The Revodrive series of SSDs are PCI Express-based controller cards that contain all of the components of two solid state drives and ties them together with a Silicon Image RAID controller chip. Install the card into your PC and see transfer speeds of up to 540 MBps reads and 450 MBps writes (350 MBps sustained write) without batting an eye or mucking about in the BIOS. 4K aligned performance is in the 70,000 IOPS range. Different size drives offer slightly faster or slower read / write and IOPS performance.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips