So here's the deal. I have a 120GB PS3 Slim model that I want to upgrade the HDD to a 1TB if possible for that size. I already have a spare 250GB HDD that I took from a spare PS3 Slim console that I sold off for parts. I tried to use it in place of the original 120GB drive but I noticed the two drives have difference connections. They both have the standard SATA interface but the 120GB drive doesn't seem to have the same power connection like the 250GB has and it will not work in place of the 120GB drive.
This is what my 250GB drive looks like. The 120GB drive that's inside my PS3 does not have the same power connection.
This is what my 250GB drive looks like. The 120GB drive that's inside my PS3 does not have the same power connection.