http://ark.intel.com/products/family/83613/Intel-Core-M-Processors#@Mobile Looking at that, All the tray costs about $281. Meaning that's about how much each one cost for Apple. They're all the same. I notice the 1.3GHz is really the same as the 1.2GHz. Apple just happened to modified the TDP (Overclock) it and sell it as an upgrade for +$150. Both the 1.2GHz and the 1.3GHz really started out as 1.2GHz, both could be overclocked to 1.3, even 1.4 for one of them. The only difference is Turbo Boost, which is the "hurry up and finish" part when you're doing intensive stuff. Well played Apple. Not that I care about any of this. I have a built desktop for performance. It's just something interesting for anyone who cares. Here are the 3 CPUs Apple is using in their Macbooks. http://ark.intel.com/products/84672/Intel-Core-M-5Y71-Processor-4M-Cache-up-to-2_90-GHz http://ark.intel.com/products/84669/Intel-Core-M-5Y51-Processor-4M-Cache-up-to-2_60-GHz http://ark.intel.com/products/84666/Intel-Core-M-5Y31-Processor-4M-Cache-up-to-2_40-GHz Don't be surprised if that 256GB vs 512GB SSD chip costs the same. Apple is just making a killing from it.