1 Reply Latest reply on Feb 22, 2016 7:35 PM by techguy

    AMD has updated the later FX CPU max user temps


      After much discussion with AMD Customer Care, AMD has updated the maximum user CPU temps for a number of the later model FX desktop processors that did not have temps listed in their specification box online since they were released for sale.


      Since there can be some confusion over the difference in max user temp between the 125w FX-8000 series which has a 61C limit and the FX-9000 series, 220w CPUs which have a 57C limit, I will address that matter in this post.


      In my experience and that of many other FX-9000 users the FX-9000 series CPUs which are factory overclocked FX-8000 series CPUs, seem to be completely stable at 61C the same as the FX-8000 series CPUs. The reason for the lower 57C temp specified for the FX-9000 series CPUs is to keep the TDP within the AMD specified 220w figure. As a CPU heats up the internal resistance increases and thus more power is required to overcome that resistance. By setting the FX-9000 series CPU temp to 57C the CPU remains inside the 220w TDP listed for those models. Nothing bad will happen if your FX-9000 series CPU runs up to 61C other than it will require more electrical power.



        • Re: AMD has updated the later FX CPU max user temps

          In the original post above I forgot to point out that the temps AMD lists for max user CPU temps is the internal or "core" CPU temp. You need a proper applet to read the AMD CPU core temps properly. The applets "Core Temp", "HWiNFO" and "AIDA64" typically read the AMD FX CPU temps properly in the 60C-70C range according to AMD Engineering. Many applets do not read AMD CPU core temp but instead read CPU socket temp and may list this temp as "CPU Temp" when it is really the hotter CPU socket temp.


          The primary purpose of AMD adding the CPU max user temps is so that people can determine if/when their FX CPU may be running excessively hot as this can cause BSOD, rebooting, and other system errors. With proper CPU cooling you should not be at the max user temp unless your FX CPU is under heavy load such as gaming for some period of time, depending on the ambient room temp.


          ALL AMD boxed CPUs come with a HSF that will properly cool the specific CPU the HSF is included with. In the past some of these fans were quite annoying because they must run at high speed due to their small size, to flow sufficient air to cool the CPU properly. AMD has recently introduced a new premium HSF for folks who desire a more quiet solution in a boxed AMD CPU without the need to purchase an aftermarket HSF. See the link below for a review of AMD's new Wraith cooling fan.


          AMD's Wraith Cooler: A Review - SemiAccurate