Hello, I have recently purchased a 256gb Samsung 830. I am getting ready to install it soon, but wanted to ask a few questions here first. There is a ton of information out there and I have been able to solve most of my questions, but have a few outstanding ones that I couldn't get answered by my own research or post on the main Samsung 830 Thread. Any help is greatly appreciated. I have a 5,5 mid-2009, 13 inch Macbook Pro. The model identifier is MB991LL/A. I am currently running Snow Leopard 10.6.8. TRIM I would like to understand exactly what to do about TRIM and garbage disposal. Some say that I do not need to enable the TRIM because Samsung drives have their own software to handle this. Others say I must definitely enable TRIM to get the most out of my drive. Could somebody please clear this up for me and tell me what the general consensus is? If I should enable TRIM what is the best way to do this (there seems to be several different options). SATA Issues My system profiler shows that my SATA driver is an nVidia MCP79 AHCI (SATA II). However, my stock HDD has a negotiated link speed at SATA I rates. Here is the info from my system profiler: NVidia MCP79 AHCI: Vendor: NVidia Product: MCP79 AHCI Link Speed: 3 Gigabit Negotiated Link Speed: 1.5 Gigabit Description: AHCI Version 1.20 Supported I am running EFI Firmware 1.7 (Boot ROM Version: MBP55.00AC.B03). My understanding is that this firmware should have increased the negotiated link speed to 3gb/s. Why am I still at SATA I speeds? When I install the Samsung 830, will I see the negotiated link speed increase to 3 gb/s or will it remain at 1.5 gb/s? What do I need to do to increase it to 3 gb/s? I apologize for all of the questions and appreciate your help. Thanks!