kernel_task process and fan go crazy after replacing HDD with new SSD
I've just replaced the existing HDD (Samsung 1TB) with a SSD (Crucial MX100 512GB). At the same time, I've also boosted the memory going from 8 to 16GB. I also replaced the stickers around with the iFixit kit. Everything when fine, even though it was not easy work.
On the first start, everything worked perfectly. RAM was recognized and SSD too. But after a couple of minutes, the fan started to go crazy and I honestly didn't feel a great change in the way the iMac was performing. It did boot quicker though, but that's mainly the only big difference.
I've installed TG Pro to calm things down. The CPU temperature is not higher than 40°C and also the SSD drive (via SMART) announce a small 31°C. Everything is below 40°C in fact, manually setting the fan speed to 2000 rpm.
At the same time, I see that kernel_task process is using around 70% of CPU load. I've read that it could be related to the fact the SSD drive is not "official" and not managed (temperature wise) correctly.
How can I correct this ? Any idea ?
Thanks in advance.
Is this a good question?