Maybe I'm obsessing, and feel free to tell me that, but I'm on my second 1.3 and it is getting lower Geekbench 3 scores than my first. I love the machine, but my first had the 256gb SSD and I decided to get the 512 so I returned it. My first one got about 2800 single core 5600 multicore on 64 bit Geekbench, which seems in line with what others report. I just got my second 1.3 with the 512 and I seem to get only about 2600 single core, 5200 multi core consistently, although once I got 2800 single core, 5500 multicore (I'm rounding). Should I return it? I paid extra for the 1.3 and I'm not sure I got what I paid for. I've had the Mac for about 3 days now. I've repaired permissions, am running no other apps, etc. Before I returned the first 1.3 I duped the drive with super duper and used that to build the system for the second one (I didn't want to download all my Photos again - I have a large library). Thanks for any advice. I'd like to keep this one, and don't feel like waiting again, but I guess I can do it if I got a poor 1.3.