Web Hosting Talk : Web Hosting Main Forums : Colocation and Data Centers : Need help on heatsinks :(

[TheGreat1]

Right got two questions for putting a 1u/2u heatsink on a XP 3200 (non 64bit). We are currently stuck on what heatsink to use:

The selection:

http://www.akasa.co.uk/akasa_english...pec_ak_350.htm
http://www.akasa.co.uk/akasa_english...c_ak_350_2.htm

Out of the two above I couldnt tell the difference apart from one has a bigger fan. Which would be better?

and the other option was:

http://www.dynatron-corp.com/product...odel.asp?id=86
On these I had one question, I use these type on a dual xeon server and never had a problem but cant remember if the black fan bit blows out the hair via the duct or sucks in the air in.. Anyone know? Also anyone know where to get these online and quickly without using racksurf.co.uk

-Chris

[gbjbaanb]

The magic number is the CFM, considering the heatsink looks to be the same size. The larger the CFM, the more air pashed around, so the 350 is the more powerful fan, so it will be the cooler performer.

Dabs.com has some 1U akasa HSFs, including the 350.

[cwl@apaqdigital]

oh, by all means, go with the active blower type from either Dynatron or Cooljag.

the top-mount fan has the tendercy to fail in 1U over time becuase there usually is very little clearance between top of the fan and the bottom of top cover to allow adequate air flow to be either drawn in or pushed out. a failed fan can result in severe consequence for AMD XP chips:
http://www.webhostingtalk.com/showthread.php?t=288511

[KarlZimmer]

Originally Posted by gbjbaanb

The magic number is the CFM, considering the heatsink looks to be the same size. The larger the CFM, the more air pashed around, so the 350 is the more powerful fan, so it will be the cooler performer.

Dabs.com has some 1U akasa HSFs, including the 350.

The issue is, the CFM is calculated with the assumption that there is plenty of air to pull in. Being almost against the top of the case, there will be much greater resistance. Definitely go with a blower. Note: In a 2u you don't have nearly the number of issues with cooling.

[dkitchen]

Take the dynatron, don't even think of trying to use direct upwards airflow, it doesn't work and just creates a mess inside the case. Then point your dynatron in the direction that the air is leaving the case with the assistance of front/rear fans depending on which direction you've got it configured for cooling. Air should then flow nicely through your case cooling it effectively.

[TheGreat1]

Ill add to this that its acctually going into a 2u case, sorry I didnt mention this. Reason why I go for the smaller heatsinks and fans is i have had a bad example with a 2u heatsink and fan. It was crap and just let the server over heat

[TheGreat1]

Ok really stupid question: On the Dynatron ones, Does the black fan duct.. Blow the air out of the duct or suck the air in the duct.. This was a discussion me and my partner had and couldnt find the answer.

Also another question, any ideas where else you can get the dynatron heatsinks quickly? Ie before Tuesday Night

[cwl@apaqdigital]

the active blower on Dyantron or Cooljag does "suck" the hot air from copper heatsink, then "blow" it out toward the direction where the blower is pointing. so, you will need to evaluate the air-flow carefully depending on which chassis and motherboard you have, and decide whether you need 90-degree or 180-degree version.

Dynatron UK Authorized Distributors:

Eye Systems Ltd
8 Ranmore Rd
Dorking, Surrey, RH4 1HA
United Kingdom
+44 (0) 8452 608908 Main Phone

Pegasus Controls & Electronics Ltd
Unit 3
Eastmead Industrial Estate
Midhurst Road
Lavant, Chichester PO20 7JG
United Kingdom
+44 (0) 1243 785288 Main Phone

[TheGreat1]

Yea found them and ill give them a ring.. Does anyone know the password for Eye Systems Excel Price List?! Whats the point of putting it public if you password the dam file

[FluffyTigger]

Shouldn't you get something bigger than that? I've just had a 1U experience with the heating problem, I tried like 3 different heatsinks and found the giant copper block to be the best one. Need an airshroud piping lots of air into it. I was hitting about 60C with a heatsink/fan setup similar to what's picture. Giant heatsink took it down to about 52C, the airshroud took it down to about 47C.

[TheGreat1]

After looking at the case and motherboard, a dynatron 90 degree blower would blow straight into an exaust fan. Perfect for getting the heat away from the processor.

Now just some where to order from.

-Chris