The company aims to sustain the momentum it has built up over the past year with its Unix range, which is the fastest growing of its four server lines.
IBM continued to sell pSeries and RS/6000 models well in the first quarter of this year, according to IBM UK pSeries sales director Helen Cook. She said UK revenue increased by 38%.
The company said the advanced processor technology is the most important new feature of the servers. Both use copper and silicon-on-insulator chip technology, which first appeared in the top-end p680 introduced last October.
The major benefits over conventional logic technology processors offered by competitors are lower power consumption and better performance.
The p660 has produced benchmark figures of 57,000 tpmC transactions per minute, the most recorded by any six-way processor, and nearly double the performance of its predecessor the RS/6000 H80.