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advice on how to do loops

post #1 of 7
Thread Starter 
Hi all, i have the following hardware,
i7 2600k water cooled
and 2 x 6990 water cooled,
i have the following water cooling kits,
1 dual bay res+ pump, 1 x 240mm rad , 1 x 120mm rad both mounted mounted inside,
i also have 1 x 360 external rad 1 x 480 external quad rad pump and res external.

i was planning this setup,
internal res-pump-240-cpu-120-res
external res-pump-360-gpu1-480-gpu2-res.

is this the way i would get the best cooling any adice greatly recieved?
rolleyes.gif
post #2 of 7
oy..umm ..i'm not the bestest @ this.. i'd run splitters on mine if i was to do it..res-cpu-pump-rad-res
res-gpu-pump-rad-res

..but my rad/res is a bit different..

http://www.overclock.net/t/406256/the-official-bong-lovers-club-56k-fail/0_20

1 splitter after res..and 1 before rad
 
Thuban Powah!
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Thuban Powah!
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cheap! Newegg box panel ibeats with onboard. 
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post #3 of 7
Thread Starter 
Any more input guys? as going to otry and get it sorted on monday if i get time.
post #4 of 7
What you suggested is pretty good. However the rads for the gpus are a little overkill I'd say, but as you already have them, it's not a big deal. You might be better off selling your existing pump/res combo (I assume it's the xspc 750 from the rasa kit), and combining your loops into one, and adding a 2nd pump in series with your external pump. Single loops generally get better temps assuming sufficient pumps, however as you are overkill on rads, you may see little benefit.
     
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post #5 of 7
Thread Starter 
At the moment i am only running res pump- gpu1-gpu2-120-240-res.
Due to new machine, but I have the other cooling bits from another pc.
At the moment the 6990s are over clocked to 1000/1500 and kick out some real heat, FurMark for 40 mins sees 78 degrees while BF3 fpr 3 hours see’s no more than 65. The reason i wanted to split them is, I now want to o/c my cpu to 5ghz stable and low temp but the way it currently is the temps would not allow this.
The computer shop i got it from wants me to run FurMark and cpuz blend for 1 hour with temps lower than 80 to increase my oc to 4.8 then 5.0 to keep the warranty.

And what is the theory of single loop getting better temps and 2 ( i know water cooling is not always as obvious as that) but surley with the 6990's on a different loop and not in the case they are two differnt loops and should run better apart? or am i miles off here.
Edited by dvs raider - 11/26/11 at 3:15pm
post #6 of 7
The reason single loops are generally regarded as better is because you're not usually stressing your cpu and gpu's fully simultaneously, this way the power gets dissipated evenly across all radiators. The coolant temps will be slightly different in each case, when by sharing resources the coolant would be close to an average of the two. You can achieve somewhat similar results though by sharing a reservoir. However like I said, the theory assumes equal flow rates which usually means more pumps or at least a series pump block.

However the more stuff you have in the loop the more pump power you need. Temps are not always obvious and you can't assume even basic things like adding a radiator will help your temps as the extra restriction can sometimes hurt you more than the extra cooling helps. What I would suggest is trying both options, get an excess of tubing and just try it out and find which works best for you. There is no right answer that anyone can give for your specific case, all we can do is give our best guess based on what we've seen.

The real question is, do you want to improve cpu temps or gpu temps or both? 78C loaded sounds awful hot for a watercooled gpu, even a monster like the 6990. My OC'd 480's never go above 63C even when running 1200W of gpu/cpu folding through a single loop with only 2x360 rads.
     
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Crucial M4 DT 5Noz, Koolance Full Cover GPU blocks, EK ful... Win 7 64 bit Pro Dell U3011 + 2005WFP 
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EVGA NEX1500 CaseLabs TX10-D + Pedestal Logitech G5 Razer Goliathus 
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Asus Essence One 
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CPUMotherboardGraphicsRAM
i7-3930k @ 4.?GHz Rampage IV Extreme 2x 8800GT 32GB Dominator GT 2133 CL9 
Hard DriveCoolingOSMonitor
2xX25-E Raid 0, 1xC300 128GB, + Mechanicals DT 5Noz, EK full cover GPU blocks, EK full cove... RHEL 5.5 WS Dell U3011 + 2005WFP Portrait 
PowerCaseMouse
AX1200 CaseLabs TX10-D + Pedestal Razer DeathAdder 
CPUMotherboardGraphicsRAM
3930K@4.8 Rampage IV Extreme GTX580 3GB Tri SLI, GTX460 FizzyX 16GB Samsung SuperOverclockingTiny DDR3 
Hard DriveCoolingOSMonitor
Crucial M4 DT 5Noz, Koolance Full Cover GPU blocks, EK ful... Win 7 64 bit Pro Dell U3011 + 2005WFP 
PowerCaseMouseMouse Pad
EVGA NEX1500 CaseLabs TX10-D + Pedestal Logitech G5 Razer Goliathus 
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Asus Essence One 
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post #7 of 7
Thread Starter 
Yeah it is hot but bear in mind there are 2 x 6990 so quadcrossfire- quad cores to cool hence the thought of the over kill rads and seperate loop.
They are powercolor 6990 premounted water blocks so should be ok and not down to my rush style fitting of the block etc.
I guess i could take both loops from the same res and use 2 pumps as there is enough blanked holes on the rear of it for 2 more.
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