ATI Technologies is taking responsibility for releasing details of some of Apple's new Macs before Steve Jobs' keynote speech at Macworld Expo last week.

ATI released the product details on Monday, July 17, two days before Apple chief Jobs gave his keynote speech in New York. ATI - the supplier of graphics cards for all Apple computers - leaked G4 and iMac specs in a pre-Expo press release distributed by Business Wire Trade Show Services.

Upset ATI spokesman Brian Chadderton said Apple was "obviously upset" by the leak, which led to "fairly lengthy discussions" between the two companies.

The controversial press release included the lines: "In a keynote, wait for Apple to announce three new systems with ATI graphics in them. One will be an iMac with the Rage 4XL chip, the remaining two are Power Macs which will ship with Rage 128 Pro standard and Radeon."

Blame ATI spokesman Brian Chadderton said: "From ATI's perspective, information was erroneously provided to Business Wire. We take full responsibility for that."

Since the mishap, discussions have taken place between ATI and Apple about their relationship, Chadderton added. ATI has provided hardware for Apple since 1996. Apple currently utilizes ATI's Rage 128 Pro graphics card and the necessary drivers in all of its current models.

Radeon was for demonstration purposes only at Macworld Expo. Chadderton claimed a deal was never finalized on Apple using the technology, but he acknowledged that a deal was in the works. "It's never a done deal until you start shipping," he said.

The Radeon chip comes with 32MB of DDR (double data rate) memory and supports both VGA (video graphics array) monitors and digital flat-panel displays. It can support resolutions of up to 1,920-x-1,440 pixels and can be hooked up to a large-screen television. AGP (accelerated graphics port) and PCI (peripheral component interface) versions are expected to be available in September, according to ATI.

Ask Apple Chadderton claimed: "Radeon is still on the table. There are still ongoing discussions. Any other comments have to come from Apple."

Apple has no comment on the matter, a company spokeswoman said.