Two 80mm vs one 120mm fan

funbun · 05-18-2004, 10:47 PM

I'm interested in water cooling my machine. I've already got a new heater core from a local radiator shop for $20

It looks a lot like the radiators you get from Danger Den only it's half the cost and half the asthetics

Anyway, I'm trying to keep this thing under $150 budget. I've got two 80 mm case fans that could be used on the radiator. Would this be better than just using one 120mm? I've got tons of Aluminum tape and could eaily build somekind of shroud, but I really want to build the best system that I can afford.

thanks

cougem · 05-19-2004, 01:20 AM

1 120mm is probably going to be better.

Area goes with radius^2, so you actually get much higher CFMs with a 120mm fan. For example a thermtaltake thunderblade is near silent, yet pushes 78CFM. A silent 80mm fan would push low 30s.

sevisehda · 05-19-2004, 04:24 AM

You could try a push pull setup with the 80s. Since each fan will have to overcome less resistance there will be more airflow. If I were you I'd try the 2 80s if your not happy get the 120mm.

|kbn| · 05-19-2004, 06:05 AM

dont use push-pull as you will get better static pressure abilitys from pull-pull with both fans stacked on the same side.

05-18-2004, 10:47 PM	#1
funbun Cooling Neophyte Join Date: May 2004 Location: Tuscaloosa, AL Posts: 53	Two 80mm vs one 120mm fan I'm interested in water cooling my machine. I've already got a new heater core from a local radiator shop for $20 It looks a lot like the radiators you get from Danger Den only it's half the cost and half the asthetics Anyway, I'm trying to keep this thing under $150 budget. I've got two 80 mm case fans that could be used on the radiator. Would this be better than just using one 120mm? I've got tons of Aluminum tape and could eaily build somekind of shroud, but I really want to build the best system that I can afford. thanks __________________ SYSTEM: A64 3000+ @2.42Ghz w/CO stepping \| Chaintech VNF3-250 \| Sapphire 9600 Pro \| 2x512MB Corsair PC3200 \| Enermax 460w PS \| 2x80 gig IDE HD \| WATER COOLING: DangerDen Maze 4 CPU waterblock \| Hydor L20 waterpump \|Homemade reservior \| Heater core\| biketour.blogspot.com

05-19-2004, 04:24 AM	#3
sevisehda Cooling Savant Join Date: May 2003 Location: NY Posts: 234	You could try a push pull setup with the 80s. Since each fan will have to overcome less resistance there will be more airflow. If I were you I'd try the 2 80s if your not happy get the 120mm. __________________ CPU: Barton2500 @ 2.43 ghz MB: NF7S Rev2 RAM: 2x 256mb Kingston HyperX 3500 HD's: 2x 160gb SATA RAID GPU: Sapphire X800Pro VIVO -> XT Plat(softmod) 520/590

05-19-2004, 01:20 AM	#2
cougem Cooling Savant Join Date: May 2004 Location: Cambridge Uni Posts: 176	1 120mm is probably going to be better. Area goes with radius^2, so you actually get much higher CFMs with a 120mm fan. For example a thermtaltake thunderblade is near silent, yet pushes 78CFM. A silent 80mm fan would push low 30s.

05-19-2004, 06:05 AM	#4
\|kbn\| Cooling Savant Join Date: Feb 2004 Location: W. Sussex, UK Posts: 329	dont use push-pull as you will get better static pressure abilitys from pull-pull with both fans stacked on the same side.

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