1U P4 Systems
Josip Loncaric
josip at icase.edu
Mon May 21 13:53:48 PDT 2001
Steve Gaudet wrote:
>
> Based on the current P4 die won't see the P4 in anything smaller than a 2u.
Except for the P4/1.4 1U RackSaver link posted by Tim... However,
cooling a 1U case concerns me. The RackSaver RS-1100 claims to have 6
small case fans (> 40 cfm total), and a 250W ATX12V power supply. I
understand the need to be space efficient, but I'd feel more confident
about cooling with larger cases...
Sincerely,
Josip
P.S. RackSaver uses P4/1.4 which can dissipate 51.8W. By contrast, the
P4/1.7 can dissipate 64.0W in normal use, i.e. more than a fairly large
soldering iron... BTW, this 64.0W is Intel's "thermal design point" for
the P4/1.7 processor. Their "thermal design point" is based on 75% of
the maximum power dissipation (which could reach 85.3W, lead to internal
hot spots, etc.). Intel claims that most popular applications
(including SPEC benchmarks) fall below this 75%. However, ATLAS and
some other cache optimized codes can seriously stress this
assumption... Excellent cooling is essential when doing very intense
computations.
--
Dr. Josip Loncaric, Research Fellow mailto:josip at icase.edu
ICASE, Mail Stop 132C PGP key at http://www.icase.edu./~josip/
NASA Langley Research Center mailto:j.loncaric at larc.nasa.gov
Hampton, VA 23681-2199, USA Tel. +1 757 864-2192 Fax +1 757 864-6134
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