蘋果在發佈新MacBook Pro的時候,強調四個Thunderbolt 3連接埠是一樣的。不過,若果認真一點去看,再配合蘋果最新發佈的支援文件,其實四個連接埠表現是有不同的。
公平一點來說,15″型號以及沒有Touch Bar的13″型號的四個連接埠的速度表現是一樣的,可是在擁有Touch Bar的13″型號中,右邊的兩個Thunderbolt 3連接埠的速度是比較慢的。蘋果支援的文件如下,當中寫明右邊的Thunderbolt 3的PCI Express頻寬較少。
Late-2016 MacBook Pro models vary slightly in the data speeds they provide to each Thunderbolt 3 port.
MacBook Pro (15-inch, Late 2016) delivers full Thunderbolt 3 performance on all four ports.
MacBook Pro (13-inch, Late 2016, Four Thunderbolt 3 Ports) supports Thunderbolt 3 at full performance using the two left-hand ports. The two right-hand ports deliver Thunderbolt 3 functionality, but have reduced PCI Express bandwidth.
MacBook Pro (13-inch, Late 2016, Two Thunderbolt 3 Ports) delivers full Thunderbolt 3 performance on both ports.
若果要達至最佳表現,蘋果建議13″ MacBook Pro用家接駁至左邊的Thunderbolt連接埠。不過,值得一提的是,所有的型號都可以提供完整的USB 3.1 Gen 2的10Gbps速度表現。
來源:MacRumors