We haven't heard any real rumours on what CPUs we expect the MacBook Airs to have on refresh, so this is for your entertainment. I've done a lot of searching to work out what we might expect for the 11" and 13" models of the MacBook Air. Now firstly, I did some predictions on the MBP processors which can be found here: http://forums.macrumors.com/showthread.php?t=1101568&highlight= Apple hadn't used quad-core processors in its laptops before, so it was a bit harder to predict. With the MBAs, it should be a lot easier. To start off with, the values I got for the TDP of the GeForce 320M iGP weren't the same, I heard different values quoted, ~12W from forums and 20W from wikipedia. In my working, I used the 320M at 12W TDP, which seems the fit best in comparison to the new MBP battery life. All the predictions have been done on the specs of the current MacBook Airs and the current Sandy Bridge Mobile Processors see http://en.wikipedia.org/wiki/Sandy_Bridge. 11 Inch MacBook Air The current 11" MBAs have 1.4 and 1.6GHz Intel Core 2 Duo CPUs with GeForce 320M iGP, with a TDP for CPU/iGP combo is 10+12=22W. Therefore, most logical processors are the ultra low power Sandy Bridge mobile processors, i5-2537M, i7-2617M and i7-2657M. At current price points, it makes sense to go with the i7 chips, the i7-2617M and i7-2657M at 1.5 and 1.6GHz each. These are dual core and two-threads-per-core (2C/4T) and have a TDP of 17W, 5W less than currently required. This will increase the performance of the CPUs considerably, as when needed, they will boost to 2.3/2.4GHz on dual core and 2.6/2.7GHz on single core. The performance of the graphics chips will be comparable to before, if not just slightly slower due to the lower turbo clock on the Intel HD 3000 iGP for these CPUs. The power management features on these processors will reduce the power required considerably when the CPUs are not stressed. So added to better performance, it will result in much cooler & quieter laptops and also longer battery life. 13 Inch MacBook Air The current 13" MBAs have 1.86 and 2.13GHz Intel Core 2 Duo CPUs (2C/2T) with GeForce 320M iGP, with a TDP for CPU/iGP combo is 17+12=29W. In this case, most logical processors are the low power Sandy Bridge mobile processors, i7-2629M and i7-2649M at 2.1 and 2.3GHz each with 2C/4T and TDP of 25W, 4W less than currently required. Again, the new Sandy Bridge CPUs will increase performance a lot. The CPUs will boost to 2.7/2.9GHz on dual core and 3.0/3.2GHz on single core. The performance of the graphics chips will be similar to previous, and the HD 3000 iGP has a higher turbo clock for the low-power SB than the ultra-low-power SB mobile processors (+10% increase). Again, the power management features on these processors will reduce the power required considerably when the CPUs are not stressed. So added to much better performance, it will result in much cooler & quieter laptops and also longer battery life. Summary 11" MBA: 1.5 & 1.6GHz dual-core i7 Sandy Bridge processors @17W 13" MBA: 2.1 & 2.3GHz dual-core i7 Sandy Bridge processors @25W = Faster, quieter, cooler laptops whose batteries last for longer. The CPUs will be much more powerful than before, in fact performance on the 13" MBA may be more powerful than some of mid-2010 15" MBPs.