By AppleInsider Staff

Published: 11:00 AM EST

Online retail giant Amazon.com appears to have pre-announced Apple's new Power Mac G5 systems on its website, listing three new models with speeds of up to dual 2.7GHz.

While sources had previously predicted that Apple would begin introducing new hardware on Tuesday, Apple has yet to make any official announcements. But more recent information suggests the company will now use Wednesday to roll out new CPUs, including Power Macs which go by the code-name Q87.

Nevertheless, Apple authorized reseller, Amazon.com, appears to have jumped the gun and is already listing three new Power Mac G5 models.

A low-end dual 2GHz model sports 512 MB of DDR SDRAM, a 160 GB hard drive, and a 16x Dual Layer SuperDrive (CD/DVD+RW) for $1,994.99.

The mid-range dual 2.3GHz model is listed as including 512 MB of DDR SDRAM, a 250 GB hard drive, and a 16x Dual Layer SuperDrive (CD/DVD+RW) for $2,494.99.

At the peak of the new product line is a dual 2.7GHz model packing 512 MB of DDR SDRAM, 250 GB hard drive, and a 16x Dual Layer SuperDrive (CD/DVD+RW) for $2,994.99. Sources added that this model also sports a ATI Radeon 9650 graphics card (one dual DVI one single) and a 1.35GHz frontside bus.

All three configurations will ship with Mac OS X 10.4 Tiger preloaded. They are currently available for pre-order.

Sources claim that Apple will officially announce the new Power Macs on Wednesday. They will be available for sale at retail stores beginning 6PM on Friday.