Chief executive Lisa Su admitted that ARM-based server chips have experienced slower-than-expected reception from the owners of data centres and server farms.

AMD delayed its own ARM-based Opteron microprocessor, code-named Seattle, until the fourth quarter of this year. ARM was having a harder time proving itself to the multibillion-dollar market for high-end server chips.

An engineering sample of AMD's long awaited 8 core server SOC code named "Hierofalcon" has been spotted and tested and according to WCCTech it looked pretty good. Itis based around 8 ARM-64bit A57 cores running at 2.0Ghz. And although Hierofalcon maxes out at frugal TDP of 30W. 

So even the promising reviews aren't enough for AMD to be optimistic about the ARM based gear.

Su said in an analyst conference call that the company expects to see "modest production shipments" of Seattle in the fourth quarter. Meanwhile, AMD's Intel-compatible "x86" server chips will be the company's mainstay product offering for data centres.

She said that AMD was continuing its ARM efforts and is seeing them as a longer term bet.