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3 way SLI water cooling question?

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Alright I just picked up a 3rd GTX 680. I want to throw it in my water cooling loop. My questions are....

Right now I am using 1x360mm rad and 1x 240mm rad. Will this be enough surface area?
If not would an extra 140mm rad mounted on the back be enough extra?

Second question.... Right now my setup is like this.... Pump/CPU/360mmrad/GPU/GPU/240mmrad/Res. If my cooling is sufficient for adding a 3rd card. Would the pump (D5 variable speed) still be able to push my loop with the 3rd video card block?

Right now I get great temps.... I have yet to see my GPU's go above 43c @ full load (Overclocked to almost 1300Mhz on a 85 degree day) and I have yet to see my CPU go above 70c @ 4.5ghz full load "i7 3770k" (same situation on a 85 degree day)

Or would I be better off maybe keeping the same rads and just buying a second pump and splitting the loops? In which case would a single 360mm rad be enough for 3 video cards?

I have never WC 3 cards before so I am new to this many cards in water cooling.

Thanks guys.
 
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Well with those GPU temps I would think it could handle it just fine. Should be enough rads.

Also i think your system spec are out of date.
 
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You have more than enough radiator right now, and the D5 vario is a really strong pump, you should be ok with that too, if not, turn it up... If I remember right, the 5 position on the pump is nearly, if not the same, as the D5-strong.

I've seen people with similar setups back in the GTX480 days, and the 680 doesn't produce nearly as much heat.
 
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Oct 6, 2009
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2,820 (0.53/day)
Location
Midwest USA
System Name My Gaming System
Processor Intel i7 4770k @ 4.4 Ghz
Motherboard Asus Maximus VI Impact (ITX)
Cooling Custom Full System Water cooling Loop
Memory G.Skill 1866 Mhz Sniper 8 Gb
Video Card(s) EVGA GTX 780 ti SC
Storage Samsung SSD EVO 120GB - Samsung SSD EVO 500GB
Display(s) ASUS W246H - 24" - widescreen TFT active matrix LCD
Case Bitfenix Prodigy
Power Supply Corsair AX760 Modular PSU
Software Windows 8.1 Home Primeum
Thanks guys.... BTW my specs are...

Intel i7 3770k @ 4.5ghz 1.18v
Gigabyte Z77 G.1 Sniper 3
G.skill 8GB 1866MHZ
2xEVGA GTX 680 1xPNY GTX680 3 way SLI
Intel X-25 80GB SSD
Western digital 500GB Black RAID-0
XFX 1050 Fully Mod PSU
Aphacool Variable Speed Pump (Same as D-5
XSPX Bay RES
XSPC 360mm rad
XSPC 240mm rad
EK GTX 680 FUll Coverage water block
XSPC Raystorm CPU Block

in case anyone else wants to chime in..... plus I will update my specs later today. But for right now above is what I currently have.
 
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