Troubles with CPU Fan Speed

desktop, cpu - nuvoton nct6776f, gpu - ati video card, psu 450W (?), no overlocking. computer is about 4 years old or so. that's about all I know. if you require anymore information i'll try my best to find it out.

Cleaned my pc out roughly a week ago after my computer kept overheating. I also noticed that the thermal paste was dried up so I cleaned it and reapplied a few days ago. It's gotten a little better but when my computer is idle it gets up to 77 ~ 85 but when I'm playing video games that increase my CPU usage quite a bit the temperature goes down to about 50 ~ 60

Did you try it with the cover off and are the fans spinning normally? At 4 years they may need replacing as these do fail over the years.
Bob

I have the cover off at the moment and the fans are running fine. It just doesn't run that fast according to SpeedFan. It's running at 1380 ~ 1500 ish with the temperature jumping from 60ish but mainly staying in the 80s

Replace the fan on the CPU/GPU that is getting hot.

How much would a decent fan cost? Perhaps give me some recommendations as I don't know anything about computer parts

I've seen fan costs all over the map. It may be cheap in say San Francisco to exorbitant in the Antarctic. I can't guess the costs but given the story it's sounding grim unless the heatsink work was not done well. That is I've seen such and the heatsink wasn't in full contact causing a lot of pain for the owner.

Parts can fail like this and the cost at the shop counter may be greater than a replacement.
Bob

I'll try and search for a good replacement for my fan and perhaps I will reapply the thermal paste in case that was the problem. Cheers

It's the heatsink work they often can't quite nail.

https://www.google.com/#q=intel+heatsink+has+a+tendency+to+pop+off finds prior discussions on that.

The mating surfaces must be in good contact and the more of these you do the more you know of that good feel as it comes down and you give it a slight twist.

I don't see any notes here about any BIOS tweaking or such but the high temps are a sign.

On a lark, did you ever run TORRENTS? Here's why: https://www.google.com/#q=utorrent+bitcoin+miner

Bob

My friend told me about how it could be bitcoin miners that are running when my computer is idle and told me to download MalwareBytes to scan my computer. I installed it recently and scanned my computer and there were a handful of files that got removed but the situation didn't improve. I believe it could be just that the heatsink does not have firm contact with the cpu and so its not cooling down that much. I'll try and push the heatsink more in and see if it will help out.

I realize not everyone has that and generally most other cleaning does the job. i do find though, when i do take "my time" to clean, the results can be very different. I have blown out PSUs and these still reeked of dirt and that more powerful compressed air, gets dirt coatings off as well. If the problem remains after all that, then either a fan just isn't cutting it or bad then I'm able to locate the possible cause. i found the PSU fan itself bad. it just was stuck or failed and that is usually 1/2 of basic cooling for most PCs. The other being the cpu and gpu fans or heatsink combo. let's not forget any possible vent clogs at frt. behind the frt. panel/cover. Worse, if filtered or possible dirt clogs again. Within reason, leaving nothing to chance and blow out all areas and touching all cooling methods, etc.. good luck

tada -----Willy