[Beowulf] AMD Roadrunner open compute motherboard

Greg Lindahl lindahl at pbm.com
Fri Jan 18 22:03:07 PST 2013

On Fri, Jan 18, 2013 at 03:00:11PM -0500, Mark Hahn wrote:
> > As in contradiction to what Mark Hahn says - it needs active cooling.
> if anyone cares: a dimm dissipates roughly 2W, depending on generation,
> whether it's LV, number of devices, etc.  one of those duplex 14krpm fans 
> is typically rated at about 12W.

Every time I've tried to load systems up with RAM and measure an
increase in power consumption, I haven't been able increase it.  And I
tried a variety of intense memory access patterns. Maybe someone else
has done this experiment and gotten different results?

> so even a 1W device needs some airflow, but it's mostly CPUs that count.


-- greg

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