The front plate was redesigned for a slot-loading optical drive. Improvements included one or two 1.33 GHz PowerPC G4 processors, faster memory, and higher capacity Ultra ATA/133 hard disk drives. On February 10, 2003, Apple released an improved and expanded Xserve lineup. Xserves sold before Augshipped with Mac OS X v10.1 'Puma' Server, while those sold after shipped with Mac OS X v10.2 'Jaguar' Server. Initially, two configuration options were available: a single-processor Xserve at US$2999, and a dual-processor Xserve at US$3999. Apple introduced the Xserve on (released in June).