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Author Topic: Opinions on running delta fans at max load 24/7  (Read 1367 times)
mackminer
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October 29, 2011, 05:43:13 PM
 #1

Is there anyone here running delta fans on their rigs? I have four on each rig moving 192cfm of cool air over the cards at fairly high pressure.

These 120mm delta fans are ball bearing type and are at max load - Will I have any problems running them at max load like this all the time?

Thanks.

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ssateneth
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October 29, 2011, 06:07:33 PM
 #2

Delta is like server quality. server fans run at 100% 24/7/365 and they don't have problems. fwiw I have this http://www.sidewindercomputers.com/de12tfexhisp.html

cicada
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November 08, 2011, 07:24:51 PM
 #3

Deltas are beasts and are meant to have long lifetimes under full load.

Keep them clean, and keep them lubricated, and they'll last you next to forever.

There's usually a lubricant port underneath the sticker on the hub, just squeeze in a drop every 3-6 mo or so, you can probably go a lot longer but hey, it's a cheap way to keep 'em spinning for a long, long time.

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m3sSh3aD
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November 08, 2011, 07:38:40 PM
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I had a delta years back. Awesome fans, NOISEY AS HELL, but if thats not an issue, you dont get better. Man, i put in on the CPU the wrong way, Was like a tornado Smiley Had to change it as it was for a gaming PC and could hear it downstairs even when throttled lol Smiley
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November 08, 2011, 08:40:27 PM
 #5

Great fans. Just secure them where you expect them to go. Otherwise you end up a fucking angry catfish with two expensive fans with snapped blades because they were balanced on two crappy XFX cards that were overheating, wiggled a bit and the rotor smacked into something hard.

The plastic the fans use is brittle and a slight impact at the speed they go will destroy them instantly. I know this through experience.

I've pretty much lost half my mining profit now due to hardware failures - most due to XFX, but self-destructing fans aren't fun either.

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...so I give in to the rhythm, the click click clack
I'm too wasted to fight back...


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m3sSh3aD
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November 09, 2011, 07:56:23 AM
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Great fans. Just secure them where you expect them to go. Otherwise you end up a fucking angry catfish with two expensive fans with snapped blades because they were balanced on two crappy XFX cards that were overheating, wiggled a bit and the rotor smacked into something hard.

The plastic the fans use is brittle and a slight impact at the speed they go will destroy them instantly. I know this through experience.

I've pretty much lost half my mining profit now due to hardware failures - most due to XFX, but self-destructing fans aren't fun either.

 Angry

XFX man, same here, Im laiden with a 6870 and 6950 cause of XFX's failing on me. Got 1 left and it didnt sound healthy this morning tbh. Bit of a squel from the fan..... AGAIN! Let this be a warning to people Smiley Sapphire have really impressed me in hardware/price(most times) and OC'ing ability and there trixx is alright. Nice and easy.

Back on topic, Delta's are ACE Smiley
Inaba
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November 14, 2011, 01:39:09 PM
 #7

Great fans. Just secure them where you expect them to go. Otherwise you end up a fucking angry catfish with two expensive fans with snapped blades because they were balanced on two crappy XFX cards that were overheating, wiggled a bit and the rotor smacked into something hard.

The plastic the fans use is brittle and a slight impact at the speed they go will destroy them instantly. I know this through experience.

I've pretty much lost half my mining profit now due to hardware failures - most due to XFX, but self-destructing fans aren't fun either.

 Angry

At least you only lost hardware... I have scars on my fingers from almost losing them in the fans Sad

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November 14, 2011, 02:26:33 PM
 #8

Just as a side remark, those fans will use up to 24W each. Thats ~100W per rig for case fans only. Not nothing. You sure you need that much? If you have to pay for electricty Id (re)consider open frame rigs.

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November 14, 2011, 03:09:57 PM
 #9

Really? I thought they were 8 - 10w.  I will have to revisit those fans and see.  Jeez... 24w each?

I'm only running two per rig, but that still adds up across 6 rigs.

If you're searching these lines for a point, you've probably missed it.  There was never anything there in the first place.
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November 14, 2011, 03:28:47 PM
 #10

Well its what I got when I googled 120mm delta fans that matched ~190cfm. I found this one:
http://www.sidewindercomputers.com/delffb1212eh.html

They may have more power efficient fans, but no fan is going to sip power and achieve that kind of airflow.

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November 14, 2011, 04:17:29 PM
 #11

The Deltas are no joke - I'm not surprised to see 24W at all.

Most normal high-flow case fans pull between 5-10W - for example I have a bunch of these 110CFM Scythe slipstreams that are about 6.3W each:  http://www.sidewindercomputers.com/sc12slsy110c.html

[edit] Indeed, you need to be careful to balance power for the Deltas - most fan controllers will allow about 20W per channel - a single one of those Deltas at full-speed/12V can burn out your controller Wink

[edit] bad math - the scythes are 6.3W, not 8.6W - which makes the Delta's draw even more crazy Cheesy

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November 14, 2011, 04:48:20 PM
 #12

Deltas and other 38mm thick fans have high AIR PRESSURE.  So they will have a higher load per cubic foot than other fans optimized for volume over pressure.

Do you need high air pressure?  It depends on what you are using the fan for.  If just using it to blow across an unrestricted space to move hot air well no.  There is very little reistence and the increased air pressure is wasted.  If you are trying to blow across a restricted space (like force air through a high fin density radiator, or force more air through heatsink fins of a GPU then high air pressure may be worth it.

cicada
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November 14, 2011, 04:54:08 PM
 #13

They're also particularly well suited to high-density 3U/4U rackmount servers where noise isn't a real concern - a couple of these will keep a server full of high-load HDDs nice and frosty.

At 65dB+ they're not exactly meant to be in the rig under your desk.


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