Asus A7V + T-bird 750 temperature readings

[TheFrog]

I'm experiencing some CPU temperature oddities with my Tbird 750 (non-overclocked) / Asus A7V board / Titan chrome orb fan (see bottom for full configuration). Idling with an open case, the BIOS reports a CPU temperature of 53 degrees Celsius with a 33 degrees mobo and the fan at 10000 rpm (add 6 degrees celsius with closed case).

When I first installed Asus probe I got a "The CPU setting is not provided by the CPU. The CPU setting is the result of your jumper settings see CPU type for actual CPU information" message even though I was in jumperless mode.

At one point I got a nice Win 98 blue screen when trying to burn a CD-RW and Win simply won't run anymore (it crashes when trying to access user.exe).

I took the whole unit back to the shop and they tried changing just about everything in font of me : new CPU, new fan, new Asus mobo without a change. When they tried a MSI mobo, the reading came down to 43 degrees and 33 degrees respectively. In both cases the CPU appeared to be the same temp to the touch.

Has anybody experienced similar problems ? If so, is the cause of the high temperature reading simply a BIOS issue or does it really overheat ?

TIA,

TheFrog

Full config :
[AMB Tbird 750] [Asus A7V rev 1.02 BIOS 1003] [Titan Chrome Orb] [Asus 6800 Deluxe] [SB live value] [Win 98 SE] [128 Mb PC133 SDRAM] [IBM 30 Gb ATA 100 HD] [Plextor 40max CD drive] [Plextor 12/4/32 CD writer] [Tekram 690U SCSI controller] [D-Link 10/100 adapter] [full tower, 300 W]

 

[DaddyG]

Frog,
You have 1.02 A7V which places the thermistor under the cpu. Previous version 1.02 had the thermistor as a probe to be inserted next to the die or on the heatsink. BIOS 1004a will recalc your temps. BTW ORBS of any kind are not the greatest, try the TAISOL CEK733092, good for over 1gig, cheap and AMD approved.

 

[icculus]

If you have the temp sensor on board (not the probe which I prefer) then snag bios version 1004a. Not only will report a higher temp but it also raises the upper threshold. Asus probe should automatically jump up to 80C as your warning level (I guess it pulls the ranges from bios). There is also a newer version of probe than the one that ships with the A7V. 1004a kind of bothers me in that it reports higher temps. I was alarmed to find my cpu running something like 10C hotter than it was before the bios update - then I realized that it was just the bios compensating for the new thermal sensors which are well off die. I'd be interested in hearing if anyone knows EXACTLY what math the new bios does to the temp before it reports it.

53 is also not too bad. Especially if you have a chrome orb. According to asus probe, my temp is 48C when idle (800 tbird @900 using stock voltage). I believe it is even lower than this considering my sensor is touching the edge of the die and bios is compensating for a well off-die sensor. AMD Specs these chips up to 80C. As I have posted before, it's not a good idea to run that hot.. in fact, I'd probably back off if I was around 60C (or if probe reported 65-67C or so)

When I got my A7V it came stock with something like 1.79V in the core. Thats a touch higher than the normal. I would imagine asus is doing this to enhance stability but it will also generate more heat on the chip. I was able to lower the core voltage down a couple of notches (I want to say 1.65?) and still have complete stability at stock speed with lower temps. The voltage makes a huge difference in temperature.

I really like the A7V board but I *slightly* dislike the temp reporting. You could always pick up an external sensor device if you need a more accurate reading.

 

[Animefreak]

i've already posted some info about temperature readings with A7V and the bios. I used an calibrated external temperature monitor with a sticky thermocouple. With my rev 1.01 A7V, the temperatures are always 10C higher than what i'm reading. Bios 1003 gave me an idling temp of about 32 when the probe was reading 42. Bios 1004a(not final) gave me an idling temp of 40 when the probe was reading 50. By changing the bios only the temperature went up...i think it's supplying more power to the cpu.