Chosen Solution
Hello guys, today I put a blade ssd in and replaced the HD with a bigger one. Before this my iMac worked perfectly fine, and I can’t imagine the power supply being faulty. Its an iMac late 2013 27” without preconfigured ssd EDIT 1: Just realized I bought the wrong adapter. Now I want to know if my iMac supports pcie x4
First the Samsung PM981 NVMe PCIe M.2 SSD (MZVLB256HAHQ) is not compatible with the custom Apple blade interface. Review this for more details The Ultimate Guide to Apple’s Proprietary SSDs You’ll need to remove it and then you should be able to startup your system using just the Toshiba SATA HDD. Update (07/17/2019) If you are looking for performance than getting at least a 256 GB blade SSD is what I would get in addition with your HDD 256 GB Custom Samsung SSD. If you can you might want to get a 512 GB. You’ll need to stick with the Apple Blade SSD if that’s the direction you want. Otherwise you could swap out your HDD for a SSD drive. This is the cheapest solution but then you need to consider where are you storing your data. Getting a larger SSD like a 1 or 2 TB iMac Intel 27" (Late 2012-2019) SSD Upgrade Kit or looking at using an external USB Samsung T5 External SSD. Frankly, I recommend the internal dual drive setup as the blade interface is so much faster than the SATA interface for your boot drive.
