<P> Some reviewers applauded the MacBook Pro for its doubling or tripling the speed of the PowerBook G4 in some areas . For example, the 3D rendering program Cinema 4D XL was 3.3 times as fast (2.3 times faster), and its boot - up time was more than twice as quick . The MacBook Pro generally outperformed the PowerBook G4 in performance analyzer utility tests XBench and Cinebench . Reviewers lauded the screen's maximum brightness, 67 percent higher than the PowerBook G4; the excellent horizontal viewing angles; the matte options; and the bright, crisp, and true colors . Although the screen offered fewer vertical pixels (1,440 × 900 in the MacBook Pro instead of 1,440 × 960 in the PowerBook), one reviewer called the screen "nothing less than stellar". Reviewers praised the new MagSafe power adapter, although one reviewer said it disconnected too easily in some instances . They also praised the backlit keyboard, large trackpad, and the virtually silent operation of the machine . The new laptop also offered better wireless performance . </P> <P> One reviewer criticized the decision to underclock the ATI Mobility Radeon X1600 graphics card by about 30 percent its original speed . The notebook was also noted for running hot . Users complained that upgrading system memory was harder than in older Apple notebooks . Since the dimensions for the 15 - inch MacBook Pro were tweaked slightly from the 15 - inch PowerBook G4, older accessories such as notebook sleeves did not work with the new models . Some users noted a slight flickering when the screen was on lower brightness settings . Apple increased the battery capacity by 10 Wh, going from 50 in the PowerBook G4 to 60, but the more powerful Core Duo CPU required more power . Battery life therefore remained about the same as in previous models, at three - plus hours . </P> <Table> <Tr> <Td> </Td> <Td> Obsolete </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Obsolete </Td> </Tr>

What kind of processor does macbook pro have