What is the Tjmax of the FX-4300?

[gustavo.mazuco]

Hey, everyone! I had an FX-4300 around and i chose to build a system with it. I went on to stress test it but i saw that the temperature readings were weird and wrong everywhere. HWmonitor shows it at 30C at load and 12C at idle, which is impossible with air cooling. There is also another "CPU" temperature reading on HWmonitor that reads 42C at load with prime95 but i don't know if that's right. I asked around and people told me that FX CPUs get wrong readings for some reason and the only way to get the right readings would be to use AMD overdrive and see the thermal margin it displays. Apparently, the way to see the right temperature is the tjmax of the CPU minus the thermal margin, but i don't know my CPU's tjmax. I downloaded Coretemp and it shows tjmax as 90C and, since my thermal margin shows as 38C on Overdrive, my temperature would be 52C? I'm not sure. Can someone help me out?

 

[Gam3r01]

Thats not how AMD OD works.
The number displayed in the application under thermal margin is the distance to thermal maximum.
If the number is positive, youre golden, if its zero, youre at max temp, if its negative, youre over the recommended operating temps.
http://www.tomshardware.com/faq/id-2122665/understanding-temperature-amd-cpus-apus.html

What does the thermal margin read under load (prime95)? Cooler?

 

[gustavo.mazuco]

Thats not how AMD OD works.
The number displayed in the application under thermal margin is the distance to thermal maximum.
If the number is positive, youre golden, if its zero, youre at max temp, if its negative, youre over the recommended operating temps.
http://www.tomshardware.com/faq/id-2122665/understanding-temperature-amd-cpus-apus.html

What does the thermal margin read under load (prime95)? Cooler?

Under load it reads 38C. I got scared because i didn't know exactly what to do of it. I'm using an coolermaster hyper t4. i know the number is the distance to the thermal maximum. what i want to know is what that thermal maximum number is.

 

[Gam3r01]

Thats pretty decent then.

 

[Karadjgne]

afaik, the TjMax for all FX Cpus is 62°C. But thats kinda hokey since the cores don't have thermal strips the way Intel does, so getting exact core temps is not really feasible. I usually go by package temps which usually run @10° hotter

 

[gustavo.mazuco]

Thats pretty decent then.

Really?! Are you sure?

The thing is, i read that the tjmax is not something like 60C. i think it's somewhere around 70-100C. so, if it were to be 100C and my thermal margin being 38C: 100-38=62. My CPU would be running at 62 which is kinda high. That's why i wanted to know the tjmax for this CPU so i could get the right temperature readings.

 

[gustavo.mazuco]

afaik, the TjMax for all FX Cpus is 62°C. But thats kinda hokey since the cores don't have thermal strips the way Intel does, so getting exact core temps is not really feasible. I usually go by package temps which usually run @10° hotter

Yeah, i read that but if the tjmax is 62c then the thermal margin wouldn't make sense. the thermal margin is the distance from the temperature from the tjmax, right? so if the tjmax is 62 and my thermal margin is 38: 62-38=24? my cpu temperature is 24c? that doesnt sound right.. My package temps are reading wrong too. it reads 12C.

 

[Karadjgne]

According to Asus suite, Hwmonitor, speccy, SpeedFan my psu has a 12v rail voltage of 8.2v. My Seasonic M12-II 520w, according to my Fluke multimeter has a 12v output of 12.23v at the mobo. Many times you gotta take software with a grain of salt cuz it's wrong.