Some fake SMCs cause kp. Some have the sensors already inside the fake SMC and that will often cause kp, especially if you then try to run more sensor kexts outside of the fake SMC.
So far the kozlek ones here (maybe 10 pages or so back) work best for me. I finally get GPU temps.
For me, some of the HWmon softwares really messed with my fans but I think the latest versions work better. The istats seem to work best.
Figure out what's important for you.
GPU temps aren't as big a deal as CPU temps, or system stability.
In fact GPU temps are completely irrelevant given that we can't o/c them on this platform anyway (except bios modding of course).
If you're using kexts that mess with your fans then you will stuff your card so you should probably not use those kexts. In my opinion.
Find the kozlek kexts 10 pages back and if they don't work don't use sensors. Intel power gadget is fine.
Do use the kozlek fake SMC that's with the sensor kexts.
Hope this helps
edit: heres a direct link to the kexts
https://github.com/kozlek/HWSensors