Dota 2 Stuttering/Lag

[lorbana]

So I have recently bought an used desktop.
Its specs are as follows:

I don't know much about PCs, but I ran it through canyourunit before I bought it and I am pretty sure I can run Dota 2 on this PC. I don't even expect to play on ultra settings or anything, I have all settings on low.
But I am still experiencing stutters/lags during the game. Just randomly, usually when multiple spells are used. I searched around and disabled turbo, but its still happening.

I also noticed that the CPU fan is really loud. It is always at >3000RPM and when I start gaming, it goes to >4500RPM. I did some research on this and apparently the fan that comes with the CPU is just really loud.

My questions are:
1. Why is it stuttering/lagging during the game? How can I fix it?
2. Is there any way I can reduce the CPU fan noise? If changing the fan is the only way, what fan do you recommend (nothing too expensive, I just want to run Dota 2 - not even on high settings)?

Thank you guys in advance for your help!

 

[ahs89]

I believe in your case it is due to the processor as you mentioned in your earlier post that fan starts to make noise when you put a load on your CPU. Possibly it could be due to obsolete heat paste or your CPU fan is not intact with processor properly.

You can also refer to this guide for data 2 lag.
https://www.killping.com/blog/dota2-lag-fix/

Sometimes this kind of guides can also help you with stuttering and lag issues.