Re: New High End Build...Two Loops?
 

TERRAMEX: Ok I see you are really pushing the single loop scenario. I was wondering how much flow rates would be affected by using a dual 120 and a single 120 versus a triple 120 Rad. Is this something I need to be concerned about or will the overall surface area of Radiator to Heat source be enough.


Maybe I should mention the other specs of the System:

Pump: Swifty 655
CPU: Swifty Storm
GPUs: DD SLI

All using 1/2".

Re: New High End Build...Two Loops?
 

honestly i have no numbers, but i admit that the dual+single will probably have a higher pressure loss than a triple rad, even if only because of the extra tubing. however, as you said earlier that space was an issue, and you have a mpc655, and 1/2" loop, it shouldn't be that relevant.

Re: New High End Build...Two Loops?
 

And you need to remember, you fan choice will have far more impact on the overall cooling than the dual, dual + single, or triple choice.

If you have hearing protection rated fans I'm sure it will work. Ultra low noise... maybe not. IIRC you have a moderately to highly noisey setup now so a few L1As in push/pull might give you enough cooling with just the dual.


I'm not sure of the flow rate impact but I've hooked up other multi-rad configurations before and measured a drop in flow rate about a 60% increase over the impact of a single rad of the same type. But these were all tests on 3/8" systems so ymmv.

Re: New High End Build...Two Loops?
 

Well Swiftech has this chart for the L/H rating on the pump, I guess it sounds like there should be plenty of room to try to stay above the 1Gpm+ range.

http://www.swiftnets.com/assets/imag...55-800X500.gif

Re: New High End Build...Two Loops?
 

http://www.frozencpu.com/fan-157.html

So I am going to go with these fans on both rads in pull configuration.

Re: New High End Build...Two Loops?
 

Not sure about the 38mm fan.
In a different thread, cathar ( and others ) stated that it does not compensate to have thicker fans versus the standard 25mm fan.
i have two 12v Sunon 38mm fans and they are loud suckers even at low speeds.
Same with a few others I have (including a Panaflo , but its misaligned, vibrates alot).
Suggest you get one (borrow or steal :) ), for testing purposes, before buying a few.

Re: New High End Build...Two Loops?
 

Hmm...good point TerraMex. I have some lower CFM Panaflos right now that I do not think are too loud so I thought these might be better.

I do have a Nexus fan controller so maybe they won't be too loud after all?

Everything I have read tells me that thicker fans are better. I need to find that discussion from Cathar and give it a good read to make up my own mind.

Re: New High End Build...Two Loops?
 

well i can't find the original post (so my comment is as it is), but it i think it was here at Procooling. I'll dig around (or my mind is playing tricks ;) ).
There's a thread about fan's at OC.AU :

http://forums.overclockers.com.au/sh...3&page=1&pp=15

(you need to register)

I'm currently using a Sunbeam controller, the PWM controller (a Aerogate II) gives an annoying whine to certain fans.

Re: New High End Build...Two Loops?
 

Hmm...that is exactly what my Nexus does to one of the 120mm Panaflos. Even at half speed there is this whizzing sound.

I will head on over to OCAU today and do some reading on fans. Thanks. :D

Re: New High End Build...Two Loops?
 

just to point out that i swiched the two sunon 120x120x38 fans with two titan 120x120x25.
Yes, there is less flow (and resulting to less noise) but i no longer hear the fans. even at higher rpm they are much less annoying.
I would consider a tradeoff but i can't really quantify overall performance change, if any. So far, so good.

but again, suggest testing (each setup is a different setup) :) .

Re: New High End Build...Two Loops?
 

Hmm....yeah I might try those fans out.

I am really looking for best noise vs perormance ratio with a slight lean towards performance.

Re: New High End Build...Two Loops?
 

yateloon /tri cod fans with the higher rpms. silent pc review has good reviews and info on them. TEkgems 1800 rpm model I believe it was.....

These would be the best fans fo the new pa series rads because the new rads don't need as much air flow as older He series. It even seems the PA series after a certain CFM point don't get much performance improvement. Marci did the test running Panaflos Ms @ 7V and got good results. I suggest you do a search for that thread mate.

I have the M speed panaflos with hydrobearing, whatever it's called. They get a whine but it's not that bad. It's more like an air movement sound but in a case it is not that bad and better than some other fans at stock speeds. Have to align the fan and have it isolated pretty good.

Maybe because you guys are running the U high speed fan when I'm running the slower 84 cfm one?

Re: New High End Build...Two Loops?
 

http://www.casecooler.com/pa12hywabefa.html
this?
found very little info in that "wave bearing" thing. rifle?

Re: New High End Build...Two Loops?
 

I think these are the fans I am using currently. Need to check when I disassemble my water loop this weekend. MY fans have a low whine to them when running them half speed. I wonder if I got a bum one.

Re: New High End Build...Two Loops?
 

Do you mean run them at half speed on the fan controller or @6-7V. I get the same whine at half speed of the fan controller so its the same on all fans. At the lowest controller setting, I get a hum but they won't start up consistently so I leave it at where it will startup and rig the fan controller with some screws to keep the controller from getting any lower.

My experience is these fans have a distinct point where they hum to whine to vacumn cleaner. I don't know what speed it is but I pretty much leave it at humming. It is noticablely louder than my low speed and low noise CM fans but it gets more airflow even at the lowest setting vs CM fan at stock.

With headphones on during gaming I can't hear anything so I turn the suckers up!

Re: New High End Build...Two Loops?
 

Yes Rice, you are correct on the lowes setting not working too well. My fans do this at every setting so I think something is bummed with one of em as one does it worse than the other.

I have a Nexus fan controller and it does allow me to run the fan at about 65% which seems to be the noise barrier.

Usually I don't care too much about noise anyways since I either have my headphones on or have my 5.1 cranking loud enough that I do not hear the suckers anyways.

As long as I can keep my current noise level I think I will be happy.

Re: New High End Build...Two Loops?
 

So if I just measured and decided that I actually "Do" have room for a Triple 120mm Radiator, would that be a better choice?

I currently have the Thermochill HE120.2 and was going to add a single PA 160 or other 120mm Rad.

Should I just go for the HE120.3 instead?

Re: New High End Build...Two Loops?
 

i'd go for the PA plus the one you already have , but that would depend on the space , and how much you want to spend.

Re: New High End Build...Two Loops?
 

Look at the EBM-Papst D2E133=DM67-78. (420cfm/55dba/1.6in H20). It's about as loud as the two Panaflo Medium speed FBA12G12M1A's (86.5cfm/35.5dbs/4.8mmH20) I have in another system...contrary to what papst says.
Note that 1.6inH20 = 40.64mmH2O! With a decent shroud (pic W/BIX3) it's very quiet, though expensive and/or very hard to get.

Re: New High End Build...Two Loops?
 

Wow that is a serious shroud Bill! Did you make that yourself?