After using my macbook pro with an SSD, the iMac's performance felt awful and sluggish. So I decided to install a second drive for the OS and apps.
slow.. first time took me 150min, my second run was finished in just 45-60min.
Lot's of tiny little cables and sliding in and out the Logicboard nearly made my rage level raise to over 9000.
I had to redo it,after finishing the install and noticing that my USB ports were shifted...
-use a box for the different screws
-check the USB, Ethernet ports after sliding back the logic board, is everything back in place, or is it shifted?
-use a flashlight