CPU overheating even when having nothing open

[SaltySquidwoord]

My cpu keeps overheating for no reason at all, it keeps going above 99 degrees C. I can't do anything, all my games keep stuttering, well, whenever I move my mouse it's fine, but when I go idle it drops down to legit 1 fps until I start moving my mouse again. I can't browse the internet, all it does is stutter, my computer sometimes even restarts itself. Can anyone help me? Here are my specs.

 

i5-2400 at 3.1 GHz

8GB RAM

RX480 4GB OC

[Marinatall_Ironside]

2 minutes ago, SaltySquidwoord said:

My cpu keeps overheating for no reason at all, it keeps going above 99 degrees C. I can't do anything, all my games keep stuttering, well, whenever I move my mouse it's fine, but when I go idle it drops down to legit 1 fps until I start moving my mouse again. I can't browse the internet, all it does is stutter, my computer sometimes even restarts itself. Can anyone help me? Here are my specs.

 

i5-2400 at 3.1 GHz

8GB RAM

RX480 4GB OC

What's your cooler? We need to know so we can help you!

[Droidbot]

Check your cooling system. 

Check the temperature sensors on the board. 

Contact Intel, a temperature sensor may have failed. 

[SaltySquidwoord]

2 minutes ago, JurunceNK said:

What's your cooler? We need to know so we can help you!

I'm not too sure, I bought a prebuilt Dell OptiPlex 990 Mini Tower and upgraded the RAM and GPU and ever since I upgraded the GPU it's been happening.

[Marinatall_Ironside]

4 minutes ago, SaltySquidwoord said:

I'm not too sure, I bought a prebuilt Dell OptiPlex 990 Mini Tower and upgraded the RAM and GPU and ever since I upgraded the GPU it's been happening.

Did you dust out the computer? If not you should do that.

 

If you're willing to remove the heatsink, then replace it with good thermal compound (preferably Arctic MX-4) and mount it back on.

[SaltySquidwoord]

16 minutes ago, JurunceNK said:

Did you dust out the computer? If not you should do that.

 

If you're willing to remove the heatsink, then replace it with good thermal compound (preferably Arctic MX-4) and mount it back on.

I've dusted it out twice, but I haven't put any of it on, only used to original it came on with, but anyways I have the model number for the heatsink;

PVB120G12H-P01

Edited June 21, 2017 by SaltySquidwoord

[Marinatall_Ironside]

1 minute ago, SaltySquidwoord said:

I've dusted it out twice, but I haven't put any of it on, only used to original it came on with, but anyways I have the model number for the heatsink;;

PVB120G12H-P01

Holy shit that CPU fan cooler    

 

Uhh how wide is your prebuilt? You may be able to get something like the Noctua NH-L9i if the motherboard doesn't use proprietary mounting holes.

[SaltySquidwoord]

2 minutes ago, JurunceNK said:

Holy shit that CPU fan cooler    

 

Uhh how wide is your prebuilt? You may be able to get something like the Noctua NH-L9i if the motherboard doesn't use proprietary mounting holes.

I'm not too sure. The RX480 wasn't able to fit into it so I moved all the parts into a box until I got a new case.

[SaltySquidwoord]

4 minutes ago, JurunceNK said:

Holy shit that CPU fan cooler    

 

Uhh how wide is your prebuilt? You may be able to get something like the Noctua NH-L9i if the motherboard doesn't use proprietary mounting holes.

Do you think it could be the GPU itself? I just went onto my integrated graphics and the cpu is just a little over 70 degrees C. But when I have the 480 in, it goes above 99 and stays above it.