CPU sensors going mad (I think?) Help!

[ArelSickler]

Alright to start out I'd like to say I don't post here much but I read through a lot of threads and are a generally knowledgeable individual when it comes to computers.

Here's my specs.

Motherboard- Gigabyte 990fx Ud3
CPU- AMD-FX 6300
GPU-MSI 7850 Twin Frozr
Case-Raidmax Smilodon (Modified, total of 8 case fans, 3 80mm, 5 120mm)
Heatsink- Coolermaster Hyper 212+, replaced the stock CPU fan with 2 Coolermaster Sickleflow's in a push pull configuration.
PSU-Corsair 80 plus gold 850w
Hard Drive- Western digital blue 1tb 7200 RPM


I built this computer myself.

Alright so here's my problem, I built this computer about 6 months ago, I tinker with it all the time, overclocking etc. Today I received my two coolermaster Sickleflow's I mentioned in my specs and eagerly installed them in a push/pull configuration. My PWM controlling CPU fan header is 4 pin and these are 3 pin, but I was kinda like "what the hell" and plugged them in anyways, they work fine, I'll be getting a fan controller soon anyways.

Here's the problem, after installing the fans, I went into BIOS, and my CPU temperatures are SUPER high, I mean talking 90c high, and this is from cold boot, so as soon as I see that, I shut my computer down really quick and give it a minute to cool down. I boot the computer up again and go into windows only to find that Speedfan is reporting the same high temperatures (this time in the 70's). Wondering why my CPU was getting that hot, I shut it back down and took off my heatsink, cleaned the die and the contact of the heatsink with alcohol and reapplied new thermal paste, and carefully remounted it, I go back to my BIOS, no dice, still reporting the same scary temperatures.

When I stick my fan inside the case or near the heatsink the ambient air feels cool, and when I stick my hand over my exhaust fans, the air being ejected also feels cool.

Could this be a faulty temperature sensor, or should I be worried? I should also note the computer itself is acting completely okay, no glitches or bugginess, no thermal shutdown etc, just those scary temperatures.

Any help would be appreciated.

 

[24601]

Alright to start out I'd like to say I don't post here much but I read through a lot of threads and are a generally knowledgeable individual when it comes to computers.

Here's my specs.

Motherboard- Gigabyte 990fx Ud3
CPU- AMD-FX 6300
GPU-MSI 7850 Twin Frozr
Case-Raidmax Smilodon (Modified, total of 8 case fans, 3 80mm, 5 120mm)
Heatsink- Coolermaster Hyper 212+, replaced the stock CPU fan with 2 Coolermaster Sickleflow's in a push pull configuration.
PSU-Corsair 80 plus gold 850w
Hard Drive- Western digital blue 1tb 7200 RPM


I built this computer myself.

Alright so here's my problem, I built this computer about 6 months ago, I tinker with it all the time, overclocking etc. Today I received my two coolermaster Sickleflow's I mentioned in my specs and eagerly installed them in a push/pull configuration. My PWM controlling CPU fan header is 4 pin and these are 3 pin, but I was kinda like "what the hell" and plugged them in anyways, they work fine, I'll be getting a fan controller soon anyways.

Here's the problem, after installing the fans, I went into BIOS, and my CPU temperatures are SUPER high, I mean talking 90c high, and this is from cold boot, so as soon as I see that, I shut my computer down really quick and give it a minute to cool down. I boot the computer up again and go into windows only to find that Speedfan is reporting the same high temperatures (this time in the 70's). Wondering why my CPU was getting that hot, I shut it back down and took off my heatsink, cleaned the die and the contact of the heatsink with alcohol and reapplied new thermal paste, and carefully remounted it, I go back to my BIOS, no dice, still reporting the same scary temperatures.

When I stick my fan inside the case or near the heatsink the ambient air feels cool, and when I stick my hand over my exhaust fans, the air being ejected also feels cool.

Could this be a faulty temperature sensor, or should I be worried? I should also note the computer itself is acting completely okay, no glitches or bugginess, no thermal shutdown etc, just those scary temperatures.

Any help would be appreciated.

The Coolermaster Hyper 212+ is a terrible cooler in terms of total rated TDP.

The 6300 also lies in it's official TDP as well.

You got a perfect storm of badness when you add those two things together.

Go slap the person who recommended you that cooler for that chip.

By the way, the temperature sensor in the AMD FX Bulldozer and Piledriver chips lie as well, so you really have no clue if it's overheating or not, lulz.

There's no thermal shutdown because the Bulldozer and Piledriver chips have no official TJmax, so they just burn until they crash.

 

[ArelSickler]

I should also note when I noticed the problem I immediately dropped frequencies back down to stock, the OC was 4400 core, 208 BCLK and a negligible OC to the HT link, voltages were adjusted very minimally since not much was necessary. This OC was stable for over 2 months, initial testing with Prime 95 for 7 hours, max CPU temp then was 54. Also, I just checked core temp and it's reporting normal temperatures (29C idle for me), but reports maximum temperature during recording as 265C (lol?)

 

[24601]

I should also note when I noticed the problem I immediately dropped frequencies back down to stock, the OC was 4400 core, 208 BCLK and a negligible OC to the HT link, voltages were adjusted very minimally since not much was necessary. This OC was stable for over 2 months, initial testing with Prime 95 for 7 hours, max CPU temp then was 54. Also, I just checked core temp and it's reporting normal temperatures (29C idle for me), but reports maximum temperature during recording as 265C (lol?)

You'll have to divine the real TJmax yourself, lol.

AMD suggests not going over 62c, and that's really all the community has as guidance.

Do keep in mind that the temperature sensor on the Bulldozer and Piledriver chips lie..... alot. Users show chips idling at below ambient temperatures on most good cooling setups.

AMD has transcended the laws of thermodynamics .

 

[ArelSickler]

The Coolermaster Hyper 212+ is a terrible cooler in terms of total rated TDP.

The 6300 also lies in it's official TDP as well.

You got a perfect storm of badness when you add those two things together.

Go slap the person who recommended you that cooler for that chip.

By the way, the temperature sensor in the AMD FX Bulldozer and Piledriver chips lie as well, so you really have no clue if it's overheating or not, lulz.

There's no thermal shutdown because the Bulldozer and Piledriver chips have no official TJmax, so they just burn until they crash.

Seemed to do fine before considering my max temperature after 7 hours of prime95 was 54 and idled at basically ambient, but the point of this thread wasn't to argue what/who's hardware is the best, I know this is a budget build. The point was to perhaps gather some speculation as to what could have caused this sort of error.

 

[ArelSickler]

And yeah I know, it would be real nice is AMD would give us a real temperature sensor for once, kind of ridiculous.

 

[24601]

The only suggestion I can make is that if it doesn't crash or error out in any of your tests, that's as good as you can actually test it.

There isn't actually anything more that you can do really.

 

[ArelSickler]

Do you think somehow plugging a 3 pin fan into the 4 pin CPU fan header could have somehow caused this issue? Like I said, all I did before this issue started happening is swapped the fans. And these are much stronger fans than the stock HSF.

 

[24601]

Do you think somehow plugging a 3 pin fan into the 4 pin CPU fan header could have somehow caused this issue? Like I said, all I did before this issue started happening is swapped the fans. And these are much stronger fans than the stock HSF.

No, 3 pin works fine in 4 pin. That's what I'm doing on my current cpu as well.

http://www.tomshardware.com/forum/311884-28-connecter-help

 

[ArelSickler]

No, 3 pin works fine in 4 pin. That's what I'm doing on my current cpu as well.

http://www.tomshardware.com/forum/311884-28-connecter-help

Yeah I know it works technically but perhaps part of AMD's temperature calculating algorithm is to measure the fan's PWM, and if the fourth pin is the PWM header than the board would read that value as '0', so maybe that would send the temperature readings flying off the chart. Idk, I guess I am going to go have to pick up a temperature reading laser to get to the bottom of this.

 

[Soulkeeper]

any reason you chose the Sickleflow fans over pwm fans ?

I just picked up a dual pack of corsair SP120 "high performance" the other day, and am pretty happy with them so far.
They can be adjusted between ~600-2250rpm with pwm

3 pin fans are a thing of the past imo, I'd recommend exchanging if it's not too much hassle.

Also as others above have mentioned I too get the "below ambient" readings on AMD chips, I add 20c to any fan controll software to compensate.

 

[Soulkeeper]

Yeah I know it works technically but perhaps part of AMD's temperature calculating algorithm is to measure the fan's PWM, and if the fourth pin is the PWM header than the board would read that value as '0', so maybe that would send the temperature readings flying off the chart. Idk, I guess I am going to go have to pick up a temperature reading laser to get to the bottom of this.

the PWM pin is output only at 25KHz
On my board the PWM pin is disabled unless current draw is detected at the +/- pins, yet the RPM still functions ...
I found this out when I tried to drive 2 fans from the same PWM but use a molex for power.

 

[sm625]

A
Here's the problem, after installing the fans, I went into BIOS, and my CPU temperatures are SUPER high, I mean talking 90c high,

It is highly unlikely that your cpu is actually that hot. Most modern cpus can power up and enter the bios and run for a few minutes before even breaking 60C without any hsf installed.

 

[Soulkeeper]

here are some interesting reads on what AMD's "temperature" readings actually mean

https://www.kernel.org/doc/Documentation/hwmon/k10temp
http://yeupou.wordpress.com/2012/02/18/getting-accurate-temperature-reading-for-the-cpu/

 

[ArelSickler]

any reason you chose the Sickleflow fans over pwm fans ?

I just picked up a dual pack of corsair SP120 "high performance" the other day, and am pretty happy with them so far.
They can be adjusted between ~600-2250rpm with pwm

3 pin fans are a thing of the past imo, I'd recommend exchanging if it's not too much hassle.

Also as others above have mentioned I too get the "below ambient" readings on AMD chips, I add 20c to any fan controll software to compensate.

It went with the theme of my case etc, and I'll be picking up a fan controller to go in the drive bay soon here, so I'll just splice the 3 pin into blank molex adapters and plug them in there, I couldn't find any PWM fans with the look I was looking for, and it will only be a temporary issue. Before this happened I also got below ambient temperature readings.

 

[ArelSickler]

here are some interesting reads on what AMD's "temperature" readings actually mean

https://www.kernel.org/doc/Documentation/hwmon/k10temp
http://yeupou.wordpress.com/2012/02/18/getting-accurate-temperature-reading-for-the-cpu/

That is actually pretty interesting, so that being the case perhaps these fans do have something to do with the temperatures being so off the wall, also being that they are the only variable that has changed since before when the temperatures seemed fine.

Do you guys know of anything I can do to monitor the real physical temperatures constantly that won't cost me an arm and a leg? The laser temperature reader would work but I need something that is always taking temperatures and reporting them. I'm tired of playing AMD's bullshit on the temperature sensor thing.

 

[Soulkeeper]

Seems silly to ask, but have you actually verified that the fans are spinning by taking the side of the case off ?

what rpm do they spin at ?

 

[nurturedhate]

Have you put the original fan back on to see if the issue corrects itself?

 

[tweakboy]

Get a iCage .... cheap and endorsed by me.