According to the Intel datasheet for the 533FSB Xeon they say that they have a sensor diode embedded in the processor with two pins available to access it. According to the Supermicro X5DPA-GG documentation they claim to have a sensor chip that can read that, although I don't have the technical documentation to prove that it is indeed a max1617 type chip.. it is likely that whatever I'm reading is hooked up to the internal temperature diode. Steve ------------------------------------------------------------------ Steven C. Timm, Ph.D (630) 840-8525 timm at fnal.gov http://home.fnal.gov/~timm/ Fermilab Computing Division/Core Support Services Dept. Assistant Group Leader, Scientific Computing Support Group Lead of Computing Farms Team On Thu, 29 Jul 2004, Philip Edelbrock wrote: > > That's a good question. It certainly looks as if it is the CPU temp > since it is quite a bit higher than the board temp. Strange that the > two CPU's are so different in temp readings, though. It's also possible > that those readings are actually for something else (like the power supply). > > What I would try is to load the machine and monitor the temperatures. > The board temps should rise slowly, but the CPU temps should rise > quickly. That should give you a easy and definitive answer in just a > minute or so. > > > Phil > > PS- Nice to see our stuff at work at Fermilab! ;') > > -------- Original Message -------- > Date: Thu, 29 Jul 2004 13:27:01 -0500 (CDT) > From: Steven Timm <timm at fnal.gov> > To: frodol at dds.nl, phil at netroedge.com, mdsxyz123 at yahoo.com > Subject: xeontemp vs. adm1021 > Message-ID: <Pine.LNX.4.58.0407291316090.10290 at boxer.fnal.gov> > MIME-Version: 1.0 > Content-Type: TEXT/PLAIN; charset=US-ASCII > X-Quarentine-Loop: Processed > X-Spambayes-Classification: ham; 0.00 > > > Hi Guys.. > > Was reading your documentation at > > http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/doc/chips/xeontemp > > and > > http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/doc/chips/adm1021 > > My hardware, Supermicro X5DPA-GG motherboard, > dual Xeon 2.66GHz 533 FSB chips,512kb L2 cache > and > dual Xeon 3.06GHz 533 FSB chips,512kb L2 cache > > Running kernel 2.4.20-30.7smp from Redhat with > lm_sensors 2.8.3 and i2c 2.8.3 modules loaded over top of it. > > In modules.conf > alias char-major-89 i2c-dev > > sensors-detect finds the following: > MODULE_0=i2c-i801 > MODULE_1=adm1021 > MODULE_2=w83781d > MODULE_3=eeprom > MODULE_4=smbus-arp > > My question is the following: > > The docs on xeontemp which I mention above say that 533 MHz > xeons don't have the external sensor for the die temp. > "unfortunately the 533 MHz FSB Xeons dropped the on-board sensor chip" > > but the adm1021 docs say " If you have a Xeon and the adm1021 > module loads and both temperatures appear valid, then things are good" > > In my case the adm1021 module does load, and I get this: > > > root at fnpc151 root]# sensors > max1617-i2c-0-18 > Adapter: SMBus I801 adapter at 0540 > Algorithm: Non-I2C SMBus adapter > Board: +47C (low = -55C, high = +127C) > CPU: +53C (low = -55C, high = +78C) > > max1617-i2c-0-1a > Adapter: SMBus I801 adapter at 0540 > Algorithm: Non-I2C SMBus adapter > Board: +48C (low = -55C, high = +127C) > CPU: +73C (low = -55C, high = +78C) > > The CPU temperatures go up and down with CPU activity, as > expected. > > My question is--is this "CPU" temperature that I am > reading out the temperature of the die? The vendor > is telling me that it is. The documentation you have > hints that it should be too, but I am just confused by > the statement that 533MHZ FSB chips don't have this sensor. > > At first with lm_sensors 2.6 we did not see the sensor > but once we ran the sensors-detect from lm_sensors 2.8.3 > we could see it just fine and it appears to be functioning. > > Is this sensor the die temperature? > > Thanks for your help. > > Steve Timm > > > > > [root at fnpc151 root]# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 2 > model name : Intel(R) Xeon(TM) CPU 3.06GHz > stepping : 9 > cpu MHz : 3066.856 > cache size : 512 KB > physical id : 0 > siblings : 1 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > bogomips : 6121.06 > > processor : 1 > vendor_id : GenuineIntel > cpu family : 15 > model : 2 > model name : Intel(R) Xeon(TM) CPU 3.06GHz > stepping : 9 > cpu MHz : 3066.856 > cache size : 512 KB > physical id : 0 > siblings : 1 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > bogomips : 6121.06 > > > ------------------------------------------------------------------ > Steven C. Timm, Ph.D (630) 840-8525 timm at fnal.gov > http://home.fnal.gov/~timm/ > Fermilab Computing Division/Core Support Services Dept. > Assistant Group Leader, Scientific Computing Support Group > Lead of Computing Farms Team > >
