updating Bios changes temperatures.

[dhester]

I have an i5-3570k in a gigabyte ga-z77-d3h motherboard, when I updated the bios from version F12 to F13 my maximum temperature running the prime95 test in realtemp dropped by 20C.

It was running at a maximum temp of 102c now max temp is 84c on one core and 80c, 81c and 83c on the others.

I think the temperatures are high and am looking at alternatives for the stock cooler that I am at present using.

 

[RJC]

It could be the case the CPU is throttling more aggressively with the new BIOS, I would double check the stock cooler is mounted properly first.

 

[dhester]

I have checked the stock cooler and it is located securely. I did have problems with the motherboard and had to exchange it, the store I purchased the motherboard from swapped the chip over and I am not sure they seated it properly so I am going to get some new thermal paste and cleaner and resit the stock cooler, if this does not cool the chip sufficiently I will get a different cooler.

I have done nothing apart from updating the bios so can't see why this makes so much difference to the temperature.

 

[JonSmith]

It's possible there was a bug with the BIOS temperature readings. Recently I had this issue with an AM2+ motherboard, updating the BIOS reduced the apparent CPU temperatures. I think it can happen because the temperature sensor on the processor gives a raw analogue output which is then interpreted by the motherboard and passed to the OS.

Also, sometimes there are issues with the smart fan function which result in the cpu fan speed being too low. There are all manner of things that can be fixed in BIOS updates.

 

[Jokester]

What are you using to read temperatures?

 

[dhester]

I am using realtemp to read the temperature. I have also used core temp with much the same results.

 

[Jokester]

I can only assume Jon is right about the fan profile being changed.