Storage info for each MacBook Air — details on speed, dimensions, and hard drive and SSD interface specifics — is listed below along with common identifiers suitable to identify a MacBook Air in order to determine which hard drives and SSDs are compatible. Unigine Heaven 4.0 (Medium); FPS: 14.4; Overall: 438. Blackmagic Disk Speed test: Write average: 612.4 Mbps; Read average: 1302.4 Mbps. Battery, streaming 1080p video via Wi-Fi: 13 hours and 24 One notable detail confirmed by The Verge is that the $1,199 base model equipped with 256GB of storage has a single NAND chip, which will lead to slower SSD speeds in benchmark testing, but real-world performance may vary. Last month, it was discovered that the 256GB model of the 13-inch MacBook Pro with the M2 chip has up to 50% slower SSD Here are the full Disk Speed Test results gathered by Vadim Yuryev at Max Tech. 13-inch MacBook Pro (M1/256GB) Read Speed: 2,900 MB/s. 13-inch MacBook Pro (M2/256GB) Read Speed: 1,446 MB/s. 13
With 256GB of storage capacity, the MacBook Air features a single 256GB NAND chip, leading to up to 50% slower read speeds and up to 30% slower write speeds compared to the previous MacBook Air
Apple aims the "Pro" at those people. Yet in some aspects, a base M1 MacBook Air beats it, due to the SSD speed. The Max Tech video shows that, in addition to major slowdowns with photo and video work, there are noticeable delays just with web browsing, due to the slower swap speed: Does 512GB SSD FIX the M2 MacBook Pro?
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