On Thu, 11 Jan 2007 17:57:38 +0100 Rudolf Marek <r.marek at assembler.cz> wrote: RM> > FWIW, I've opened the box to try to cool the DIMMs a bit and now the RM> > results are RM> > RM> > # ./fbdt RM> > Intel sig at 0: 1d 11 RM> > Current temp is: 65.000000C RM> > Intel sig at 16: 1d 11 RM> > Current temp is: 0.000000C RM> > Intel sig at 32: 1d 11 RM> > Current temp is: 52.000000C RM> > Intel sig at 48: 1d 11 RM> > Current temp is: 54.000000C RM> > RM> > so not only the values did diminish but there is also 54 instead of 0 for RM> > the last one. I think I know at least why the temperature is sometimes 0: it's a timing issue, apparently you can't read the sensors too quickly. If I insert usleep(1000) between access to the signature bytes and the temperature value, I can reliably read non zero values. I also looked at the values of the other registers described in the section 14.5.3 of Intel datasheet, here is the full output: Sig at 0: 1d 11 Device id: 80 04 TEMPLO: 106.00C TEMPMID: 109.00C TEMPHI: 124.00C TEMPSTAT: 0x1 TEMP: 68.50C Sig at 16: 1d 11 Device id: 80 04 TEMPLO: 106.00C TEMPMID: 109.00C TEMPHI: 124.00C TEMPSTAT: 0x1 TEMP: 68.00C Sig at 32: 1d 11 Device id: 80 04 TEMPLO: 106.00C TEMPMID: 109.00C TEMPHI: 124.00C TEMPSTAT: 0x1 TEMP: 59.00C Sig at 48: 1d 11 Device id: 80 04 TEMPLO: 106.00C TEMPMID: 109.00C TEMPHI: 124.00C TEMPSTAT: 0x1 TEMP: 63.50C So, assuming I interpret TEMPLO/MID/HI correctly (I also divided their values by 2 to get the temperature in degrees Celsius), it really does look that these DIMMs are supposed to run quite hot. Please let me know if I'm wrong (before I fry them :-), VZ
