Pros:
- Aesthetics have improved over the past few years, and many gaming PC cases now come with a big glass window.
- They come with a keyboard and mouse, which is a good starting point for those who don’t have own those yet.
- You save time: both the hours it takes to learn how to build a PC and the 1-3 hours it will take to build your first computer.
- Not needing to worry about compatibility issues between parts and the motherboard is guaranteed to come with a wifi card.
- Not having to deal with the BIOS settings, installing Windows (or updates for either).
Cons:
- Overclocking the CPU is often not a possibility with many prebuilts.
- Having to use the case the manufacturer chooses rather than a case of your choice.
- Most prebuilts are large in size. Compact prebuilts are not commonly sold, and the ones that are will demand a further price premium.
- They come with a cheap power supply: non-modular, non-quiet and the wattage may not be high enough for upgrading to a higher end video card down the road.
- They come with stock CPU coolers and generic which can be noisy at higher loads, whereas a DIY PC of the same price can afford an aftermarket cooler.
- If you plan on upgrading the machine, it’s much less expensive in the long-run to just buy the parts you want rather than buying the prebuilts and the upgrades.