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Double Watercool: Passive + Active

M

mcbath

n00b
Joined
Nov 18, 2004
Messages
2
Im thinking of removing the pump from my watercooling and replacing it with the Zalman Reservator passive cooler thing. My idea was that when idle I could just turn the fan off on the water cooling I already have and let the passive cooler do the work in total silence. Then when I get back to loading the system I would just crack the fan back up on the 'other' radiator sp once the water has been cooled by the Reservator it still has to go through my tried and tested radiator/fan set-up for that little extra.

Im cooling both an AMD3000 and radeon9800 pro. Planning to upgrade both to whatever is top of the range in 6 months so this system has to be workable then too.

Im trying to see a down side to this set up : except cost obviously :)

Any input??

I was thinking having the active cooling external to the case too, as the new Nexus Breeze I ordered doesnt look totally well set-up for cramming it all in..... Ill find that out in a few days I guess.

Morgan
 
it sounds nice, but will the pump in the zalman thing have enough force to get through the radiator too?
 
mcbath said:
Im thinking of removing the pump from my watercooling and replacing it with the Zalman Reservator passive cooler thing. My idea was that when idle I could just turn the fan off on the water cooling I already have and let the passive cooler do the work in total silence. Then when I get back to loading the system I would just crack the fan back up on the 'other' radiator sp once the water has been cooled by the Reservator it still has to go through my tried and tested radiator/fan set-up for that little extra.

Im cooling both an AMD3000 and radeon9800 pro. Planning to upgrade both to whatever is top of the range in 6 months so this system has to be workable then too.

Im trying to see a down side to this set up : except cost obviously :)

Any input??

I was thinking having the active cooling external to the case too, as the new Nexus Breeze I ordered doesnt look totally well set-up for cramming it all in..... Ill find that out in a few days I guess.

Morgan
Click to expand...

I actually have a hand-built setup very similar to what you are trying to achieve. A while back, I scrapped my cryo-cooler in favor of a more forgiving system, with less maintenance. What I designed was this: A watercooled system with a five gallon passive-evaporative setup integrated with an active cooled radiator. The passive evaporative setup consists of a ten gallon, sealed glass tank. The tank is filled with a five gallon mixture of distilled water (4.6 gallons), 1 bottle of Redline Watter Wetter, and .4 Gallons of distilled/ethanol based windshield washer fluid. The top of the tank is sealed with a plate of plexi-glass, and is sealed with clear packing tape. The system is completely water and air tight, otherwise the evaporative system would not function. In line with that is a new copper/aluminum heater core out a '65 Mustang. Two dual-ball bearing 92MM fans out of an old sun server were attatched to the core, which 1/2 inch OD fittings were used throughout. A hand-built aluminim water block with 4.2 square inches of internal surface area was built, and a steel hold down mechanism was also added. An Eheim 1048 keeps the water moving.

Here are the results: Running the system at idle from a dead stop for two hours produces idle temps in the low 90's Farenheit. Running the system at full load for a week straight produces CPU temps of 118 Farenheit. This is on an AMD Athlon FX-53 at 1.675 volts, 2.575Ghz. My power supply is limiting my overclock right now. The system is just dead reliable. The heater core has trememdous heat shedding abilities, and the passive evaporative setup just enhances that ability. The large amount of coolant also acts as a great buffer, preventing any sudden spikes in temperature, and maintaining system stability constantly. That's it for the pro's.

Cons:
Cost. Being hand-build cuts cost significantly, but doing it with retail parts would become very expensive.
Size: The system takes up quite a bit of real estate, especially paired with a 24" CRT monitor, and Antec SOHO case.
Weight: Five gallons of water, plus the tank and everything else puts quite a load on my desk.

Hope this helps,
Matt.
 
linger said:
it sounds nice, but will the pump in the zalman thing have enough force to get through the radiator too?
Click to expand...

Yeah that was my worry too. I don't suppose having two pumps inline is a good idea though :)
 
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