Since the max GPU clocks are south of 1.2GHz, this is officially Intel's HD 5000 graphics and not Iris despite using the same silicon. Both parts have Intel GT3 graphics clocked at a max of 1GHz on the i5 and 1.1GHz on the i7. You can get a 1.7GHz Core i7 upgrade with a 3.3GHz max turbo (i7-4650U). Ivy Bridge in these low wattage platforms. As we found in our Haswell ULT review, CPU performance isn't something you can expect to see more of with Haswell vs. Don't be fooled by base clock, it's the combination of base clock, max turbo and cooling solution that'll determine performance here. The impact on the MT test is about 5%, it's there but not substantial. The 1.8GHz i5 in the 13-inch ended up being a bit quicker than the 1.3GHz 4250U this generation in the multithreaded test, but in single threaded performance the two are equal. To confirm, I ran a couple of Cinebench tests and generally found performance similar to that of last year's models: Although the base clock is lower, I wouldn't expect substantially lower performance since the max turbo is unchanged as is the chassis that has to dissipate the thermals. The base clock drops to 1.3GHz across all of the models, but max turbo remains at 2.6GHz. With the new MacBook Air, Apple moves to a Core i5-4250U. The big changes however are on the CPU, NAND and DRAM fronts. The 11-inch model moves to 38Wh (8.6%) while the 13-inch model goes to 54.4Wh (8.8%). There's a slight increase in battery capacity. Both the 11 and 13 inch models retain their non-Retina 1366 x 7 x 900 displays. The chassis itself didn't get any updates, nor did the displays. This morning Apple updated its MacBook Air to Intel's Haswell ULT silicon.

Upgrade my macbook air mid 2013 ssd