It also reserves 4 GB of space on the SSD for use as a hard drive cache. Fusion Drive treats the hard drive and SSD as a single 1.125 (or 3.125) TB volume, storing the operating system and all included software on the SSD and initially putting everything else on the hard drive. If you want way more performance, look to the $300 256 GB SSD (768 GB option for 27″ model) or the new $250 1 TB Fusion Drive, which combines a 1 TB hard drive (3 TB option for 27″ iMac) with 128 GB SSD. The 21.5″ iMac ships with a 1 TB 5400 rpm hard drive, and the 27″ model bumps that to a faster 7200 rpm drive.Īnother step forward is the use of two microphones to improve noise reduction. You can order both the 21.5″ and 27″ models from Apple with 16 GB installed, and there’s even a 32 GB option for the 27″ iMac.
If you order your iMac with the base 8 GB of RAM, that’s all you’ll ever have. Another iMac first: You can’t upgrade memory.
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