water..... so a pump which draws say 50 watts might produce like 10 watts of kinetic energy and allt he rest is given off as heat.....

A CPU ......a GPU, no moving parts, no kinetic energy, 100% of that energy is converted to heat.

5. Is noise imprtant to you..... if it is, you won't be using anything faster than 200 rpm fans and likely running them at 850 rpm max.

6. Rad thickness does basically squat..... looks cool but really doesn't do the job. Proof is in the pudding:

ST30-360 - 30mm thick - 219 watts @ 1250 rpm
XT45-360 - 45mm thick - 222 watts
UT60- 360 - 60 mm thick - 227 watts
Monsta - 360 - 86mm thick - 239 watts

So doubling ya rad thickness from 30 to 60 gets ya a whopping 3.6% increase in cooling

Each 780 Ti is going to draw about 300 watts overclocked about 25%....a LGA 2011 OC'd CPU about 230....add 40 watts for the MoBo of cooling that, 20-40 for the pump, 3-5 for each RAM stick. For arguments sake:

MoBo Block = 20 watts (VRM only)
780 Ti = 300 watts x 3
LGA 2011 CPU = 230 watts
Swiftech 35X2 = 40 watts

That's 1190 say 1200 watts.

Assuming 60% of that actually gets handled by the rads (rest lost to to inactivity ... everything not peaking at once, tubing, res, shrouds all radiate heat) leaves ya with 720 watts.

Let's assume:

XT45-420 @ 1650 rpm in push / pull = 391 watts in top of case
Monsta-360 @ 1650 rpm in push / pull = 383 watts in bottom of case

That's 774 watts which should leave ya with a theoretical Delta T of 9.3C. Now I should correlate that with my on direct experience on my last build. I have twin 780s and a 4770k, 35x2 and MoBo block. My theoretical Delta T was 11.3C. I wound up with 8.4C with fan filters removed and 12.8 with fan filters in place....so the method did pretty good.

You can find all the rad data in the files ya can download in the link above. 1650 rpm is a bit load for me .... but in normal gaming you should be able to keep to about 2/.3 of that speed....1050 or so.

I'd recommend the Phanteks Enthoo case which will easily fit those rads ...on the downside, ya can't use the very excellent Phanteks fans which top out at 1250 rpm for ya rads. If ya drop down to just two 780s (the 3rd really does not give ya much, not only would have save the $700 card, but ya could get away with a 420 + 280 and 1250 rpm fans running at 850 rpm for an extremely quiet rig.

Then again, if ya wanna keep the 3 cards, and ya can live with a Delta T of 14C, you could expect CPU temps of about 75, GPU core temps of about 48C (VRMs @ 54C) with an ambient of 22C and 36C coolant temps.....all with just a 420 + 280 in P/P at 1250 rpm..... knock off @ 2C if ya take off the filters, add 2C if ya leave em on.

-Alphacool rads rule Martins testing from 600 rpm on up.
-Koolance 380i won extreme systems COPU WB Roundup on LGA 2011
-EK owns the GPU WB crown, not so much for the GPU temps which it actually loses to XSPC by a degree or so, but for the VRMs where's iuts 12C below some of the competition. I recommend the clean blocks as they are an inch shorter than the acetal ones.

I'd put the 35x2 in there as the pump and run all three cards in parallel....should be able to maintain @ 0.75 gpm per GFX WB and 2.25 gpm thru the CPU. I have the 35x2 on PWM control from about 1.5 gpm (0.75 per block) up to 2.25 gpm at peak but it actually has never climbed that far except under manual control. See martins review of the 35x2.
Edited by JackNaylorPE - 3/25/14 at 9:43pm
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post #19 of 47
Quote:
Each 780 Ti is going to draw about 300 watts overclocked about 25%....a 4.6 Ghz Haswell about 135..

If you're water cooling partially for the sake of CPU overclocking, you'd probably want to use like 1.4v on the Haswell - you can do this on air or clc, it's just very hot especially without delid

that lets power start to approach the 200 watt range for i7

Chart from Sin measuring 4770k power under wprime, which is about where realistic load power numbers for 100% load are - stuff like video encoding, but not stuff like Linpack which can pull much more but have little good reason to be ran ~

c1411aab_yxx.png
Edited by Cyro999 - 3/25/14 at 9:39pm
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post #20 of 47
of course 1200 rpm is way too low for 60 and 80 mm rad, with slow fans they don't give you any benefits , but if you push pull with faster fans they can cool way more , nearly scale up , it depend on fpi too.
if you happen to be in france or around france you can get NOVA 1080 or 1260 rad here : http://www.docmicro.com/
Edited by Ashuiegi - 3/27/14 at 2:54am
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