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D+D DC750 Chiller

post #1 of 8
Thread Starter 
Hi all

Apologies if this is in the wrong section

I have a simple question that I hope somebody can answer.

I have recently purchased a D+D DC750 chiller (not received it yet).

My question is more about comparison between the chiller I have just purchased (DC750) and the one I have seen used in tests - the Hailea HC500a

According to websites the HC500A has Cooling Power of 790W and is 1/2HP and the D+D DC750 has Cooling Power of 750W and it is 1/4hp


Could someone confirm if the DC750 will be able to 'cool' at more or less the same rate/power as the HC500A? Or will it be much much less as its only 1/4hp?

I am only going to be cooling my CPU and nothing else. But if the cooler is capable then I might cool the GPU's too

Many thanks and apologies if I have got anything wrong here, I just thought this would be the best place for my questions

Aly
Edited by alyraver - 7/23/13 at 9:28am
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post #2 of 8
I was looking into these units sometime ago and understand your dilemma...but never really got the bottom of it.

The closest I've got to working it out is with the specs of my ac unit.

Its rated at 12000btu's which when you convert to watts is 3.6kw of cooling power.

The power draw rating of the unit is however 2.6 kw.....so the cooling power is for some reason 1kw greater than the power draw ( how that can be I don't know)......but the point I'm making is that one company may be quoting the power draw and the other the cooling power?

When you compare the Hailea and D&D units model for model the specs otherwise seem very similar.
post #3 of 8
Thread Starter 
I asked on an Aquarium forum, and they seemed to know more about them than what websites could tell me.

From what i understand the D+D DC750 is slightly more efficient at cooling than the Hailea HC500A.

It only needs a 1/4hp motor to provide 750W of cooling power, where as the HC500A needs 1/2hp to achieve a similar cooling rate. - Something along those lines from what they told me. We will have to see how it performs when I get it. I spoke with another dude on here who is using the 1/4hp Hailea Chiller, and he says the results are absolutely amazing, so even if it is only 1/4hp I think it'll be fine (CPU only tho).He said he was getting load temps of 45-50c (i7 3930k @ 5.2) so id say that is very impressive.

I am gonna keep my 360 rad in place with fans, and simply switch off fans for benching etc. The chillers do use a fair amount of elec, so I need to bear that in mind. If it turns out the DC750 is powerful enough to chill x2 780's as well as my 3930k, then i'll prob be cooling them too, but if not then I'll prob run 2 loops

I managed to get the chiller for £150, they retail at £400+ so I recon they are def worth investing in a used one (brand new not too sure, but used I recon you can pick up a bargain). water cooling is great but there's only so much rads and fans will cool, Chillers are def the next step for me, i'm not into sub zero cooling, I just want cool temps and high clocks! thumb.gif
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post #4 of 8
Quote:
Originally Posted by alyraver View Post


From what i understand the D+D DC750 is slightly more efficient at cooling than the Hailea HC500A.

That is exactly what the case is. To put it into car analogy, a standard Ford festiva has a four cylinder engine but makes bugga all power. A Mitsubishi Lancer EVO on the other hands makes lots of power from its four cylinder motor.

The electrical power rating of the compressor can not be used to represent the cooling effect of any refrigeration system. Their is to many other factors involved, if you like I could name a few.

If it labeled as 750W of cooling it should handle a CPU only easy, depending of the efficiency of the block. But if it is anything like many other computer cooling components, it maybe generously labeled.

Not much help I know, but I thought you might be interested.
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post #5 of 8
are you comparing same voltage : 110 volts or 220 volts ? performance is voltage related

http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_373&products_id=32957
http://www.theaquariumsolution.com/dc-750-refrigerated-cooler
http://highflow.nl/extreme-cooling/chillers/hailea-chiller-hc-500a-790-watt.html


using the tech data - weight, Amps , liters, etc it looks like the DD seems to actually be a HC 300 (Ultra Titan 500) with a max capacity of 390 Watts... which is barely enough for a CPU + one modern low-power GPU ... NO overclocking thou

http://www.aquatuning.co.uk/product_info.php/info/p2692_waterchiller-Hailea-Ultra-Titan-500---HC300-395Watt-cooling-capacity-.html

Seems like the DD is "falsely advertised"...but maybe the specs on the site are just not correct & mixed up
you'll only know for sure when it arrives... then you can check the exact specs.. and the serial number... or just the weight smile.gif
if it is a case of "false advertising" you should return it

HC 300 sells for 330-340 & a HC500 for 440-450 in a watercooling shop
the DD seems to be advertised for 400-410 in an aquarium shop... so the DD750 COULD be HC500
post #6 of 8
Thread Starter 
yer I emailed Deltec and asked, and they said that the DC750 sits in between the HC300 and the HC500A as far as cooling performance is concerned.

Will have to wait and see how it does when I get it. Only gonna cool CPU with it so think it'll be more than enough. Someone I spoke with uses the HC300 to cool their 3930k and they said the results were amazing.

I'll let you know how it performs when I collect on Tues biggrin.gif
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post #7 of 8
Thread Starter 
ok so I got it all plumbed in and it works really well, haven't taken water temp too low as its so hot and humid.

I have 1 problem tho:

It was all working perfectly until I realised the res water level wasn't high enough and it sucked a load of air in. Now whenever I turn off the computer the res fills up and overflows - im guessing the trapped air is in the chiller and is pushing the water towards the res when pc turns off?

I have shaken the chiller from side to side gently and that has released some of the trapped air

anything else I can do?

managed to OC to 5.2 no problem on my 3930k, full load max temp was 78c, that's with the chiller water temp set to 18c, so pretty good bearing in mind its currently 30c and really humid thumb.gif
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post #8 of 8
use an intermediate res somewhere between the chiller return and your PC loop end.
If its dimensioned and placed right it can handle the surplus and helps to get the air out.

Personally, i'ld advise a 20 gallon loft tank, but that might not be practical smile.gif
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