Newly installed SSD very slow read/write speed

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MacBook Pro（13 英寸，配备 Retina 显示屏2015 年初期）

2015年3月更新的 13 英寸 MacBook Pro 配备 Retina 显示屏，型号为A1502，采用第五代英特尔酷睿 i5 和 i7 处理器，并配备 Force Touch触控板。

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Vishal Sewradj @vk007

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发帖于: 2021年10月5日

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Newly installed SSD very slow read/write speed

Hello,

Today i installed a new SSD into my macbook pro early 2015 (A1502). The name of the SSD is Western Digital Blue SN550 500GB. When i do black magic speed test i only get 400 MB/s write and 1350 MB/s read…. even the standard SSD is faster :( I already tried changing the startup disk and i enabled Trim but no change in speed. I don’t know what to do to increase the speeds of my new ssd.

Thankyou for helping me!

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Already found the answer MBP-2015 has pci gen 2 that’s why the ssd is slower than normal.

由 Vishal Sewradj 完成的 2021年10月5日

@vk007 - You really need to get a SSD that's designed to work in your system. Here's a good guide on the custom Apple SSD's The Ultimate Guide to Apple’s Proprietary SSDs

As @mayer pointed out you also have OWC and you also have Transcend JetDrive 850/855.

All three are good options. I personally don't recommend using M.2 SSD's with the fangled adapters as they often don't work well or lifespan is short as some of the lines Apple has in its interface are not active within M.2 SSD's

由 Dan 完成的 2021年10月5日

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Already found the answer MBP-2015 has pci gen 2 that’s why the ssd is slower than normal. — Vishal Sewradj
@vk007 - You really need to get a SSD that's designed to work in your system. Here's a good guide on the custom Apple SSD's The Ultimate Guide to Apple’s Proprietary SSDs

As @mayer pointed out you also have OWC and you also have Transcend JetDrive 850/855.

All three are good options. I personally don't recommend using M.2 SSD's with the fangled adapters as they often don't work well or lifespan is short as some of the lines Apple has in its interface are not active within M.2 SSD's — Dan