The Register UK is reporting From a news releasethat Apple is working on improving speeds in its PowerMac G4 line in part by increasing bus speeds for the machines. The article claims that Apple will be announcing faster PowerMacs at MACWORLD New York, and that the machines could run as fast as 1.5 GHz. More importantly from a performance standpoint, the new units would also incorporate improved bus speed, which would itself offer much improved performance. From The Register UKis piece:

Recent word from sources close to Motorola confirm that a significant speed bump will be timed for MACWORLD Expo in July, raising current bus speeds, and seeing new 7470-based G4s raise frequencies to as high as 1.5Ghz.

The 7470 supports PC2100 DDR-SDRAM memory at 266MHz, as we told you back in February, and PC2100 made its debut in Appleis product line with the launch of the Xserve rack last week. More importantly the new G4 supports front side bus speeds of 133MHz and 166MHz, which double to 266MHz and 333MHz.

The most dramatic bandwidth improvement would be a jump to 266Mhz, and although we donit know if that choice has been made, but a more modest increase to 166Mhz (2x) would be more in keeping with recent announcements. The first AMD Athlon debuted on what then was an incredibly fast bus speed of 266Mhz in 1999. The recent Intel Northwoods deploy a 400Mhz bus.

Check out the full article for more information that was not quoted. Thanks to Observer Sigmascape for pointing us to this article. You can join in on the discussion of this topic in our forums.