Some unanswered questions after a week of forum trolling

L3one · 07-23-2005, 04:22 AM

**** This post has evolved, ignore the questions in this first post ******
The most recent post is actually on topic

I am trying to make a high performance silent setup. My idea so far: Put a large HC out the window with high CFM fans. Might add a mini-fridge as a water chiller, and possibly a TEC.

Questions:
1. Can a single MCP600 @ 13.6V handle 2 big rads, CPU and GPU blocks, (+ a pelt)? or would the system require 2? With such a large rad would a Eheim 1060 be feasible? (I would like to keep the cost down)

2. Would this 9.5" x 9.75" HC be worth the $66? I would sheath it with a ~10" fan.

Long Haired Git · 07-23-2005, 06:49 AM

Sigh.

Explain the purpose of the radiators? If the minifridge takes coolant below ambient, all they will do is cool the world down? Or is that your purpose?

A peltier is a 40mm x 40mm square. Typically you have a copper plate on the CPU to spread the collect the coldness of the cold side and apply it to the CPU. The hot side, however, is still 40 x 40. Tragically, most modern CPU blocks are focusing their cooling effort directly above the CPU die. Which, for you, sucks.

Why have peltiers when you have a mini fridge? The fridge should be able to take the coolant down to some freaky low temps (ala Mred32 at OCAU).

Oh, and how silent do you think a fridge is?

L3one · 07-23-2005, 08:37 AM

I dont plan on using the mini-fridge as the main source of cooling. Im already using it as intended, so waterchilling is mostly an after-thought. Because it would be right before the CPU I dont think it will lower the rad below ambient.

phextwin · 07-23-2005, 09:37 AM

The water temp fluctuates about 0.25°C per component (depending on stuff obviously) in the loop.

ergo order in the loop of the fridge is largely irrelevant.

Chiller and an ambiant cooled rad are mutually exclusive too.

maxSaleen · 07-23-2005, 04:38 PM

If you want some serious cooling power, go over to Home Depot and pick up a 5,000 btu window mounted ac unit. Modify it as you have your mini fridge, and use the ac unit as the primary coolant source for your loop. I saw one TODAY for $105 (LG). That should keep things cheap and chilly.

bobkoure · 07-23-2005, 09:40 PM

Quote:

Originally Posted by maxSaleen

That should keep things cheap and chilly.

But not silent - which got mentioned as a goal. Might be time to either give that up or sub-ambient cooling.

L3one · 07-23-2005, 10:25 PM

I would put the AC unit all the way out the window but it would still be able to close entirely, thus blocking out all the noise.

L3one · 07-24-2005, 04:36 AM

Then again, ill just switch to water chilling if I buy a AC. Suggestions for a pump, supposing I do go waterchilling?

Long Haired Git · 07-24-2005, 07:24 PM

Depends on the flow rate requirements of the blocks and the desired performance level.
What flow rate are you after?
What WB are you looking to use?

L3one · 07-28-2005, 03:15 PM

See the Waterchilling Forum over at XS for info

Well, I bought an AC unit, $70 off of ebay. 8000 BTU monster that weighs like 75 pounds. The condensor and pump are huge, and the evap starts developing frost in about a minute. I plan to put the evap in a cooler filled with ~50% antifreeze/ 50% distilled alcohol. The mixture should get down to about -30 deg. C. Then you pump this through a normal WC setup.

I was looking at an Iwaki WMD30RLT, because it was made to pump chemicals. I chose the 30 because the antifreeze really kills flow rates.

I have also heard that the Danner Mag 3/5/7 are good for this sort of thing, but does anyone here have a recommendation?

bobkoure · 07-29-2005, 10:49 AM

Maybe a peristalsis style pump to push the ice slush through?

Actually, given the temp of your coolant, I'm not sure flow matters all that much - who cares if the cpu/coolant delta is even 5C greater than it would have been with decent flow - just dial the coolant temp down that much more.

BTW, have you done any below-ambient cooling before? Just doing the "mad scientist" thing or do you actually expect to get usable additional speed over simply keeping the processor at ambient?

redleader · 07-31-2005, 12:18 AM

Quote:

Originally Posted by L3one

See the Waterchilling Forum over at XS for info

Well, I bought an AC unit, $70 off of ebay. 8000 BTU monster that weighs like 75 pounds. The condensor and pump are huge, and the evap starts developing frost in about a minute. I plan to put the evap in a cooler filled with ~50% antifreeze/ 50% distilled alcohol. The mixture should get down to about -30 deg. C. Then you pump this through a normal WC setup.

I was looking at an Iwaki WMD30RLT, because it was made to pump chemicals. I chose the 30 because the antifreeze really kills flow rates.

I have also heard that the Danner Mag 3/5/7 are good for this sort of thing, but does anyone here have a recommendation?

8000 BTU is a little large, but the only thing it'll hurt is your energy bill I guess.

07-23-2005, 04:22 AM	#1
L3one Cooling Neophyte Join Date: Jul 2005 Location: Seattle, WA Posts: 5	Waterchilling pump ** This post has evolved, ignore the questions in this first post **** The most recent post is actually on topic I am trying to make a high performance silent setup. My idea so far: Put a large HC out the window with high CFM fans. Might add a mini-fridge as a water chiller, and possibly a TEC. Questions: 1. Can a single MCP600 @ 13.6V handle 2 big rads, CPU and GPU blocks, (+ a pelt)? or would the system require 2? With such a large rad would a Eheim 1060 be feasible? (I would like to keep the cost down) 2. Would this 9.5" x 9.75" HC be worth the $66? I would sheath it with a ~10" fan. Last edited by L3one; 07-28-2005 at 03:20 PM.

07-23-2005, 06:49 AM	#2
Long Haired Git Cooling Savant Join Date: Jan 2003 Location: Sydney, Oz Posts: 336	Sigh. Explain the purpose of the radiators? If the minifridge takes coolant below ambient, all they will do is cool the world down? Or is that your purpose? A peltier is a 40mm x 40mm square. Typically you have a copper plate on the CPU to spread the collect the coldness of the cold side and apply it to the CPU. The hot side, however, is still 40 x 40. Tragically, most modern CPU blocks are focusing their cooling effort directly above the CPU die. Which, for you, sucks. Why have peltiers when you have a mini fridge? The fridge should be able to take the coolant down to some freaky low temps (ala Mred32 at OCAU). Oh, and how silent do you think a fridge is? __________________ Long Haired Git "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." (Prof. Gene Spafford) My Rig, in all its glory, can be seen best here AMD XP1600 @ 1530 Mhz \| Soyo Dragon + \| 256 Mb PC2700 DDRAM \| 2 x 40 Gb 7200rpm in Raid-0 \| Maze 2, eheim 1250, dual heater cores! \| Full specifications (PCDB)

07-24-2005, 07:24 PM	#9
Long Haired Git Cooling Savant Join Date: Jan 2003 Location: Sydney, Oz Posts: 336	Depends on the flow rate requirements of the blocks and the desired performance level. What flow rate are you after? What WB are you looking to use? __________________ Long Haired Git "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." (Prof. Gene Spafford) My Rig, in all its glory, can be seen best here AMD XP1600 @ 1530 Mhz \| Soyo Dragon + \| 256 Mb PC2700 DDRAM \| 2 x 40 Gb 7200rpm in Raid-0 \| Maze 2, eheim 1250, dual heater cores! \| Full specifications (PCDB)

07-23-2005, 08:37 AM	#3
L3one Cooling Neophyte Join Date: Jul 2005 Location: Seattle, WA Posts: 5	I dont plan on using the mini-fridge as the main source of cooling. Im already using it as intended, so waterchilling is mostly an after-thought. Because it would be right before the CPU I dont think it will lower the rad below ambient.

07-23-2005, 09:37 AM	#4
phextwin Cooling Neophyte Join Date: Dec 2004 Location: Geelong, Australia Posts: 16	The water temp fluctuates about 0.25°C per component (depending on stuff obviously) in the loop. ergo order in the loop of the fridge is largely irrelevant. Chiller and an ambiant cooled rad are mutually exclusive too.

07-23-2005, 04:38 PM	#5
maxSaleen Cooling Savant Join Date: Dec 2004 Location: Orlando, Florida Posts: 383	If you want some serious cooling power, go over to Home Depot and pick up a 5,000 btu window mounted ac unit. Modify it as you have your mini fridge, and use the ac unit as the primary coolant source for your loop. I saw one TODAY for $105 (LG). That should keep things cheap and chilly.

07-23-2005, 10:25 PM	#7
L3one Cooling Neophyte Join Date: Jul 2005 Location: Seattle, WA Posts: 5	I would put the AC unit all the way out the window but it would still be able to close entirely, thus blocking out all the noise.

07-24-2005, 04:36 AM	#8
L3one Cooling Neophyte Join Date: Jul 2005 Location: Seattle, WA Posts: 5	Then again, ill just switch to water chilling if I buy a AC. Suggestions for a pump, supposing I do go waterchilling?

07-28-2005, 03:15 PM	#10
L3one Cooling Neophyte Join Date: Jul 2005 Location: Seattle, WA Posts: 5	See the Waterchilling Forum over at XS for info Well, I bought an AC unit, $70 off of ebay. 8000 BTU monster that weighs like 75 pounds. The condensor and pump are huge, and the evap starts developing frost in about a minute. I plan to put the evap in a cooler filled with ~50% antifreeze/ 50% distilled alcohol. The mixture should get down to about -30 deg. C. Then you pump this through a normal WC setup. I was looking at an Iwaki WMD30RLT, because it was made to pump chemicals. I chose the 30 because the antifreeze really kills flow rates. I have also heard that the Danner Mag 3/5/7 are good for this sort of thing, but does anyone here have a recommendation?

07-29-2005, 10:49 AM	#11
bobkoure Cooling Savant Join Date: Feb 2003 Location: USA - Boston area Posts: 798	Maybe a peristalsis style pump to push the ice slush through? Actually, given the temp of your coolant, I'm not sure flow matters all that much - who cares if the cpu/coolant delta is even 5C greater than it would have been with decent flow - just dial the coolant temp down that much more. BTW, have you done any below-ambient cooling before? Just doing the "mad scientist" thing or do you actually expect to get usable additional speed over simply keeping the processor at ambient?

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