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RX360 sufficient for i7 IB + 2x7970 or 2x680?

Poll Results: Can the RX360 handle it?

 
  • 41% (7)
    Yep, RX360 got it covered...
  • 52% (9)
    No, you'll need to add a 120mm radiator...
  • 5% (1)
    No way, need a 240mm radiator and to do some modding
17 Total Votes  
post #1 of 12
4/18/12 at 7:21am
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Well, as the title says... looking to cool CPU + 2 GPUs for the new build. I'm using a HAF 932 case (which I would like to reuse and not have to replace). Is a single RX360 sufficient for such a setup? Right now the fans are only in push, but I was considering getting some new fans and possibly doing push pull...

It'd be looking something like:

Radiator - RX 360 (I can easily fit another 120mm radiator to put in here... or if I'm feeling frisky I can fit a RX240 with some modification.
Reservoir/Pump(s) - XSPC Dual Bay res (can either be a single D5 res or I can go double with a second pump if the extra flow will assist in temps due to higher flow)
Tubing - 7/16" x 5/8" over 1/2" fat boy barbs
CPU Block - XSPC Raystorm (unless you'd recommend something different? I've been using a Watercool HK 3.0 on my LGA775)
GPU Block - 2x whatever the top contender is at the moment... If it's still the EK blocks, it'll be 2x whichever card I choose.

So yea... can the single handle it? Would a 120mm fix it if not? Or would I have to mod to make this work...
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Beast of Burden
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post #2 of 12
4/18/12 at 7:28am
The RX360 should be able to handle it as I had an RS360 with an i7 OC'ed to 4GHz and a 570 OC'ed to 1GHz. Considering how hot Ivy is though you might want to wait until a revision is out to address that small problem. The 680s should run cooler than my 570 or equal to considering its 28nm. It would have to be P/P though.
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post #3 of 12
4/18/12 at 7:29am
Well the 680s and 7970s oc like champs so if you intend to go 1200mhz+ on either of them (particularly the 7970) you'll need to add another 120mm radiator. Cooler temperatures are always a plus.
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post #4 of 12
4/18/12 at 7:30am
I had a 920 and 2x 6970s on a GTS360 so yeah you should be fine
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post #5 of 12
4/18/12 at 7:32am
I would get the 120mm just to be safe. I would probably trust a 360 for the chip and 1 gpu for sure, and maybe even it it was a SB chip, It looks like IB is going to be really hot though, and while you could probably be decently well off with just a RX360 for all 3, I think you'll have much better temps and thus much better overclocks if you invest in the 120mm.
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post #6 of 12
4/18/12 at 7:36am
would give a little lower temps than Stock cooling with less sound, but adding just another 120mm would help quite a bit.

I'da rather do 2x 240's than 1x 360 1x 120 though
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post #7 of 12
4/18/12 at 7:47am
Quote:
Originally Posted by Norlig View Post

would give a little lower temps than Stock cooling with less sound, but adding just another 120mm would help quite a bit.
I'da rather do 2x 240's than 1x 360 1x 120 though

Trouble there though is that most cases have room for a triple on top and only a single somewhere down at the bottom unless you start mounting stuff outside the case.
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post #8 of 12
4/18/12 at 8:01am
My analysis in steps:-

1) Stock clock GTX680 SLI consumes, say, 350W under gaming load (ave of 338W-360W)
338W from here:- http://www.techpowerup.com/reviews/ASUS/GeForce_GTX_680_SLI/21.html
360W from here:- http://www.guru3d.com/article/geforce-gtx-680-sli-review/4

2) Intel Ivy Bridge 3770K consumes at 128W.
http://www.anandtech.com/show/5626/ivy-bridge-preview-core-i7-3770k/10

3) So, total wattage= 350W + 128W =~ 480W.

4) Using Skinnee's classification for watercooling performance to predict how a single RX360 performs in dissipating 480W.
Quote:
15º Delta: Low Performance, an overloaded but capable loop.
10º Delta: Average Performance, very capable of good temps and representative of an average system.
5º Delta: High Performance, for those of you looking to achieve the best possible temps.
2º Delta: Ultra Performance. extreme setups only, this would be an ultimate setup where you limit to dedicated block loops.

5) Now, using Skinnee's graph of RX360 (V1), the brown vertical line is ~480W.
533
(http://skinneelabs.com/xspc-rx360-v1/4/)

-To achieve a 10C Delta, you need to run 3 Yate Loon fans at around 1415rpm.
-To achieve a 7C Delta, you run 3 Scythe Ultra Kaze at 2315rpm. Obviously this will generate more noise.

6) So, I say, a single RX360 is sufficient to handle an IB and two GTX680s, especially it is unlikely the two cards and the CPU will be fully game-stressed simultaneously.

I expect, when neither the CPU nor the cards are overclocked, it gets closer to a 5C Delta. If both are overclocked, then it will get to 10C Delta (or a little higher) which is still acceptable.

Lastly, as RX360 has low fin density (ie 8 FPI), using push-pull fans does not really bring a substantial improvement over using just push or pull fans.
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post #9 of 12
4/18/12 at 10:13am
Yes, a 360 will work, it'll just be warm, your inline liquid temp will always be a bit high (delta probably 10 or so), you gear will probably run a bit warm also, but nothing compared to that of a stock fan.

You can consider a high FPI radiator and some 1800+ RPM fans that'll balance it out some if noise is not a issue.. If you go the low FPI rad route, your radiator will be quite warm..

There is no rule that you have to have a lot of radiators, though some of us are crazy enough to have 4-6 rads... in the end, here are your choices..

More Rad + Low RPM fan = quiet and cool (low FPI rad)
Less Rad + high RPM fan = Loud but cool (high FPI rad)
Less Rad + low RPM fan = quiet but hot (low FPI rad)

I did a GTX480 which is known to cook eggs literally on a 120 high FPI rad with a 3000RPM delta for the fun of it, was loud like a truck on full load, but the results was suprisingly a lot better then the stock cooler..
Edited by frank anderson - 4/18/12 at 10:16am
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post #10 of 12
4/18/12 at 10:21am
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