The photos show a heat sinks covering dual G5 processors, and a new memory configuration. These pictures were included in a manual send out by Apple last month.
Speculation has raised that this new machine may be launched rather sooner than later. The fact that lately wait times for the current Power Macs at the online Apple store have raised to 7-10 business days somewhat confirms this. Estimated shipping dates of Apple's computers are frequently extended when a new product revision is impending.
There is also speculation that Apple could be getting ready to revamp its flat-panel iMac line in the coming weeks. The company last updated the Power Mac and iMac lines in November, when it added a 20-inch iMac model and introduced a dual 1.8GHz option for the Power Mac line.Source: Cnet
In its last quarterly earnings conference call in April, the company blamed chip supplier IBM for not being quick enough in supplying G5 chips, which hurt Apple's ability to ship its Xserve G5 server. Big Blue executives recently said the company's production woes were easing.
When Apple CEO Steve Jobs introduced the first Power Mac G5s last June, he said that they would be available at speeds up to 3GHz within 12 months' time. IBM executives on last month's conference call refused to say whether the chipmaker would be in a position to allow Apple to meet that goal.