Recently I decided to gut an old G4 PowerMac Quicksilver case and replace the innards with a current-generation Windows 8 PC. After much dremeling, drilling, and assembling, I gained a sweet desktop system wrapped in an apple:

System Specs:

Motherboard: Biostar Micro ATX 1155

CPU: Intel Haswell i5 3.0 ghz quad-core

RAM: Crucial 16 GB DDR3 1600 Mhz

HD: Crucial M500 120GB SSD

Video Card: Nvidia GeForce 650Ti 1GB DDR5

Build time: 10 hours