Once again I am very pleased articles western digital, unlike other marks are the only hard drives that do not create me to errors in file systems after several years. Silent drive, durable and fast, just enough and a great price. Allow just a SATA cable to connect it to the motherboard and if you have a small box make sure you have the space and that nothing (processor, graphics card, RAM) prevents access to the location of hard drive. Now I need a Model 10 000 revolutions for the hard disk of the OS. WD VelociRaptor WD1500HLFS - Hard drive - 150 GB - internal - 3.5 "- SATA-300 to 10,000 rev / min - buffer: 16 MB