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Double mounted radiator, will it work?

post #1 of 38
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Hi all,

So I am looking to do my first water cooling loop and I was tossing some ideas around, just curious to know from anyone with more experience if they are valid.


Would it impede performance to mount two radiators against each other cooled by two 120mm fans or have a radiator/fan set-up against another radiator/fan setup?


My reasoning is I currently have a Corsair H100 mounted in the top of my case in a push-pull configuration with my 2X240mm case fans, I would like to add a water cooling loop but I’m not the sort of person who likes to waste a perfectly good piece of hard ware by swapping it out in an upgrade. Also the reason i want to the H100 mounted inside the case is for appearance plus it gives me an excellent reason to tinker which is what I think owning a rig is all about.

I would like to perform a red mod on my Radeon Powercolor 6970 and swap its cooler out with the H100. While putting the water cooling loop I plan to buy onto my CPU.

I know I can just add my graphics card to the loop and save myself the trouble but I want to upgrade to the Sapphire 7970 Duel-X eventually and from what I’ve read it’s difficult to find a compatible full-cover water block. The Sapphire specifically because people have gotten good overclocks with it and its one of the few 7970s that isn’t voltage locked as yet. But I’m open to suggestion.


Water cooling gear I am looking to buy:

Pump/Reservoir
http://www.pccasegear.com/index.php?main_page=product_info&products_id=21957

Water Block
http://www.pccasegear.com/index.php?main_page=product_info&products_id=21983

Radiator
http://www.pccasegear.com/index.php?main_page=product_info&cPath=207_160_297_922&products_id=13082

Fans
http://www.pccasegear.com/index.php?main_page=product_info&products_id=19134

Compression Fittings
http://www.pccasegear.com/index.php?main_page=product_info&products_id=21838

Tubing
http://www.pccasegear.com/index.php?main_page=product_info&products_id=22153


**Saving on the pump/reservoir because without including a graphics card to the loop I don’t think I need a Laing D5 or equivalent plus i don't have a very large budget**


I was thinking this kind of configuration:



Problems I think may be:
Mounting and securing but anything can be achieved with cable ties
Power requirements I have a Corsair TX750
Case size restrictions, I worked this out and it will fit although it will sit in front of the CPU and graphics cards and I’m not exactly sure on the size of the Koolance water block, perhaps a radiator as shallow as the corsair which will definitely fit as the distance from the mount to the top of the CPU is roughly twice the distance of the current H100 radiator/fan setup, by visual inspection.

Case is the Thermaltake Chaser MK-1
Asus P8Z68-V Mobo


Please Give me your thoughts,

Thank You
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post #2 of 38
TBH, I would just get a 360mm radiator kit set up and ditch the Corsair unit all together.
I understand that you want to do the mod however *it is cheaper to go that route.

But for performance I wouldn't "sandwich" radiators together, I've tried it, all it does is take up space.

I've use swiftech's stackable radiator set up, sure it works but per performance I was better off just saving money and adding a 240 radiator, which I did later.

I think it was Martin that did a test on this and has said there wasn't really a use for it*along the lines of*, but what you have planned I would just skip it entirely.

If space is an issue I would get a thicker radiator with some great performing fans in push pull, then go from there.

Stacking radiators isn't good, any way you put it, cause the hot air will have to go somewhere and that somewhere will be through the adjoining radiator.
Like I said, it's not worth taking up all that space and I promise you later on down the road you will wish you would have done it right the first time.

Good luck and happy modding.
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post #3 of 38
Pretty much like running a window AC unit in the middle of your living room... lol
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post #4 of 38
Quote:
Originally Posted by v1ral View Post

TBH, I would just get a 360mm radiator kit set up and ditch the Corsair unit all together.
I understand that you want to do the mod however *it is cheaper to go that route.

But for performance I wouldn't "sandwich" radiators together, I've tried it, all it does is take up space.

I've use swiftech's stackable radiator set up, sure it works but per performance I was better off just saving money and adding a 240 radiator, which I did later.

I think it was Martin that did a test on this and has said there wasn't really a use for it*along the lines of*, but what you have planned I would just skip it entirely.

If space is an issue I would get a thicker radiator with some great performing fans in push pull, then go from there.

Stacking radiators isn't good, any way you put it, cause the hot air will have to go somewhere and that somewhere will be through the adjoining radiator.
Like I said, it's not worth taking up all that space and I promise you later on down the road you will wish you would have done it right the first time.

Good luck and happy modding.


The problem isn't the air temps, it's air flow restriction. If you can maintain airflow rates then in theory sandwiching radiators COULD work, however you'd need a REALLY powerful fan to accomplish this, most likely something along the lines of the Delta 252s. So far I haven't been able to find any threads involving such a test. The air is moving to fast for the temp of it to rise a significant amount, it gets it's performance because there is a LOT of it removing heat. When you sandwich radiators you add a LOT of resistance to that airflow, which causes the flowrate of the air to drop dramatically.



As for the OPs question, it won't work at all. You don't have enough static pressure to come anywhere near what you'd need to keep flowrates at a decent CFM rate. Beyond that, YOU'RE USING SPECTRE PRO FANS FOR RADIATORS?!?!?! Do NOT use those, you would have similar performance using those radiators passively than when you were using spectre pro fans. They have a static pressure of .4mmH2O, which is just appallingly low. Get some Bgears fans, or Scythe GTs if your a low noise kind of person.
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post #5 of 38
I can highly recommend xigmatek clf-f12xx series of fans if you want quietness and good static pressure.
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post #6 of 38
Quote:
Originally Posted by crappy View Post

I can highly recommend xigmatek clf-f12xx series of fans if you want quietness and good static pressure.

..... According to their website they have 75CFM with 1.6mmH2O static pressure with 24dBA noise... That's actually pretty bad...
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post #7 of 38
 
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post #8 of 38


I'm not a fan of those tests. (no pun intended)

They fail to list the static pressure of the fans used in them, let alone the model of the fan. They also fail to list the fin thickness, or fins per inch of the radiators used. I would like to see some tests performed with some properly high static pressure fans (Like the Delta 252 fans) with low FPI radiators. Then measure the CFM at the exit of the rads, and compare that to two separate rads with the same CFM on the rads exit.



Those tests are inconclusive at best, but to tell us that under normal circumstances it is highly impractical.
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post #9 of 38
Thread Starter 
Well that puts that into perspective. I guess I'll just go with a loop capable of adding a GPU when I finally get one.

I obviously didn't put enough research into my components for the loop, the only fan specifications I factored was CFM.

Did a bit of reading and the Scythe GT AP-15s seem like the way to go.

Does anyone have any suggestions as to the best radiator to use with these fans? or the best 3 fan radiator in general?
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post #10 of 38
Quote:
Originally Posted by Im Batman View Post

Well that puts that into perspective. I guess I'll just go with a loop capable of adding a GPU when I finally get one.

I obviously didn't put enough research into my components for the loop, the only fan specifications I factored was CFM.

Did a bit of reading and the Scythe GT AP-15s seem like the way to go.

Does anyone have any suggestions as to the best radiator to use with these fans? or the best 3 fan radiator in general?


Depends, General consensus would say for a moderate Static Pressure like the Scythe GTs the best way to go is the Alphacool mosta rads. I, however, would imagine that if you went with the B-gears fans that you would have a LOT better performance with something like the XSPC EX360, which has a really high fins per inch rating. This means it will have a LOT more restriction, but will also have more surface area to remove heat from.
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