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240 or 360 Rad?

post #1 of 12
Thread Starter 
Hey everyone,

I am about to embark on a build and I was hoping to get your opinions on dual GPU cooling. I am going to either be getting dual GTX 670s or waiting and getting dual GK110s when they release in a few months. With that being the case I was looking at a Corsair 600T case and using a 120 and a 240 radiator for the CPU and 2 GPUs respectively. However I am debating the cooling potential of a HWLabs SR1-240 for two GPUs.

Do you think that a single 240 can handle either 2 GTX 670s at 340W before OCing or the new GK110s which will be over 400W before OCing? I figure if I need to I can go to a 360 and get an Obsidian 800D, but I would prefer a mid tower.

Also, in terms of fans I was looking at Corsair SP-120s or some Gentle Typhoons.

Thanks for taking a look!smile.gif
Edited by Stack0verflow - 9/11/12 at 11:43am
post #2 of 12
That 240 SR-1 will only dissipate around 200 watts with high speed fans (2200 RPM +). It would be a poor choice to attempt to cool dual GPU's. Even a single 360mm rad is going to need some good air to cool off dual GPU's at 100% load.
 
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Black Mamba
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post #3 of 12
I highly doubt that the GK110 will be available in a couple months, the 6xx line isn't even finished. I would suggest the 670s which will be more than powerful enough.

Also, for SLI and water cooling, you may really want to reconsider your case choice. I personally wouldn't go with anything less than a 360/420 AND a 240/280 for a loop with 3 major heat sources.
     
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post #4 of 12
Thread Starter 
Hmm, I may try an Obsidian 800D with an BlackIce 360 in the top and a 240 in the bottom. If only I had the tools to mod the bottom for the 240; that and deft hands to mod with.biggrin.gif
post #5 of 12
If you want to have more room for rads without the extensive modding that the 800D can require, there are some other options...
The NZXT Switch 810 supports a 360/420 + 240/280 + 120/140
The Xigmatec Elysium supports a 420/480 + 240/280
The Corsair C70 will fit a 280/240 + 240
Those are the ones that come to mind as far as "many rads for little money, without sacrificing quality" cases. There are others, I would just suggest keeping future expansion in mind, because you will always want more rads. Plus, the biggest rads you can fit to start with give you a lot of headroom and are much more efficient than fitting multiple small rads. For example, with an EX420 and UT60 240, I have a bit more surface area than the equivalent of 6.25x120mm rad with 15-18fpi (assuming it is 48mm thick). That's with just two rads, as 420 rads are really a great idea, and the EX420 and Alphacool NeXXos 420 rads are fantastic.
     
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CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingCooling
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 
CoolingCoolingCoolingCooling
2x Corsair SP120-PE Case Fans Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 
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Mechanical (Browns) NZXT HALE90 850W NZXT Switch 810 (White) R.A.T.3 + MX510 
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My Desk GRADO RS1i Headphones Grado PS1000 Headphones Bitfenix Hydra Pro Fan Controller 5ch 30W/ch 
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post #6 of 12
You can use 240 for the gpus as long as it's double thick. I had no problems with my thermochill pa120.3 and a 5GHz 2550K and 2X 5870s. I also had great temps when I used a single RX 240 with my current system.
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post #7 of 12
Thread Starter 
I wish I could find what I was looking at earlier but I cannot seem to find the heat displacement numbers for the rads I was looking at. Also I am an idiot and I put the wrong radiator above. I was looking at the 240 GTX from HWLabs, not the SR1 240 for use with dual 670s or 680s; and a GTX 120 for the CPU. I remember the chart I saw listing their displacement numbers that had their displacement at values higher than what 2 670s (340W before OC) would put out and the 120 showed number that could handle a 3570k (77w before oc) just fine. Now that you mention the Alphacool NeXXos Monsta rads though, they seem awesome.

On a side note, how do you guys feel about CaseLabs stuff? It seems pricey, but I suppose if I need more room, they provide it.biggrin.gif
Edited by Stack0verflow - 9/12/12 at 3:15pm
post #8 of 12
Based on the roumored specs of GK110 there is no way in hell that a single 240mm rad could handle that. I even have my doubts that a thin 240mm rad with a single set of fans could handle two 670s and a cpu. At least not at what I would call a reasonable fan speed.

You can mod a 360 into the roof of a 600t. It really doesn't look hard to do. You can also fit a 180mm in the front. That would give you more than enough headroom.
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post #9 of 12
Thread Starter 
Yeah thin rads I doubt would do it as well. I thought that a thick rad like a GTX 240 or the Alphacool Monsta rad that nleksan linked could work. I have been having a hard time finding heat dissipation ratings for anything besides a GTX 360 though.thinking.gif

I'm thinking I may have to abandon the idea of a mid tower and go full with either an 800D with a 360 + 240 with some mod work, or just say screw it and perhaps get a Merlin from CaseLabs and use a 480 with maybe something else. I'll also take a look at modding a 600T for a 360 right now; thanks for the heads up!
post #10 of 12
id consider alphacool or XSPC or a rad line with lower fins per inch. coming from the GTX line
im getting a considerable better temperature with a lower FPI radiator even using 2200rpm fans.
now i can lower the fan rpm and lower the roaring sound and decrease temps.
especailly if it is a 24/7 machine.

airdeano
  
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