http://en.wikipedia.org/wiki/Intel_Nehalem "Core-wise, clock-for-clock, Nehalem will provide a 15%-20% increase in performance compared to Penryn" If I was to buy a 2.8 or 2.53 MBP now would it be a big deal? Is the Nehalem microarchitecture giving a roughly a 15% increase really going to bother anyone with the New MBP much? What are the likely processor speeds for Nehalem for laptops? I plan on keeping my laptop at least until Macbooks Pro's contain Quad Core processors I'm using it for pro audio (heavy softsynth stuff). Here's a summary of various (sometimes conflicting) predictions/reports... "It has been reported that Nehalem will have a focus on performance, which accounts for the increased core size. Compared to Penryn, Nehalem will have: * 1.1x to 1.25x the single-threaded performance or 1.2x to 2x the multithreaded performance at the same power level * 30% lower power usage for the same performance * According to a preview from AnandTech "expect a 20-30% overall advantage over Penryn with only a 10% increase in power usage. It looks like Intel is on track to delivering just that in Q4." * Core-wise, clock-for-clock, Nehalem will provide a 15%-20% increase in performance compared to Penryn.  PC Watch found that a Nehalem "Gainestown" processor has 1.6x the SPECint_rate2006 integer performance and 2.4x the SPECfp_rate_2006 floating-point performance of a 3.0 GHz Xeon X5365 "Clovertown" quad-core processor. A 2.93 GHz Nehalem "Bloomfield" system has been used to run a 3DMark Vantage benchmark and gave a CPU score of 17,966. The 2.66 GHz variant scores 16,294. A 2.4 GHz Core 2 Duo E6600 scores 4,300. AnandTech tested the Intel QuickPath Interconnect (4.8 GT/s version) and found the copy bandwidth using triple-channel 1066 MHz DDR3 was 12.0 GB/s. A 3.0 GHz Core 2 Quad system using dual-channel 1066 MHz DDR3 achieved 6.9 GB/s. Overclocking will be possible with Bloomfield processors and the X58 chipset. The Lynnfield and Havendale processors will use a PCH removing the need for a northbridge chipset."