Hello all, I have an early 2011 15" MacBook Pro (a1286). 2.2GHz Intel Core i7. I have upgraded to a sandisk SSD (256GB). And I also upgraded to 16GB crucial DDR1333 ram. I am running the latest version of Sierra (10.12.5). My computer has been running slow ever since and I have tried many things to fix it. I have reset the PRAM and the SMC. I have replaced the HDD flex cable, the cable that connects the hard drive to the computer. I put the original memory back in, so I know that it's something either to do with the hard drive or maybe some other physical component. When I turn it on, the apple logo appears right away, but takes 1-2 minutes to get to the log-in screen. And while using the computer it is extremely slow, slower than with the original hard drive. I have searched everywhere and no one seems to have the exact symptoms that I'm experiencing. I have made sure that the boot disk is set to the SSD. I have also gone in and fixed the kernel task issue that seems to plague these 2011 machines. Any help! Thank you!!!