Laptops were designed to be portable. Nowadays, we have thinner, lighter laptops which you can carry easily. It has a built-in monitor, keyboard, touchpad, speakers etc. This means it is fully functional, even when there are no peripherals attached to it. It is easier and faster to setup, and requires very fewer cables for connectivity. Some newer laptops even have touchscreens, so you may not even need to use a keyboard or mouse.
1. System Board/Mother Board: The system board is the main logic board in any laptop. All internal components are connected to the system board. This is one of the most expensive parts in a laptop.
2. RAM/Memory: Laptop memory are smaller than desktop ones and are designed to save good space. The more then RAM, better the performance. Some laptop memories are upgrade-able and some aren’t. Nowadays, laptops do come with Expandable slots.
3. Processor: Desktops are quicker than laptops. The two are closer than you might imagine in the arena of processor performance, but desktops enjoy a major advantage in graphics, which is what really matters for gaming. You’re also going to pay more for a gaming laptop than a desktop and, once the laptop is obsolete, your upgrade options are limited.
4. Hard Drive: The largest difference between 2.5 and 3.5 inch hard drives is their size. Two and a half inch hard drives aren’t just narrower. They’re also shorter and thinner, which makes them popular for laptop computers while desktop business computers typically use 3.5 inch drives. Other than the size, though, the two types of drives frequently have the same components inside and, as of the date of publication, use the same connectors. Solid state drives, which use flash memory chips in place of spinning magnetic platters, almost always come in a 2.5 inch form factor, regardless of whether or not they are intended for desktop or notebook use.
5. CD/DVD Optical Drive: Laptop DVD drives are relatively smaller and thinner. Functions are similar to desktops.