Re: [Beowulf] 96 cores in silent and small enclosure

2010-04-11 Thread Lux, Jim (337C)
On 4/11/10 7:59 PM, "Mark Hahn" wrote: > >> * How high cpu temperatures are acceptable (our cluster is built on 6 core >> AMD opterons)? > > well, you can look up the max operating spec for your particular chips. > for instance, http://products.amd.com/en-us/OpteronCPUResult.aspx > shows that

Re: [Beowulf] 96 cores in silent and small enclosure

2010-04-11 Thread Mark Hahn
Have done some preliminary tests on the system. Indicates a CPU temperature of 60-65 C after half an hour (will do longer test soon). Have a few that's pretty hot. some servers will shutdown at 65 (our DL145g2's, for instance). of course, the metric is poorly defined: is that a thermister und

Re: [Beowulf] 96 cores in silent and small enclosure

2010-04-11 Thread Lux, Jim (337C)
* There are two fans in the system, noctua NF-P14 FLX www.noctua.at/main.php?show=productview&products_id=33&lng=en&set=1 according to the specifications their acoustical noise is 19.6 dB. Are there some simple guidelines of how the noise "adds up", i.e. what would be the sound level of two fa

Re: [Beowulf] 96 cores in silent and small enclosure

2010-04-11 Thread Jon Tegner
Have done some preliminary tests on the system. Indicates a CPU temperature of 60-65 C after half an hour (will do longer test soon). Have a few questions: * How high cpu temperatures are acceptable (our cluster is built on 6 core AMD opterons)? I know life span is reduced if temperature is hi