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How Much Rad Do I Need?

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January 23, 2013 3:04:03 AM

I am starting a new project that I am starting to spec out. My GPU / CPU will be the following:

-EVGA 02G-P4-3660-KR GeForce GTX 660 Ti 2GB 192-bit GDDR5 PCI Express 3.0 x16

-Intel Core i5-3570K Ivy Bridge 3.4GHz

I will probably SLI or upgrade my GPU to a 670 but before I get flamed for WC a 660TI, I am just really into WC and do it more for a hobby than anything. That being said...

I have already chosen some parts but I am trying to decide how much rad I need to ensure proper cooling if I were to SLI my GPU. I also want to pick the right ones. I have enough space for a thick 120x3 rad on a push/pull in the front of my case and another 120x2 or single 120 rad.


Parts Picked for my Loop:

Pump - Swiftech MCP35x
Res - EK X3 150
CPU Block - EK Supreme LTX
GPU Block - Haven't found anything that fits the chipset
Rad 1 - XSPC EX360
Rad 2 ???

Any help / suggestions will be much appreciated.

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a b K Overclocking
January 23, 2013 3:20:03 AM
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As far as blocks go, the EVGA cards are all reference design, and 660Tis use the 670 reference blocks (since both use the short PCB, unlike the GTX 680). You can see what EK has at http://www.coolingconfigurator.com, to get an idea of what the blocks look like.

Your other option is to use universal waterblocks, which are still very good performers, and give you a lot of flexibility when upgrading. I used to be (and hopefully will be again) a yearly upgrader, so not having to buy new blocks all the time was great and made selling the old cards much easier.

Quote:
I have already chosen some parts but I am trying to decide how much rad I need to ensure proper cooling. I also want to pick the right ones. I have enough space for a thick 120x3 rad on a push/pull in the front of my case and another 120x2 or single 120 rad.


The 660Ti has a TDP of 150W, so you'll be ok with a single EX360 if you want. With ~2000 RPM fans you should be able to cool ~400W and maintain an ~8C delta.

More is always better though, and would definitely be a good move if you want quieter fans and/or overclocking headroom.

The other components look good. The pump should last a good long time.
January 23, 2013 3:39:29 AM

Awesome info boiler. I was wondering, the universal gpu blocks say something about setting up cooling for passive RAMs and Mosfest chips. I am a total nub when it comes to this lingo and was wondering what this meant?

I also think I'll probably go for a thick 120 single rad just for shits and giggles.

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a c 168 K Overclocking
January 23, 2013 3:46:35 AM

Basically you will have to stick heatsinks on the RAM and VRM of the board, as the water block will not be covering them.

Those copper spiky things are the heatsinks for the RAM.


Passive just means it cools by convection, air heating up, it rising and being replaced by cool air.
January 23, 2013 11:05:16 AM

Best answer selected by watdadileeo.
January 23, 2013 12:50:49 PM

Thanks for the replies all. I will be starting a new thread soon showing my build. Hope you all tune in.
a b K Overclocking
January 23, 2013 6:58:37 PM

What Manofchalk posted is the basic setup - heatsinks on the VRAM chips. That's the bare minimum and should be sufficient for any GPU with decent airflow in the case.

If you're thinking about doing some voltage tweaking with the GPU, you may want to invest in some for the VRMs. You'll have to look up where the VRMs are on your GPU's board, because sometimes each one is a little different.
a c 324 K Overclocking
January 23, 2013 10:37:44 PM

There is a section in the watercooling sticky that directly addresses this exact thread question.

It also addresses the universal GPU block and additional cooling requirements, as well.

Just FYI.
a b K Overclocking
January 24, 2013 1:42:45 AM

rubix_1011 said:
There is a section in the watercooling sticky that directly addresses this exact thread question.

It also addresses the universal GPU block and additional cooling requirements, as well.

Just FYI.



I guess that's true. I just haven't looked at the sticky in a while ;)  ;) 
a c 324 K Overclocking
January 24, 2013 11:15:56 PM

Welcome back old friend....been busy?

And my post was mostly for the other visitors in the thread. :) 
a b K Overclocking
January 24, 2013 11:43:15 PM

Yeah, graduated, worked over the summer, now in grad school. The last 6 months are kind of a blur but I'm hanging in there. Broke down the RV02 but am hoping to invest some good money in a PC this summer :) 
a c 324 K Overclocking
January 25, 2013 3:16:51 AM

Congrats on the graduation and continuation of education...always a good pick.

Good to see you back around...it's been a little less rowdy and a lot quieter without you here...stick around, will ya? :) 
a b K Overclocking
January 25, 2013 3:19:48 AM

I'll do my best. I need to get my feet wet again - getting a little rusty on the subject ;) 
a c 190 K Overclocking
January 25, 2013 6:55:26 AM

^flushtime then hehe
and make sure your blocks are clean :p 
Moto
!