The world's largest memory chip maker posted an operating profit of 9.18 trillion won ($6.6 billion) "largely due to one-off costs".

The comments illustrate the challenges facing the company, which has been the world's biggest memory chipmaker for three decades but is battling growing competition

Operating profit for Samsung likely stood at 10.33 trillion won ($7.67 billion) in the quarter ended Sept 30

January-March operating profits were expected to rise 931.3 % to 6.6 trillion won ($4.89 billion) while operating profits in the same period last year totalled around 640 billion won

Sales dipped 3.8 % to 67.78 trillion won, while a net profit of 6.34 trillion won was down 73.4 %