Jetdrive 850 Nvme PCIe x4 Macbook pro update

[leechat]

Hello everyone,

I updated my Macbook Pro mid 2015 model with JetDrive 850 as it is advertised to be Nvme PCIe x4 capable drive.

But I only see speeds equivalent to Apple SSD which is around 1,300 MB/s Write and and an improved read of 1,6000 MB/s on blackmagic tests. Apple SSD was poor for read 1,200MB/s

But I am not sure why it was advertised NVme, PCIe x4 with such low speeds?

Below are my details, its listed under NVMExpress section in the Hardware section:
Capacity: 480.1 GB (480,103,981,056 bytes)
TRIM Support: Yes
Model: TS480GJDM850
Revision: R0615
Link Width: x4
Link Speed: 8.0 GT/s
Detachable Drive: No
BSD Name: disk0
Partition Map Type: GPT (GUID Partition Table)
Removable Media: No

 

[weckart]

Did you bother checking the specs of the Jetdrive before splashing out money on it?

https://www.transcend-info.com/Products/No-956

Max read speed: 1600MB/s
Max write speed: 1400MB/s

Seems to be working fine and according to spec.

 

[leechat]

Did you bother checking the specs of the Jetdrive before splashing out money on it?

https://www.transcend-info.com/Products/No-956

Max read speed: 1600MB/s
Max write speed: 1400MB/s

Seems to be working fine and according to spec.

Thanks, I wanted to play safe, instead of trying Samsung + adapter solution
This works fine, just had more extra storage space store to 512 GB. Battery usage seems fine ..
No issues till now

Should have read the speeds Reading it NVMe PCIe x4 jumped around it

 

[weckart]

Thanks, I wanted to play safe, instead of trying Samsung + adapter solution
This works fine, just had more extra storage space store to 512 GB. Battery usage seems fine ..
No issues till now

Should have read the speeds Reading it NVMe PCIe x4 jumped around it

PCIe 4 lanes means nothing on its own. The combination of PCIe 3.0 and 4 lanes gives the fastest performance. This drive is underwhelming in that respect, performing no better than a PCIe 2.0 x4 drive.

 

[alex_at]

I have a 1TB Version of this drive in my 2015 15". During daily usage you won’t notice the speed diffence - but you will notice the extra space.

The only downside to this Drive is the slightly slower boot performance. (But I didn’t reinstall the OS, I cloned it from the original SSD - that might be a contributing factor.)

Trim works fine too.

Unfortunately from 2016 onwards there will be no more storage upgrade since Apple soldered the ssd on the board.