SaltySquidwoord

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.

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.

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

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.

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

I have an i5-2400 3.1GHz with 8GB of RAM and an RX480 Armour OC 4GB

Mostly every time I run black ops 3 I get this message that says "Your computer is low on memory" and it closes my game, I was really far into it and lost all my progress, and I had task manager open and had 2gb left of free ram, anyone know how to disable this message so it won't close my game while I'm playing?