Today I randomly decided to read some newer reviews of the Asus Essentio CG5290 I bought a few years ago. A lot of people mentioned that the power supply wattage is too low (500 W when Asus apparently recommends at least 600 W) and that the single 120mm fan isn't enough.
I have no problem swapping out the power supply, but I am uncertain about the fan... or cooling options in general. The desktop is used for software development and I don't mess with overclocking or gaming, so I'm not sure if I really need to be concerned about the temp. Usually, the only time the CPU usage is ever extremely high is when I've done a Project Euler problem wrong. Every time I have checked the CPUs they have all been within normal temperature ranges. However, I would still like to look into it and was wondering what options are available.
Here is a picture of what's inside:
To add a second fan would I need to cut out a hole in the case somewhere or is it possible (useful?) to stack two fans? As another option, could adding a better fan be sufficient? Or, do I even need to be concerned about cooling if I haven't noticed any problems (although, I'd rather prevent any issues from arising).