Hello I have Late 27" 2015 A1419 iMac. EDIT: I installed a new Apple/Samsung SSPOLARIS MZ-KKW5120 PCIe NVME SSD and...

I just took apart everything in my Late 2015 27" iMac in order to install a bigger PCIe SSD. I accidentally broke off the...

Hello I was wondering if iMac (Retina 5K, 27-inch, Late 2015) was compatible to have the fusion drive upgraded to SSD?...

I actually found out the answer from two different sources. Some guy from eBay: "Yes this is a known issue. If you dig through the internet, you'll find users that have experienced this exact issue. It has to do with the iMac chipset for that model year which affects a small percentage of those iMac owners. We've seen this same issue as well with UK/Aus iMac models as well. The AHCI model is not as fast as the NVMe since it doesn't use that communications protocol. (~2200MB/s Read 1700MB/s Write on x4 link width iMacs). Since the newer versions are more efficient, there is no throttling under heavy loads. Also note that the deep sleep issue is just a small portion of the problem. Users have also complained about corruption and data loss. " This one was from Beetstech: "I don't think your SSD is faulty. Looking back on our testing of SSPOLARIS controlled NVMe Apple drives it appears we noted a kernel panic on wake from sleep on some 2015 A1419's."