Very interesting benchmarks. I have screen prints, but I don't have time to upload them tonight so you'll just have to take my word for it... Geekbench 32bit (I don't own a license): Stock 4GB @ 1600mhz - 10734 16GB @ 1333mhz - 10958 (tried it again and got 10997 ) Xbench (first number is stock 4GB, second is 16GB @ 1333mhz): Overall Score: 334.66 / 329.49 CPU: 266.70 / 271.39 Memory Test: 633.23 / 625.53 Quarts Graphics Test: 526.67 / 505.27 OpenGL: 251.87 / 244.61 User Interface: 267.17 / 261.48 Handbrake encoding*: Stock 4GB @ 1600mhz - 6:42 16GB @ 1333mhz - 6:43 * I ripped a copy of 10 Things I Hate About You in VOB format and converted it to h.264 at Handbrake's "Normal" Setting One of two conclusions can be made of the above results: 1. In none of the tests was there a statistical significant difference in the results (meaning that the results were all to close to say either was "faster" than the other by any major margin). 2. If upgrading from the Stock amount of RAM, then going with "slower" RAM will not significantly impact performance. This can be because of one of the following: A. The Mini is starved for RAM at 4GB and any loss in performance by using slower RAM is made up for by having more. B. Or in the end the bandwidth loss by going with slower 1333mhz (but lower latency) isn't enough of a performance loss to make a significant difference in the over all performance of our Mini's. So my point? Buy whatever is a good deal because in the end it probably isn't going to make a significant difference unless money is no object (of course).