"We believe it will be a credible contender to x86," he said.
Magna 2001 is available now and will be on show at the SC15 supercomputing conference in Austin Monday, Coull said.
Details of the system E4 Computer Engineering is announcing were not immediately available.
Other OpenPower servers already on the market include two models from Taiwan's Tyan, a system from Cirrascale that incorporates Nvidia GPUs, and several models from RedPower that are on sale in China, according to IBM.
Systems have also been announced by RackSpace, and by three Chinese vendors -- Inspur, NeuCloud and Chuanghe. China could be a big opportunity for IBM because the government there is encouraging development of home grown products, and the OpenPower model allows Chinese firms to build both Power processors and Power servers.
Sign up for CIO Asia eNewsletters.