80w Peltier on my GF4--Condensation problem

ramdrive · 08-15-2002, 04:27 PM

I'm very close to finishing my first loop of my watercooled peltier system, its running on the floor right now. I hope this poor quality pic gets in the thread somewhere; no clue how to attach it properly

I cant detect any significant condensation anywhere but the AGP Connector leads. These get pretty cold and wet. I want to eliminate all condensation before i put it in. If there isnt any w/o a heat load there wont be any in my case, right?
My plan to solve the condensation is to simply load the AGP slot with Dielectric grease, will this be enough?

Also if anyone has a better GF4 Ti4400 mod page besides the one at Xbitlabs pls let me know...i want to take the core voltage to about 1.95.

jtroutma · 08-15-2002, 04:32 PM

Try looking at this website:
http://www.maximumoc.com/

Miss_Man · 08-16-2002, 11:45 AM

Here's a good place to start
http://www.xtremesystems.org/forums/...?s=&forumid=85
I'm using an 80w pelt on my GF4 as well. I dont think you need dielectric grease in the AGP slot cos this part gets a little warm when running and its not directly cooled by the peltier. I have no grease on this part and have no problems.
The part you need to take note is the perimeter of the GPU. If you look closely, you'll see that its a little raised and below are metal connectors. I sealed the whole perimeter with silicone here, and also applied a thin layer of silicone on everything near the GPU. Finally, I dabbed some silicone/dielectric grease around the GPU to take care of air pockets, and neoprened the whole side of my cold plate. The previous time I didn't take care of air pockets well enough and I found a huge blob of water when I removed the block.
I have my core at 1.96v. With an 80 watt pelt, you can even go till a bit above 2v as I did. It overclocked a little better but sucked too much juice from my Mobo/PSU.

Sled_Dog · 08-16-2002, 01:41 PM

wait you are gonna use simple transmission coolers and over 300Ws of pelts? can you say not enough cooling?

bigben2k · 08-16-2002, 01:47 PM

You'll need a better rad. Give me the dimensions, and I'll give you a car model# and year. Heater cores are usually 1 5/8, 2, or 2 1/2 inch thick, so take your pick.

ramdrive · 08-16-2002, 03:22 PM

The Hayden kits have worked great so far. The graphics loop's radiator never gets even warm, and the resevoir temp remains static all day. This is with a full 14.8v on the pelt.

I'm not sure how the larger Hayden tranny cooler will perform under the 226w pelt+P4 load of approximatly 400 total watts, but its an even larger model than the one im using in the graphics loop, with its own faster pump. If the side mounted larger radiator for the CPU loop gets warm..so be it. Costs me what 10 degrees? I think any radiator will warm up under that much wattage.

I have 6 Panaflow 80mm low speed fans per radiator, each with its own Rheostat allowing me anywhere from 14.8v down to fan stall speed.

My powersupply is a Pyramid 35amp unit with adjustable voltage up to 14.8. (multimeter reading) Its really heavy and puts out great DC power, and only ran me about 115 bucks shipped.

ramdrive · 08-16-2002, 04:17 PM

The Hayden kits have worked great so far. The graphics loop's radiator never gets even warm, and the resevoir temp remains static all day. This is with a full 14.8v on the pelt.

I'm not sure how the larger Hayden tranny cooler will perform under the 226w pelt+P4 load of approximatly 400 total watts, but its an even larger model than the one im using in the graphics loop, with its own faster pump. If the side mounted larger radiator for the CPU loop gets warm..so be it. Costs me what 10 degrees? I think any radiator will warm up under that much wattage.

I have 6 Panaflow 80mm low speed fans per radiator, each with its own Rheostat allowing me anywhere from 14.8v down to fan stall speed.

My powersupply is a Pyramid 35amp unit with adjustable voltage up to 14.8. (multimeter reading) Its really heavy and puts out great DC power, and only ran me about 115 bucks shipped.

bigben2k · 08-16-2002, 04:24 PM

All right then, but if you ever decide to try something that might cool better, let me know.

Sled_Dog · 08-16-2002, 05:31 PM

I don't know a lot about pelts but to my knowledge the temp on the hot side is not equal to the CPU wattage + the Pelt wattage. I think thats what you were saying.

ramdrive · 08-17-2002, 12:43 AM

Thanks for the help offer on the heater cores. I really gotta finish the CPU block and see how much heat actually gets to the water after the radiator. Today was filled with many troubles, and i have yet to complete the video loop. It just took forever to do the electrical for all the stuff in my case.

08-15-2002, 04:32 PM	#2
jtroutma Cooling Savant Join Date: Aug 2001 Location: SLO, CA Posts: 837	Try looking at this website: http://www.maximumoc.com/ __________________ Athlon64 X2 4200+ @ 2.5Ghz (250FSB x 10) OCZ VX 1GB 4000 @ 250FSB (6-2-2-2 timmings) DFI LANParty nForce4 Ultra-D SCSI Raid 5 x (3) Cheetah 15K HDDs LSI Express 500 (128MB cache) OCZ PowerStream 520W PSU ATI X850XT PE (Stock) DTEK WhiteWater + DTEK Custom Radiator Eheim 1250

08-16-2002, 01:41 PM	#4
Sled_Dog Cooling Savant Join Date: Jul 2001 Location: Snowyland(not Alaska) Posts: 238	wait you are gonna use simple transmission coolers and over 300Ws of pelts? can you say not enough cooling? __________________ pro/chat has a website now? wow

08-16-2002, 01:47 PM	#5
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	You'll need a better rad. Give me the dimensions, and I'll give you a car model# and year. Heater cores are usually 1 5/8, 2, or 2 1/2 inch thick, so take your pick. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

08-16-2002, 03:22 PM	#6
ramdrive Cooling Neophyte Join Date: Aug 2002 Location: Orem, UT Posts: 4	The Hayden kits have worked great so far. The graphics loop's radiator never gets even warm, and the resevoir temp remains static all day. This is with a full 14.8v on the pelt. I'm not sure how the larger Hayden tranny cooler will perform under the 226w pelt+P4 load of approximatly 400 total watts, but its an even larger model than the one im using in the graphics loop, with its own faster pump. If the side mounted larger radiator for the CPU loop gets warm..so be it. Costs me what 10 degrees? I think any radiator will warm up under that much wattage. I have 6 Panaflow 80mm low speed fans per radiator, each with its own Rheostat allowing me anywhere from 14.8v down to fan stall speed. My powersupply is a Pyramid 35amp unit with adjustable voltage up to 14.8. (multimeter reading) Its really heavy and puts out great DC power, and only ran me about 115 bucks shipped. __________________ Working on water cooled peltier system with two transmition coolers and two pumps in an acrylic res. 226w Peltier for my P4, and 80w on my GF4 Ti4400. Also installing a 80 cent brass waterblock on my IT7 Max's northbridge. (its a 3/8" elbow fitting lapped)

08-16-2002, 04:17 PM	#7
ramdrive Cooling Neophyte Join Date: Aug 2002 Location: Orem, UT Posts: 4	The Hayden kits have worked great so far. The graphics loop's radiator never gets even warm, and the resevoir temp remains static all day. This is with a full 14.8v on the pelt. I'm not sure how the larger Hayden tranny cooler will perform under the 226w pelt+P4 load of approximatly 400 total watts, but its an even larger model than the one im using in the graphics loop, with its own faster pump. If the side mounted larger radiator for the CPU loop gets warm..so be it. Costs me what 10 degrees? I think any radiator will warm up under that much wattage. I have 6 Panaflow 80mm low speed fans per radiator, each with its own Rheostat allowing me anywhere from 14.8v down to fan stall speed. My powersupply is a Pyramid 35amp unit with adjustable voltage up to 14.8. (multimeter reading) Its really heavy and puts out great DC power, and only ran me about 115 bucks shipped. __________________ Working on water cooled peltier system with two transmition coolers and two pumps in an acrylic res. 226w Peltier for my P4, and 80w on my GF4 Ti4400. Also installing a 80 cent brass waterblock on my IT7 Max's northbridge. (its a 3/8" elbow fitting lapped)

08-16-2002, 11:45 AM	#3
Miss_Man Cooling Savant Join Date: Dec 2000 Posts: 151	Here's a good place to start http://www.xtremesystems.org/forums/...?s=&forumid=85 I'm using an 80w pelt on my GF4 as well. I dont think you need dielectric grease in the AGP slot cos this part gets a little warm when running and its not directly cooled by the peltier. I have no grease on this part and have no problems. The part you need to take note is the perimeter of the GPU. If you look closely, you'll see that its a little raised and below are metal connectors. I sealed the whole perimeter with silicone here, and also applied a thin layer of silicone on everything near the GPU. Finally, I dabbed some silicone/dielectric grease around the GPU to take care of air pockets, and neoprened the whole side of my cold plate. The previous time I didn't take care of air pockets well enough and I found a huge blob of water when I removed the block. I have my core at 1.96v. With an 80 watt pelt, you can even go till a bit above 2v as I did. It overclocked a little better but sucked too much juice from my Mobo/PSU.

08-16-2002, 04:24 PM	#8
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	All right then, but if you ever decide to try something that might cool better, let me know. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

08-16-2002, 05:31 PM	#9
Sled_Dog Cooling Savant Join Date: Jul 2001 Location: Snowyland(not Alaska) Posts: 238	I don't know a lot about pelts but to my knowledge the temp on the hot side is not equal to the CPU wattage + the Pelt wattage. I think thats what you were saying. __________________ pro/chat has a website now? wow

08-17-2002, 12:43 AM	#10
ramdrive Cooling Neophyte Join Date: Aug 2002 Location: Orem, UT Posts: 4	Thanks for the help offer on the heater cores. I really gotta finish the CPU block and see how much heat actually gets to the water after the radiator. Today was filled with many troubles, and i have yet to complete the video loop. It just took forever to do the electrical for all the stuff in my case. __________________ Working on water cooled peltier system with two transmition coolers and two pumps in an acrylic res. 226w Peltier for my P4, and 80w on my GF4 Ti4400. Also installing a 80 cent brass waterblock on my IT7 Max's northbridge. (its a 3/8" elbow fitting lapped)

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