Although a seemingly diverse array of SATA 6Gb/s SSDs have launched in recent months, virtually all of them are powered by the Marvell 88SS9174 or SandForce SF-2200 controllers. The former made its debut with the Crucial RealSSD C300 and has survived longer than anticipated, surfacing again in Crucial's m4 series. Intel also adopted it for its latest-generation products. Between those two drives, we favor the m4, but it's far from today's top contender.SandForce's second-generation controller got off to a rocky start. OCZ's Vertex 3 stormed out of the gates in April, seizing control of our performance graphs. Despite an impressive showing, early adopters reported many glaring bugs with SF-2200-based drives. Those claims sent OCZ and other manufactures scrambling to release a series of firmware updates. Fortunately, most of the major kinks seem to have been ironed out now and that's given even more vendors, such as Patriot and Kingston, the confidence to launch SandForce-flavored SSDs. Despite an increasingly saturated market, OCZ has maintained a stiff grip on the competition as it still offers the best performance versus price ratio of any SF-2200 SSD.