i said decent not great.
also GHz means jack stuff unless it's low end, which this is not.
Compared to standard laptops, it's slightly better.
it's totally possible. somebody at my school built their own laptop. it just took like 6 months.
Sure, it's possible. But it's so difficult you may as well forget about it.
The only parts you can purchase for a laptop is a hard drive, CPU, and GPU. Those of which you can find on sites like Newegg that carry few of them. After that you need to find a case and monitor compatible with each other that supports a certain motherboard. It seems motherboards don't carry a design standard so almost all of them are unique with their own case. Usually you have to look for salvaged parts on eBay, which very rarely tell you the important details of the hardware.
In the end you have a laptop that has the specs similar of every laptop produced today.