Fx8320 Cpu won't go above 1.3ghz

[prajeshm07]

Hi.
I have Asus M5A78L motherboard and fx 8320 processor with Quadro k2200 ddr5 graphics.

Lately I realised working on after effects that it was very slow,
so I checked my task manager and it said CPU speed of 1.33 GHz and when I checked it in CPU Z it showed the same. While rendering it did not even increased 1% . When I performed CPU Z test stress test it went up to 3.5 GHz.
it's max speed is 3.5 GHz can anyone help me with the problem? Why it is not going above 1.33 GHz for any other application except CPU Z STRESS TEST?

 

[imsqam]

What are your CPU temperatures? CPU's will slow down if they get past the "thermal throttling temperature" so as to lower the temperature and not damage the CPU. If you don't know how to get your temps you can go into the BIOS to see it or download a monitoring program like these
https://www.cpuid.com/softwares/hwmonitor.html
https://www.hwinfo.com/download.php

You want to look at the core temperatures.
http://www.tomshardware.com/answers/id-1716078/maximum-safe-temperatures-8320.html