OK, I have gone through some of the posts here, but just want to verify before proceeding with the 2 840Pro 128G drives that I will be getting in soon. Right now I have Win 7 64 bit installed and have SATA in BIOS set for EIDE. I plan on reloading a fresh install of Win 7 on my computer using one of the SSDs as the Win 7 drive and the other as a games drive. Before I reload Win 7 I will be changing the BIOS setting to AHCI. 1. Before I change the setting to AHCI and reloading Win 7 I figured I'd connect the SSDs to my presently setup computer and verify firmware with Samsungs Magician Tool and upgrade if necessary. Any thoughts on my not doing that? 2. When I usually start a fresh install of Windows, I usually do a full format of the drive I will be loading it on. Is this done with SSDs also, or do you never do a "FORMATTING" of SSD drive? 3. I have seen some posts that optical drives don't do well when SATA is set for AHCI. I have an ASUS BW-12B1ST bluray drive in the system. Will it be OK with this setting? Also a 150G raptor drive and 2 1G WD black drives which I believe should be OK with this setting change. 4. On Samsungs web page for compatible versions of Windows and running their Magician Tool, it states Win 7 32 bit, but not Win 7 64 bit. Has anyone had problems running this with Win 7 64 bit? Sorry if I'm duplicating previous posts questions, but it's rough trying to sift through so much. Thanks.