Update; This started as isolated test of the Corsair Vengeance RAM, but has now grown to also include the Kingston HyperX PnP RAM. Kingston info starts in post #13 (http://forums.macrumors.com/showpost.php?p=16695272&postcount=13) Finally managed to get a hold of the Corsair Vengeance 16GB 1866MHz CL10 Kit (CMSX16GX3M2A1866C10) to try it out in the 2012 Mini. Popped it in, booted into Apple Hardware Test and verified that my suspicions was right; the 2012 Mini runs the RAM at 1600MHz. Ran the Apple Hardware Test fine, then Booted up Memtest86+ to verify the timings: 9-10-9-26 (First picture attached). Let it go quickly for 1 pass, worked out fine. Booted into OS X and ran iBench, NovaBench, XBench and Geekbench in that order. I attached the pictures of the summaries from iBench, NovaBench and XBench and the RAM tests really does get a boost from them. The Geekbench results is available for comparison here: http://browser.primatelabs.com/geekbench2/compare/1549130/1548933 What can be seen is that the RAM performance of the Vengeance 1866MHz kits are really good. Some of the tests (especially NovaBench) seem to give a better score for simply having more RAM. None of the tests however did allocate the amount of memory that it should be noticeable with just the size increase. I also ran bandwidth, both 32 bit and 64 bit, to try to isolate out a smaller part of memory and do bandwidth testing, but everything there fell within statistical margins, and could hardly be registered by visually inspecting the graph given as output, so I believe that in the end that tool is more CPU bound than RAM bound. Word of caution here; After doing these tests last night, I once again booted up Memtest86+, and let it run over night. When I woke up I found that it had completed 4 passes, detecting 3 errors... (Last attachment) I might've caught a bad kit, I'm not sure. I'm going to go over and try to replace my kit at the retailer, with my photos as evidence of it not being quite healthy. I will also have to see if I will be getting a new Vengeance 1866MHz CL10 Kit, or if I simply should exchange it for one of the Kingston 1600MHz CL19 Kits that has been reported as good by other forum members (but which is almost $30 more expensive at my retailer). The Kingston 1600MHz Kit's (both the "regular" and the Low-Voltage) is running at 9-9-9-27 timings compared to the 9-10-9-26 timings of the Vengeance 1866MHz (when run at 1600MHz), so its not quite clear which one is theoretically faster. It all boils down to exactly how the application you are running uses the memory.