I think he meant that the P4 (netburst) architecture wasn't very good. It was optimized for high clock rates und utilized a long pipeline for that. I had some f

I think he meant that the P4 (netburst) architecture wasn't very good. It was optimized for high clock rates und utilized a long pipeline for that. I had some fellow students back in those days that overclocked their P4s to 4Ghz and beyond, which was quite insane compared to other architectures (P3 and AMD). However as a tradeoff the architecture was not very efficient. With the Core2 line Intel then moved into a completely different direction with higher efficiency and lower clock cycles. Core2 was considered to be a massive success compared to P4.