Upgrading from HDD to SSD hard drives for APPLE MAC

bleggee
bleggee used Ask the Experts™
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I want to buy or upgrade a 21.5" IMAC (2017) Hard Drive with Internal SSD hard drive.
My main question here is about "BLADE" vs "SATA" connection, but I am also confused!
Does anyone know of any issues or performance differences between these options:
Option #1 Buy Apple 2TB SSD, "BLADE" type of SSD
or
Options #2 Buy macsales_DOT_com's 2TB SSD "SATA" type of SSD
or
Option #3 Other options to end up with 2TB SSD Internal hard drive IMAC? I can only find this 1 macsales_DOT_com vendor that sells anything compatible. Strange. I would think that there are other options, even with Apple Proprietary hardware, if one vendor can do it.
Thanks in advance for any help!!
- B
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A pcie ssd is not proprietary.
So buying from any reputable vendor like Samsung or WD  should work.
The main difference between SSD pcie and sata ssd is the theoretical interface speed.
I've seen some comparisons on some websites and it's not quite what you think.

https://www.youtube.com/watch?v=AMabDLfeC5U

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Commented:
Thank You!!!! I just ordered the Crucial version & saved $250

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