Bitcoin Forum
February 26, 2017, 05:27:03 PM *
News: Latest stable version of Bitcoin Core: 0.13.2  [Torrent]. (New!)
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: Opinions on blowing air directly onto 6990's  (Read 973 times)
mackminer
Sr. Member
****
Offline Offline

Activity: 337



View Profile
July 30, 2011, 05:31:33 PM
 #1

Hi,
I have 3x6990's in a haf x case in which the side fan facing the cards is not powerful enough. I am thinking of replacing it with something like this... Would it be ok to blow air at this force onto the cards?

Thanks.

1tpXGRKnzaM42B1A1NZhmsX3tngwkqVEf
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1488130023
Hero Member
*
Offline Offline

Posts: 1488130023

View Profile Personal Message (Offline)

Ignore
1488130023
Reply with quote  #2

1488130023
Report to moderator
pbj sammich
Sr. Member
****
Offline Offline

Activity: 272


Fighting Liquid with Liquid


View Profile
July 30, 2011, 06:58:32 PM
 #2

you didn't actually link anything.....

Assuming it's a fan, if so yes

I have one pointed at mine and works well ~10C drop
mackminer
Sr. Member
****
Offline Offline

Activity: 337



View Profile
July 30, 2011, 07:44:23 PM
 #3

Sorry, but it would be about 250cfm.

1tpXGRKnzaM42B1A1NZhmsX3tngwkqVEf
CanaryInTheMine
Donator
Legendary
*
Offline Offline

Activity: 1568


between a rock and a block!


View Profile
July 30, 2011, 11:56:21 PM
 #4

I have 2 6990 in one rig and am using 450 cfms blowing directly on them from top.  i leave fans on auto with this... runs quieter than setting 6990 fans to a higher constant rate.

| In Default we Trust | Need gold/silver for btc? | Buy bitcoins |
Jack of Diamonds
Sr. Member
****
Offline Offline

Activity: 252



View Profile
July 31, 2011, 12:33:16 AM
 #5

I run cards in a dedicated place with ventilation so just default fans..

If you run these at home you will *need* extra fans blowing air on the cards if you want to actually live in the house.
(Well.. Even if you put them in a basement, many cards next to one another will still run very hot)

The fan noise of these cards at 100% is absolutely unbearable.
Actually measured ~85dB with a professional Extech decibel tester a few meters away, which is not that far away from a small jet engine.

Anyway, if you want to cool a ton of rigs at once, try these. They are very power efficient for the amount of CFM provided.


http://www.seabreeze.ca/fans/TurboAire/turboaire.html

Home Depot, Costco and some other big retailers routinely carry these in their inventory.

1f3gHNoBodYw1LLs3ndY0UanYB1tC0lnsBec4USeYoU9AREaCH34PBeGgAR67fx
Tx2000
Full Member
***
Offline Offline

Activity: 182



View Profile
July 31, 2011, 01:32:24 AM
 #6

@Jack

Do you know the dba on that fan?  Curious as I might pick one up.
Jack of Diamonds
Sr. Member
****
Offline Offline

Activity: 252



View Profile
July 31, 2011, 02:49:25 AM
 #7

Their specs don't list precise dB numbers, but it promises 'whisper quiet' on all speeds. A retailer near you might have a sample piece to try out.

To my ear it sounded maybe ~20dB on high, not whisper quiet but definitely something that wouldn't disturb your sleep. Magnitudes quieter than the 6990 fan on 50%.

1f3gHNoBodYw1LLs3ndY0UanYB1tC0lnsBec4USeYoU9AREaCH34PBeGgAR67fx
Pages: [1]
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!