fan on heatsink....wrong way?

bigsoomo · 12-02-03, 11:14 AM

hey guys i was on another modding website where they do reviews about the new alx-800 and the panaflo fan was on backwards wouldnt that be suckin air away from the heatsink?

unix and linux · 12-02-03, 11:15 AM

Looks like its sucking air from the heatsink..weird

stamasd · 12-02-03, 11:36 AM

I have had great experiences with fans mounted the "wrong" way. I got a several degree improvement in my temps with a Thermaltake Volcano 6 Cu+ with a fan sucking air out.

stan03 · 12-02-03, 12:06 PM

yea its on "backwards" but i know some review places try both ways to see which one gives better temps.

bigsoomo · 12-02-03, 12:21 PM

whoaa i never knew that...

Quote:

I have had great experiences with fans mounted the "wrong" way. I got a several degree improvement in my temps with a Thermaltake Volcano 6 Cu+ with a fan sucking air out.

GlitchOfDoom · 12-02-03, 12:44 PM

Quote:

Originally posted by stamasd
I have had great experiences with fans mounted the "wrong" way. I got a several degree improvement in my temps with a Thermaltake Volcano 6 Cu+ with a fan sucking air out.

There must be other factors involved, such as a heat source near the top of the fan would blow warm air on the heatsink, but if it was sucking it would be pulling cool air from the sides. But if you moved that heatsource and had the fan running the proper way it would prove to be much better than the original setup.

stamasd · 12-02-03, 12:49 PM

Quote:

Originally posted by GlitchOfDoom

There must be other factors involved, such as a heat source near the top of the fan would blow warm air on the heatsink, but if it was sucking it would be pulling cool air from the sides. But if you moved that heatsource and had the fan running the proper way it would prove to be much better than the original setup.

No heat source. Open case, nothing else anywhere near the HSF.

deathman20 · 12-02-03, 12:55 PM

Hmmm intresting makes me wonder if I could put my tornado on backwards and get better temps. Hmmmm

stamasd · 12-02-03, 01:06 PM

It depends on the heatsink. Some have a configuration that works better when blown upon, some the other way.

I.M.O.G. · 12-02-03, 01:30 PM

Quote:

Originally posted by stamasd
It depends on the heatsink. Some have a configuration that works better when blown upon, some the other way.

The alpha PAL is a good example. It has a bit of a shroud which forces the air to be sucked off the heatsink closer to its base - not as much air can shortcut the heatsink base and just go straight into the fan.

The most important variable with different fan performance for sucking and blowing is your case and surrounding elements. In most cases with most heatsinks blowing will be better, but there are always exceptions.

7keys · 12-02-03, 01:39 PM

Yes! When Alpha came out with the fans sucking air off the cpu everybody was trying it. Most people found that it works better blowing. But you never know until you try. I tried it on a few heatsinks without any improvement. It seem you need a shroud of some kind. I put some electrical tape around the top part of the heatsink to make a shroud (for testing purposes) but my temps didn’t improve.

But you never know, with the newer designs in heatsinks, some might work better sucking.

Sniper_83 · 12-02-03, 04:29 PM

Quote:

Originally posted by 7keys
But you never know, with the newer designs in heatsinks, some might work better sucking.

That doesn't sound quite right, LOL!

I'll take that into consideration, the enviornment seams to appear as though it would have a bigger impact than the heat sink.

ie. A PSU blowing on an CPU HS.

GlitchOfDoom · 12-02-03, 10:17 PM

Hey, whatever floats your boat.

nodark · 12-02-03, 10:20 PM

my temps improved by turning my fans around too
easily a 3C drop in cpu temp and case temp

Valk · 12-03-03, 12:09 AM

would sucking from the heatsink not work better for those cases that mount exaust right over the cpu? I was always a little worried about airflow with two fans sucking air away from the heatsink. its why i run with no side panels. i might try it when i get a better case.

I.M.O.G. · 12-03-03, 12:21 AM

Wherever your fans are pointing, you don't want them interfering with eachother. It's better to have them working together than have them counter one another.

cstarritt · 12-03-03, 12:28 AM

before i got my blowers, i had a volcano 12 with the fan backwards ducted to a 120mm panaflo on the top sucking air out. i then had a 92mm and three 80mm fans blowing air into the case. it cooled very well.

12-02-03, 11:14 AM	Thread Starter #1
bigsoomo Member Join Date: Sep 2003 Location: Northern Verrrrginia	fan on heatsink....wrong way? hey guys i was on another modding website where they do reviews about the new alx-800 and the panaflo fan was on backwards wouldnt that be suckin air away from the heatsink? Attached Images
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12-02-03, 11:15 AM	#2
unix and linux Banned Join Date: Nov 2003	Looks like its sucking air from the heatsink..weird
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12-02-03, 11:36 AM	#3
stamasd Member Join Date: Sep 2002 Location: NYC	I have had great experiences with fans mounted the "wrong" way. I got a several degree improvement in my temps with a Thermaltake Volcano 6 Cu+ with a fan sucking air out. __________________ chown -R linux:users /world
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12-02-03, 12:06 PM	#4
stan03 Member Join Date: Mar 2003	yea its on "backwards" but i know some review places try both ways to see which one gives better temps.
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12-02-03, 12:55 PM	#8
deathman20 High Speed Senior Join Date: Aug 2002 Location: Where the Cheese Heads Live	Hmmm intresting makes me wonder if I could put my tornado on backwards and get better temps. Hmmmm __________________ -=The Gamer=- MSI Z68A-GD65 (G3) \| i5 2500k @ 4.5Ghz \| 1.3875V \| 28C Idle / 65C Load (LinX) 8Gig G.Skill Ripjaw PC3-12800 9-9-9-24 @ 1600Mhz w/ 1.5V \| TR Ultra eXtreme 120 w/ 2 Fans Sapphire 7950 VaporX 1150/1500 w/ 1.2V/1.5V \| 32C Idle / 64C Load \| 2x 128Gig Crucial M4 SSD's BitFenix Shinobi Window Case \| SilverStone DA750 \| Dell 2405FPW 24" Screen -=The Server=- Synology DS1511+ \| Dual Core 1.8Ghz CPU \| 30C Idle / 38C Load 3 Gig PC2-6400 \| 3x Samsung F4 2TB Raid5 \| 2x Samsung F4 2TB Heat
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fan on heatsink....wrong way?

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12-02-03, 01:06 PM	#9
stamasd Member Join Date: Sep 2002 Location: NYC	It depends on the heatsink. Some have a configuration that works better when blown upon, some the other way. __________________ chown -R linux:users /world
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12-02-03, 01:39 PM	#11
7keys Member Join Date: Dec 2001 Location: Montreal	Yes! When Alpha came out with the fans sucking air off the cpu everybody was trying it. Most people found that it works better blowing. But you never know until you try. I tried it on a few heatsinks without any improvement. It seem you need a shroud of some kind. I put some electrical tape around the top part of the heatsink to make a shroud (for testing purposes) but my temps didn’t improve. But you never know, with the newer designs in heatsinks, some might work better sucking.
	QUOTE Thanks

12-02-03, 10:17 PM	#13
GlitchOfDoom Member Join Date: Mar 2003 Location: San Diego, Ca	Hey, whatever floats your boat.
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12-02-03, 10:20 PM	#14
nodark Member Join Date: Jul 2003 Location: Harlingen, Tx.	my temps improved by turning my fans around too easily a 3C drop in cpu temp and case temp
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12-03-03, 12:09 AM	#15
Valk Member Join Date: Oct 2002 Location: Chocobo Alley, Aht Urgan Whitegate	would sucking from the heatsink not work better for those cases that mount exaust right over the cpu? I was always a little worried about airflow with two fans sucking air away from the heatsink. its why i run with no side panels. i might try it when i get a better case. __________________ Fumika - HP2710p, My personal Tablet PC slave Intel C2D U7600@1.2ghz - 4GB Kingston HyperX pc5300 - Runcore Pro IV 32gb 1.8" ZIF SSD - 12" LED backlit with Wacom Digitizer - HP Slice Battery +6 hours - 3.1-4 lbs - Windows 7 Home Premium Other Stuff Heat - Watercooled Lian Li PC-V600 - HIME, Watercooled SFF -
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12-03-03, 12:21 AM	#16
I.M.O.G. Glorious Leader Join Date: Nov 2002 Location: Rootstown, OH	Wherever your fans are pointing, you don't want them interfering with eachother. It's better to have them working together than have them counter one another. __________________ The OC Forums Way We are a team. We are a community. We are a fellowship made strong by mutual respect and shared dedication to the task of enriching all who come here. The OC Forums Thank You Thread Put your computer to work for our OC Forum Teams! Try out our POST TEMPLATES, they save you time answering common questions! I spend half my money on CPUs, GPUs, and Liquid Nitrogen. The other half I waste.
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12-03-03, 12:28 AM	#17
cstarritt Member Join Date: Nov 2003	before i got my blowers, i had a volcano 12 with the fan backwards ducted to a 120mm panaflo on the top sucking air out. i then had a 92mm and three 80mm fans blowing air into the case. it cooled very well.
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