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Thermochill vs Blackice Radiators & Quiet Fan Question

post #1 of 13
Thread Starter 
I'm working on designing my WC system and choosing parts for it.

I noticed in the Monthly Roundup Guide that the two quietest radiators are 1st, the Thermochill PA 120.3 & 2nd, the Blackice Pro 3.

I looked at the "Where to Buy" store list sticky and found 4 stores that sell the Thermochill PA 120.3 However, none of them have it in stock.

Does anyone know where you can actually buy one of these? I'd like to get as much stuff as possible from one place to minimize shipping but am finding that is an issue as places seem to have only some of what I want.

How much "louder" would the Black Ice Pro III be over the Thermochill?

The price difference between the two radiators is substantial and I noticed under the cooling performance list that the BIP III comes in only at number 5. However the Thermochill is #1 there too.

One thing I find confusing about the BI radiators is that it is hard to understand the difference between the models...apart from the obvious one, two, or three fan models. I even went to the manufacture's website to hopefully see a comparison of the features but no luck.

I'm wondering if BI now has a comparible radiator to the Thermochill in performance and quietness. The most expensive BI radiator I found is the Black Ice Xtreme III but it comes in at #4 on the quiet list.

I figure a big part of the radiator being silent is the quietness of the fans used to cool it. I saw several with good potential:

SilenX Ixtrema Pro 120x25mm 14dBA/64CFM
(I only found these at Voyermods.com)

Scythe S-Flex Fan - SFF21F 28dBA/63CFM

Anyone have experience with these fans? Are they really quiet? For quiet and amount of air they move, would you recommend one of the above, or something else?

Thanks for your help.
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post #2 of 13
http://www.voyeurmods.com/index.php?...=2&prevstart=0
I found this while looking for radiators a while back. Since nobody has the Thermochill PA 120.3(which is supposed to be the best rad) I think this would work as well or better...assuming you have the room.
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post #3 of 13
Thread Starter 
Thanks busa!

The size is no issue because I intend on making everything external...

What is the the difference between a dual pass and single pass rad?
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post #4 of 13
Dual pass has double the internal tubes running thru the rad....it will hold more fluid in the rad itself. Not sure if there is any major performance difference.
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post #5 of 13
I know a place where the PA is in stock.
By the way, SilenX are no where near these. Great all around fans.
Also, see the following image:

The right is the HE, left is the PA. The BIX has about the same fin density, (I think even more spaced.), than the HE.
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post #6 of 13
Thread Starter 
Quote:
Originally Posted by Sun
By the way, SilenX are no where near these. Great all around fans.

The right is the HE, left is the PA. The BIX has about the same fin density, (I think even more spaced.), than the HE.
Thanks for the links and the pic!

So, which is better...fins close together or further apart?

Am I correct in thinking that the radiator which has the fins closer together will be quieter with a lower CFM fan and be better at cooling because there are more contacts with the "water pipe"? Conversely, would it then be louder with a high CFM fan because there is more air flow resistance?

I noticed that the Delta fan you recommend is spec'd at 36dBA. Since I need quiet fans and the Silet Xs are a much lower decibel, why would you recommend the Deltas? Have you had a chance to compare the two fans?

Thanks again for the help!
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post #7 of 13
http://www.newegg.com/Product/Produc...82E16811999127
I use these fans and have been very happy with them.
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post #8 of 13
Fin Density: The denser the fins, the greater the cooling capacity. However, as the CFM output gets higher, the fin density creates too much resistance for the air flow. At that point, decreasing the density allows for the air to flow very easily. At such high CFM's, the low density radiators perform much better than their high density counter parts. That is why the PA is better for fans that are sub 80 CFM, while the HE is the best for the highest attainable performance. The trade off is noise for performance.

Fans: The Deltas I recommended may not display the best CFM to DB ratio, but they are the best fans in this particular case for a few reasons:
1. The PA not only has a high fin density, it is also thicker than the HE/BIX. That creates a lot of air resistance. The said Deltas have an extremely high pressure capability: 4.00 mm H²O. That is desirable for a radiator like the PA.
2. The fan consumes very little power compared to similar fans. I assume you will be using 3, maybe 6 fans total. Lower power consumption may be something that interests you.
3. These fans under-volt very well. Some fans cannot maintain rotation when under-volted below 5, even 7 volts. These fans do very well at low voltages, however. Using them with a fan controller will yield excellent performance.
(2&3): Coupled with their low power consumption and their under-volting performance, these fans can be connected to the same fan controller channel, up to 9 on a single channel in this case. (That is a very popular controller. You can find it about anywhere.) That will allow you to control up to 36 fans from that one controller.
4: Deltas are known for their excellent quality. You cannot go wrong with them.

Good luck.
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post #9 of 13
Thread Starter 
Ah yes...InTheFlow has much to learn.

I really appreciate the help.

If I multiply Amps X Watts...isn't that supposed to tell me something about the fans power or something?

How do you figure out the Max Pressure or is that something we rely on the manufacture’s specs for?

What I got from your explanation about the greatness of the Delta fans makes a lot of sense. It seems like you are basically saying that if I got those fans with a fan controller, I'd be able to have great performance WITH low noise. Is that right?

Does it matter what thickness fans I get? 38 or 25mm?
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post #10 of 13
Good thread, and right-on about radiator design, and fin spacing for different flow rates!

Regarding fans, I bought the Nexus 12cm fans, which were top-rated by SilentPCReview.com , who are very anal about such things. They are low flow and very quiet--should work well with a PA type rad.
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