tyan s2882 opteron 246 heat question

I found one of my issues - besides not having the best airflow through
these 2U chasis, these fans are NO GOOD!

<a style='text-decoration: underline;' href="http://www.orbitmicro.com/products/accessories/cpu%20fans/DC1U-B04.htm" target="_blank">http://www.orbitmicro.com/products/accessories/cpu%20fans/DC1U-B04.htm</a>

With these fans I was running @ 63C (145F) per CPU at idle!!! I have
since swapped with these fans:

<a style='text-decoration: underline;' href="http://www.orbitmicro.com/products/accessories/cpu%20fans/E2U-K65CS-01.htm" target="_blank">http://www.orbitmicro.com/products/accessories/cpu%20fans/E2U-K65CS-01.htm</a>

Now I'm running @ 43C (109F) per CPU and the temp. won't climb another
10-15C under load like the previous fans.

Thought everyone might like this info.

Sure, I have other issues (chasis airflow / etc) keeping me from
reaching the high 30C mark, but low 40's is much better than low 60's!!

Cheers!

DS


Rob Stow wrote:
 > Diatonic wrote:
  > > What is the typical heat these processors should be running at?
I'm
  > > running the s2882 board in a 2U case - pulling air from the front
and
  > > pushing it out the back. I'm using these fans for the CPU's -
  > >
  > >
<a style='text-decoration: underline;' href="http://www.orbitmicro.com/products/accessories/cpu%20fans/DC1U-B04.htm" target="_blank">http://www.orbitmicro.com/products/accessories/cpu%20fans/DC1U-B04.htm</a>
  > >
  > > These fans pull air off of the top of the heatsink and tunnel it
  > > towards the back of the case.
  > >
  > > I also have a 4U unit, same setup - except I'm using stock AMD box
  > > fans. The 4U is running 20C cooler though!
  > >
  > > What are other people seeing for temperatures on the 246 (or other
240
  > > series) Opterons? I've read all of the AMD forum postings about
temps
  > > but would like more info. Thanks.
  > >
 >
 > I've built 7 systems around the S2885 so far. One
 > used 240's, two used 250's, and four used 246's.
 > Two more are pending and it looks like I will be giving
 > the HE versions of the 246 a try.
 >
 > They have all been workstations in tower cases - and
 > hence there will be tower case vs rack mount case air
 > flow and cooling differences.
 >
 > Typical temps for a 246 using the stock AMD coolers are
 > idle = 39'C
 > load = 52'C
 >
 > The most likely reason your 2U unit is running so much hotter
 > than the 4U unit is simply better airflow through the roomier
 > 4U case. As well, in racks it is quite common for units
 > higher up in the rack to run significantly hotter than units
 > lower down for the simple reason that warm air rises. In a
 > server room that is nominally at 20'C, it is not unusual for air
 > at the floor to be 8'C cooler than air at rack-top level.
 > Ceiling fans to circulate the air in the room can help the units
 > higher up in the rack to run a little cooler.<!-- ~MESSAGE_AFTER~ -->
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