Date: Tue, 17 Jan 2006 22:25:06 +0100 From: Daniel Rock <freebsd@deadcafe.de> To: freebsd-amd64@freebsd.org Subject: Re: Opteron 100 Mainboard Recommendation Message-ID: <43CD60B2.2030905@deadcafe.de> In-Reply-To: <20060116153827.69bc236a.kgunders@teamcool.net> References: <20060116015050.360581ff.kgunders@teamcool.net> <43CB6C53.3070407@rogers.com> <003d01c61a85$1ecb4b90$b3db87d4@multiplay.co.uk> <20060116084935.3881e5ce.kgunders@teamcool.net> <00b001c61ab6$3d343700$b3db87d4@multiplay.co.uk> <43CBE456.2060206@deadcafe.de> <20060116153827.69bc236a.kgunders@teamcool.net>
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Ken Gunderson schrieb: > On Mon, 2006-01-16 at 19:22 +0100, Daniel Rock wrote: >> I bought mine in September (S2865AG2NRF) together with an X2 4400+ and 2GB RAM >> (2x1 GB, ECC, DDR400 3-3-3). Didn't have a problem yet. Idle CPU temperature >> ~50°C (in BIOS HW-Monitor, so not really idle). > > This is with the latest BIOS, I presume? The machines I was referencing > are on the initial release, running Opteron 165's and reporting low 60 > degrees C shortly after start up and booting straight into BIOS. This > in their 1U barebones system B2865. Only 1-2 degrees less in a > workstation w/well cooled case though. Well, I started with BIOS revision V2.01. The board was factory shipped with rev. V1.00 (with no Dual Core support). The system was running with V2.01 for over 2 months with no problems. >> V3.01 >> . Adjusted CPU temperature readings > > Yeah- it's now on my to-do list. The upgraded BIOS didn't _exist_ when > I first reported the issue to Tyan though. Their response was that > their thermal testing had indicated sufficient head room. I assumed > that they'd let me know if they came out w/update since I'd reported the > issue (guess we all know what they say about "assume"...). > > It will be intersting to see how "corrected" they are. The Opteron 165 > is dual core at 1.8GHz. The system on deck to be built will be an > Opteron 180 at 2.4GHz, so I think I am justifiably concerned about the > heat. Hopefully the numbers will be significantly lower w/updated BIOS. The BIOS update doesn't make the CPUs run any cooler. Just the temperature readings will be adjusted. The output of the internal thermal diode on-die varies. Therefor you (or the BIOS programmer) should recalibrate the temperature readings by adding or substracting a diode offset. http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26094.PDF Section 3.6.19 Daniel
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