Michael bought an OCZ SSD to speed up his computer, and it's much faster than the SanDisk SSD. Leo says that's because of trim. SSDs don't have to be defragged, but with trim, they can accomplish something called "wear leveling." That way the SSD won't wear out prematurely due to an overused sector. It also allows it to be consistently faster. Without trim, SSDs tend to slow down over time. The good news is that trim is built into the OS now. He doesn't need AHCI, native command queuing, or hot swapping.