Last year's MacBook Pro featured an impressive PCIe SSD that had max read speeds of 1.6GBps and max write speeds of 1.5GBps.
That's now been destroyed by the new MacBook Pro. The 13-inch model features max read speeds of 3.1GBps and max write speeds of 2.1GBps. The 15-inch model is slightly faster with write speeds up to 2.2GBps.
Adopting PCIe/NVMe standard allows Apple to deliver higher performance in terms of read/write speeds and latency compared to SATA. Typical SATA SSDs top out at around 500MBps.
"With regard to PCIe, Apple has been a pioneer when it comes to PCIe/NVMe storage," said Jeff Janukowicz, research vice president at IDC. "They were the first PC company to broadly adopt it across its laptop portfolio while other companies today are still just using it in a very limited portion of their PC lineup."
The broader PC market is expected to switch over to PCIe within two years but SATA should stay popular for some time due to customers upgrading their older devices.
A recent tear down found that Apple's SSD in the new MacBook Pro is removable. So it's possible we could see a third party upgrade option down the road. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.