Apple has announced "The new Power Mac G5".

The new Power Mac G5 will include dual processors across the board at up to 2.5GHz PowerPC G5, and features a new liquid-cooling system and 8x DVD-R SuperDrive.

According to Apple, the top model features two 2.5GHz processors and the "industry's fastest" frontside bus running at 1.25GHz per processor and offering a bandwidth of up to 20GBps. It will cost £2,199 including VAT.

Some customers may be disappointed that Apple is still to break the 3GHz barrier – Apple CEO Steve Jobs claimed last year that his company would reach this speed by summer 2004.

The Power Mac G5 utilizes 64-bit processing technology for memory expansion up to 8GB (on the dual-2.0GHz and dual-2.5GHz models), and advanced 64-bit computation while running existing 32-bit applications natively. It also offers expansion with dual-1.5Gbps serial ATA interfaces, the industry’s fastest PCI-X interface technology, and AGP 8X Pro graphics, according to Apple.

The dual-1.8GHz and the dual-2GHz G5s feature the NVidia GeForceFX 5200 Ultra graphics card with 64MB of RAM. The 128MB ATI Radeon 9600 XT graphics card features in the dual-2.5 GHz model. The ATI Radeon 9800 XT high-performance card is available as a build-to-order option – it costs £260 to add one to the 2GHz and 1.8GHz models, and £220 to add to the 2.5GHz model.

Apple senior vice president of worldwide product marketing Phil Schiller said: “Our professional customers, across many creative and scientific markets, have been impressed with the extraordinary performance of the dual processor Power Mac G5 running Apple’s Unix-based Mac OS X. This new Power Mac G5 line has dual processors in every model to deliver even higher performance for our pro customers who need it.”

All Power Mac G5 systems ship with Mac OS X version 10.3 Panther. Apple says the combination of the operating system and the Power Mac G5 "provides creative professionals and scientists with computational power never before realized on a desktop system."

Fastest – really…

Apple's claims that the system is the fastest follow a long running row with advertising standards authorities on both sides of the Atlantic. Only today the UK ads watchdog, the Advertising Standards Authority, published findings of its investigation into complaints about Apple's advertising of the original G5.

Apple is offering details of the tests it undertook to prove its claims on its Web site. The company says: "The Power Mac G5 outperforms competing desktops on the market today, and ran significantly faster than 3.4 GHz Pentium 4 systems on performance tests of the most popular applications for creative professionals and scientists."

It offers the following examples:

"On a test of 45 commonly used actions, Adobe Photoshop ran almost twice as fast on a dual-2.5 GHz Power Mac G5 than on a 3.4 GHz Pentium 4-based PC;

"Logic Pro 6 on the dual 2.5 GHz Power Mac G5 played up to 138 more tracks with reverbs (over four times more) than with Cubase SX on a 3.4 GHz Pentium 4-based PC; and

"Final Cut Pro HD running on a 2.5 GHz Power Mac G5 can run eight streams of 8-bit SD video versus five streams on a dual 3.06 GHz Xeon-based Avid workstation."

Pricing and availability

The dual-1.8GHz and dual-2.0GHz Power Mac G5 models are available now, and the dual-2.5GHz Power Mac G5 model is expected to be available in July through the Apple Store.

The dual-1.8GHz version will cost £1,449; the dual-2GHz will cost £1,849; and the dual-2.5GHz will cost £2,199. All prices include VAT.