How to convert Laptop into Desktop PC?

I will tell you how I built a desktop computer using the motherboard from an old laptop that had a cracked LCD and a broken hard drive. I used Acrylic Alumina thermal adhesive to paste a big piece of aluminum on top of the CPU. It is actually glued on top of the heat pipe that is cooling the CPU.

Do you need more Pixel Density (PPI) or Retina?

Resolution is often the only specification quoted when referring to the finest of a digital image but there is actually much more to it than that. A five-inch 1280x720 image will look sharp and crisp on your phone but if you project it as 720p image in a movie theater, it would look horrible. This is where pixel density comes in. It is a measure of the resolution that also accounts for the size of the screen. PPI has become the most common way to denote pixel density although pixels per centimeter or PPC can also be used. To calculate PPI, simply measure 1 inch diagonally on the screen and then draw a line diagonally through them, and find out how many pixels it intersects with.