To The People with Socket-A Chips and External Thermistors

[Mikewarrior2]

Hey Everybody(specifically those in the message title ),

Just trying to get what kind of differences you guys are getting between the mb readings and external readings.

And if you can, please post your MB, Bios revision, and ambient temp.


Many thanks in advance,
Mike

 

[Poof]

Mike - I gave a bit more info in case it might have some bearing on the readings...

Mobo = MSI K7T Pro2-A (gotta get you the BIOS rev. later... am at work )
CPU = Duron 700 (week 45)
HS/FAN = GlobalWin FOP32-1 w/arctic silver
FSB = 106
Multiplier = 9
Vcore = 1.800V
Ambient = 18C (from RS internal/external therm. in room and the system is completely caseless)
CPU BIOS reading @ambient = 27C
"CompuNurse" external probe on CPU @ambient = 34C
CPU BIOS reading @full load = 37C
"CompuNurse" external probe on CPU @full load = 43C

(Full load = RC5)

 

[Mikewarrior2]

Cool, so like a 6-7C variance.

Thanks, and keep them coming(if there are any ).


Mike

 

[Buddabudda]

phew, that 6-7 variance is reassuring. Was afraid that MSI was underreporting that temp by lot more. Why do you think that manufacturers under report temps instead of erroring on the side of caution? Seems like MSI should up their bios temps by 10C if the 6-7 variance holds true.

 

[Mikewarrior2]

It might work for poof's case, but her duron is around 954mhz. Not terribly hot.

I got one this weekend for a t-bird at 1375, and the reading was 6-7 Higher than the compensated KT7A bios. So, un-compensated readings would have been a 16-17C difference between the two spots.


Mike

 

[Poof]

Mike - that's why I added in the processor and overclock info. I would think that if one OCs the FSB and not just the multiplier, then that would affect the case temp a bit, eg., warmer North/Southbridge, etc. (although in my case, the mobo isn't in a case... ).

(and Mike... /me is a lady... )

 

[Mikewarrior2]

I appreciate you posting that..


Above post modified


Mike

 

[Poof]

LOL Mike!

And thanks for all the good info!

 

[Technonut]

I sold my Digital Doc3, so I could purchase the newer version that supports 120mm fans, and allows a hard drive to be installed in it I do have a couple of of other probes around, and just received a Hedgehog to test against my Alpha 6035. I will throw a probe on it, and post the differences for you later.

 

[Mikewarrior2]

Thanks Technonut!


Mike

 

[Poof]

^bump^

BTW Mike - wasn't sure what the BIOS rev. info was on that MSI mobo other than the Award BIOS "1.01A" designation that comes up at boot...

 

[Technonut]

Well Mike, you may find this interesting, I know that I did.

The Hedgehog that I purchased from a forum member, arrived nicely boxed, and in excellent shape. The quality seemed to be of the "cherry picked" variety, with the pins tightly seated, and a smooth bottomed lapping job that I checked with a straight edge, and was perfectly flat. I applied a thin layer of Arctic Silver to the core of my 1100 @ an 800 multiplier/146 FSB. My only complaint is that the clip is not as user friendly as the Alpha, and has no way to rest your thumbs on the sides of the bottom of the clip to push it over the bottom loop socket catch as the Alpha clip does. It also took more force to get it there.

I carefully attached a Compu Nurse probe touching the side of the core before installation, and checked it twice to ensure good positioning. I placed another Compu Nurse in the case to measure case temps. I also made sure that the probe in the socket had a dab of AS on it, and was touching the bottom of the processor.

KT7A RAID BIOS WZ.b03
Hedgehog with Delta Black Label 38CFM fan

When system was first started in Windows:

Internal Case Temp (Probe)=22.5 C
Internal Case Temp (VHM)= 21 C

Core Temp with 7 startup programs running (Probe)= 26 C
Core Temp with 7 startup programs running (VHM) = 26 C

Started Prime95 Torture Test with all background programs running:

After 15 minutes:

Internal Case Temp (Probe)= 22.5 C
Internal Case Temp (VHM) = 21 C

Core Temp (Probe)= 36.2 C
Core Temp (VHM) = 36 C

Prime95 & background programs running with 3 Loops of 3DMark2000 Demo:

Internal Case Temp (Probe)= 22.7 C
Internal Case Temp (VHM) = 21 C

Core Temp (Probe)= 37 C
Core Temp (VHM) = 36 (Checking after quick shut down od 3DMark loops)

UT & Prime95 with all background programs except PCcillin running:

2 Teams of 8 Bots, 300 frags + or - each:

Internal Case Temp (Probe) 23.2 C
Highest Core temp (Probe)= 37 C

Shut Down, went into BIOS Health Monitor, and waited 10 Minutes:

BIOS Core Temp: 35 C
Probe Temp: 34.7

BIOS System Temp: 22 C
Probe Temp: 22.9 C

Soft Menu Voltage set and running fine at default:

Core: 1.75V
I/O: 3.40

BIOS Health Monitor Voltage:

Core: 1.79V
3.3V: 3.47
5V: 5.02
12V: 12.18

The Hedgehog seems to be one hell of a cooler. Perhaps it is because I am able to run stable at low core & I/O voltage. I did check the core placement of the probe one more time to make sure it was still in place, and it was. It seems the core temp is somewhere between 12-15 deg. C above internal case temps. Even if it is off by a small margin, still one hell of a cooler, and will be taking the place of my Alpha.

 

[Mikewarrior2]

Technonut,

Thanks... I have a new area where the +10 compensation works great, with Hedgehog/1.1ghz range.

Thanks for taking the time to run all of that... oen question, did you notice any change between the two readings with the alpha?


Mike
(P.S. Still looks like a 10C drop from side to measured spot-compensation).

 

[Balael]

Heya, all temp readings done with thermistor touched the edge of the core.

Duron 600 on KT7A with fop-38 with thermal pad.
Testing done at 150 x 7, 1050 @ 1.8v.

Ambient temp is 21C

Idle temp.

Mobo monitor 36
Thermistor 36.6

Under load.

Mobo monitor 39
Thermistor 39.6

Load was done using cpu stability test, cpu warming option for 10 minutes, could do more, but i don't think it'd get much hotter, and i think the temps would raise in par with each other. Hope this helps out.