CPU still too hot after installing new heatsink and fan

Are you overclocking? Raised the cpu vcore for any reason? What it the ambient temp in the room? I think Dadiggle hit it on the head with the thermal paste though. What brand did you use and did you apply it correctly - thoroughly, drying/curing time and all?

I had this, turned out to be the heat sync was not dead flat on the CPU, with some systems it can be screwed down very slightly off, as mentioned already, you must clean ALL old paste off to a near polish, and use a good paste, but not too thick as this can lead to a nasty gap. Not an expert just from experience

Madbrit thank you so, so much. My old fan was buzzing and slowly dying as it was nearly six years old. I got a new heatsink and fan, installed it and somehow my CPU temperature went up by about 20°C. I just about went crazy trying to figure out what was wrong. Then I searched and found your post and remembered I hadn't screwed the heatsink in as much as I could have when I was trying to put the fan on to ensure the fan fit. I opened up my case, screwed the heatsink in as much as it could go and boom, temperature dropped by about 22°C. Many thanks for your post!

It's been over two years since you made that post but I'm hoping you'll still read this to know how much you helped me out