I am using iMac 21.5 4k display 2017 only HDD model not a fusion drive. I want to upgrade my pc storage to ssd. I think nvme ssd is the best choice but someone said only HDD model doesn't have a PCI-E slot. I want to know does my iMac has it.
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Sorry, but your iMac don't have PCI-E:
This model has a Serial ATA (6 Gb/s) connector for a 2.5" hard drive. If configured with a "Fusion" Drive or an SSD at the initial time of system purchase, it also has a PCIe connector, but as first reported by site sponsor OWC, this connector is not present if the system only is configured with a hard drive.
This model has a SATA III (6 Gb/s) connector for a 2.5" hard drive or SSD. If the system is configured with an SSD or a "Fusion Drive" at the time of initial purchase, it also has a dedicated PCIe connection. If it was not configured with an SSD or a "Fusion Drive" initially, the applicable PCIe connector is not present and it is not possible to install a second drive later.
Source https://everymac.com
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Thank you for answer. Is installing a 2.5" sata ssd on my iMac the only way?
@pcj0819 I seen somewhere NVMe to SATA reduction (for example https://www.amazon.co.uk/NFHK-SFF-8639-A...) -> not sure if it's supported on iMac's.
Maybe some external drive can be solution - SATA SSD are usually about 550/520 read&write speed so if you can find something faster then that. But I will go with SATA SSD unless you really need something faster ?
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