Originally Tualatin was a name of the Intel's project of transition to the 0.13-micron technology. The CPUs with a new core were in fact the first products of this project, and there are 4 processor families in all codenamed Tualatin (see the Table). As a result, the Pentium III line was divided into two classes - desktop and server processors. An L2 cache of the desktop version was still 256 KBytes, and the second got a twice larger one - 512 KBytes; besides, the Desktop Tualatin lacked for the SMP support. This processor didn't live long: it was mainly delivered to big PC assemblers, and was taken out of the mass market to give way to the Pentium 4. Simultaneously, the Celeron line starting from 1.2 GHz was moved to the Tualatin core, thus, receiving a twice larger L2 cache (256 KBytes) and 0.13 micron technology. But the bus was still operating at 100 MHz. There are also Pentium III-M processors with the Tualatin core meant for mobile systems; they support SpeedStep technology and has a surprisingly large 512 KBytes L2 cache.