Complex sentence: In 2002 problems of overheating led Intel to abandon further development of its Pentium 4 experiment in high clock speeds, instead focussing its future plans on the Pentium M architecture which incorporated RISC techniques to the point that the distinction between this and CISC was now meaningless.
Split into simpler sentences: In 2002 problems of overheating led Intel to abandon further development of its Pentium 4 experiment in high clock speeds. Instead, Intel focussed its future plans on the Pentium M architecture which by then incorporated RISC techniques to the point that the distinction between RISC and CISC was now meaningless.