Penryn works with a series of chipsets Bearlake, released in 2007, some models that support the new standard DDR3 SDRAM, and support processors with data bus 1333 MHz, 1600 MHz. On laptops and other mobile systems, Penryn runs on a Crestline chipset that is disabled for DDR3 or GS45, which supports both DDR2 and DDR3.