It seems likely that Apple was keeping things simple by citing the performance available across the range rather than noting the far higher speed of the top-of-the-range model. PCIe 3.0 is capable of a theoretical maximum of 8GB/sec, allowing plenty of spare capacity for faster future generations of SSD. SATA 3 is good for around 600MB/sec, which was more than fast enough for hard drives but not capable of keeping up with the speeds of modern SSDs. PCIe is a high-speed serial link used only on the latest Macs, replacing the slower SATA connections of earlier machines.
The MBP 15 is able to achieve these speeds because it has a 4-channel PCIe connection to the SSD, in contrast to the 2-channel link on the MBP 13 and MacBook Air models, though from some reader reports this may be the case only on models fitted with 1TB drives. Rest assured that we’re hard at work on our own, faster SSD option for all the new PCIe SSD-based Macs for next year – just as we’ve brought for every model introduced 2012 and earlier. In the meantime here are the quick benchmarks:ġ3” Retina MacBook Pro with a 128GB SanDisk SSD: Both have varying strengths and weaknesses, but both are fast for typical uses. Results can vary with different brands and configurations. And it’s worth noting that some SSDs that Apple is installing have a Marvell controller and others have a Samsung PCIe controller. UPDATE: OWC Now Offers SSD Upgrades for 2013-Current MacBook Air & MacBook Pro with Retina display models and OWC Reveals Apple Boot Camp Support for SSDs The 256GB Samsung SSD in the 15″ model offers about a 400MB/s increase in write speeds over the 128GB SanDisk SSD as our 13-inch model was configured.
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