When you order an iMac through the Apple Online Store, you have the option to upgrade the memory to 8GB (a pair of 4GB modules) on all iMac models for $200, or to 16GB (four 4GB modules) on the 27-inch models for $600. (The standard-configuration Mac Pros and MacBook Pros have both Hyper-Threading and Turbo Boost.)Īll iMacs come standard with 4GB of memory, installed as a pair of 2GB modules. To get an iMac with a processor that has both Turbo Boost and Hyper-Threading, you’ll have to select the $200 Core i7 upgrade option for the $1499 21.5-inch iMac or $1999 27-inch iMac. However, the Core i5 processors in the standard-configuration iMacs do not have Intel’s Hyper-Threading technology, which creates two virtual cores for each physical core present in the processor, improving performance.
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