I have a white macbook 2009 unibody with 8 GB RAM. I just upgraded to mountain lion and windows 7 64 bit. I bought a Samsung 840 SSD (non pro) and I realize my motherboard is limited to SATA 2 speeds. When I run Samsung Magician's version 4 software, the benchmarks records about 200 MB write and read speed, which sounds okay if the theoretical limit is 375 MB/sec for SATA 2. But the IOPS performance is confusing. It's a lot slower than what the drive is capable of. Can someone look at my screenshot and provide some guidance on this? My real world performance copying a 900 mb file to desktop obtained about 150 mb/sec speed, which sounds pretty good to me, but I'm not sure if that's slow or not. Btw, I did all of the performance and OS tweaks the Magician software recommended, and it hardly affected performance (made it worse by a little). Also Magician reports that AHCI is not enabled, it can't detect the SATA Interface, and looking through the Windows registry, TRIM seems to be off. But Samsung's software doesn't provide a way to turn it on, and AHCI seems to require a master boot record edit to enable. Thanks in advance.